CN1881835B - Satellite broadcasting system - Google Patents
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- CN1881835B CN1881835B CN2006100907796A CN200610090779A CN1881835B CN 1881835 B CN1881835 B CN 1881835B CN 2006100907796 A CN2006100907796 A CN 2006100907796A CN 200610090779 A CN200610090779 A CN 200610090779A CN 1881835 B CN1881835 B CN 1881835B
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Abstract
A satellite broadcasting system is provided. In a broadcasting receiver, to quickly switch channels of the received multiplexed broadcasting signals at a high response speed to improve the convenience for a viewer, when broadcasting signals of a plurality of channels are to be code-division-multiplexed and broadcasted from a ground broadcasting station (BC 1, BC 2 ) to a broadcasting receiver (MS) in a service area via a geostationary satellite (SAT), the broadcasting signals are multiplexed and transmitted after matching the spreading code phase between the channels in the ground broadcasting station (BC 1, BC 2 ).
Description
The application be that July 3, application number in 1998 are 200410028285.6 the applying date, denomination of invention divides an application for the application of " broadcasting-satellite system ".
Technical field
The present invention relates to a kind of broadcasting-satellite system, this system utilizes broadcasting satellite or the communication satellite on the geostationary orbit to broadcast such as information such as video, audio frequency and data to specific ground service district, relates in particular to a kind of employing code division multiplex (CDM: code division multiplex) a plurality of channels are carried out system multiplexed and broadcasting.
Background technology
In recent years, along with the increase of communication requirement and the progress of the communication technology, various communication systems are constantly developed.Wherein a kind of communication system is to utilize the broadcasting satellite on the geostationary orbit or the broadcasting-satellite system of communication satellite.This broadcasting-satellite system has such advantage, and it need not ground any large-scale infrastructure, just can provide the information broadcast service to a broad service area.
Up to now, broadcasting-satellite system is a kind of analogue system in operation, and it adopts frequency division multiplexing (FDM: frequency division multiplexing) carry out multiplexed to a plurality of channels.Yet in such system, because the multiplexed rate of channel of each frequency is low, therefore this system can not satisfy along with recent Development of Multimedia Technology ever-increasing to more multi channel demand.
Recently, digital broadcasting satellite system has obtained broad research and development.OFDM) or code division multiplex (CDM: for example determined to adopt OFDM (OFDM: like this, code division multiplex) as the channel multiplexing modes.
Yet these multiplexing modes had various problems to solve before being applied to broadcasting-satellite system.Specifically, receiver be a certain broadcast singal set up extended code synchronously before, CDM for example needs that length is a period of time of second surplus in the of 10.Therefore, receiver needs segment length's time from the beginning channel switch to finishing.When channel switch, observer must be waited for segment length's time, thereby feels not too satisfied.In some cases, important information may be lost during channel switch, therefore must take measures.
In view of the above problems, press for a kind of broadcasting-satellite system, this system allows broadcasting receiver promptly to switch the channel of the multiplexed broadcast singal that received with high response speed, thereby makes observer more convenient.
In Japan, utilize the broadcasting-satellite system of BS (broadcasting satellite) and CS (communication satellite) to come into operation, and digital broadcasting is also started.In some other country, the broadcasting-satellite system of almost same scale is also developed and come into operation.
Yet these broadcasting-satellite systems require to adopt diameters to be about 40 to 50cm parabolic antenna or the few identical planar array antenna of difference in size as reception antenna.In addition, unless antenna accurately to satelloid, otherwise can not get enough gains, thereby can not receive.
Because these systems take indoor reception/rating, the requirement that therefore is difficult to provide a kind of satellite broadcast receiver that adopts the simple antenna system, this antenna system to satisfy on tracker action, to use or uses as portable equipment.A kind of device that satisfies these requirements can be effective as a kind of device that emergence message is provided when disaster or situation like that, it can be realized eventually in the near future.
Planned to satisfy these requirements with various types of broadcasting-satellite systems or satellite broadcast receiver, these broadcasting-satellite systems make receiver can adopt a kind of simple antenna system to receive.Yet because these systems or device use the very high frequency as S-band, and these radio waves have strong linear propagation characteristic, so under the egregious cases, these radio waves may be blocked by little barrier such as electric wire.Usually, when receiving terminal when mobile, some little barriers constantly enter between broadcasting satellite and the receiving terminal.This can cause instantaneous interruption repeatedly and influence the quality of reception greatly.
According to this viewpoint, press for a kind of wireless receiver, a kind of wireless broadcast system and a kind of radio broadcasting device, they can make the influence of the instantaneous interruption that barrier causes minimum and obtain the satisfied quality of reception.
In building zone behind, do not receive direct wave from satellite.In order to address this problem, large diameter common antenna is installed on the top of high-rise or tower seat usually.This common antenna reception and amplification are from the radiofrequency signal of satellite.By coaxial cable or optical cable, the radiofrequency signal that is received is distributed to the receiver that is in building user behind.Utilize this configuration, be in behind those of building and do not receive user from the radiofrequency signal of satellite and also can receive transmission information fully from this satellite.
Yet therefore this public receiving system needs large-scale facility and a large amount of expenses because cable must be applied to all users.Recently, the plan utilization broadcasting-satellite system not only carries out message transmission to fixed station but also to travelling carriage.Like this, the user who is in building fixed station behind can be by above-mentioned public receiving system, and reception is from the information of satellite.Yet,, therefore be in building travelling carriage behind and can not receive information from satellite because coaxial cable or optical cable can not be applied to travelling carriage.
In this case, press for a kind of broadcasting-satellite system and corresponding a kind of calking (gap filler) device, this system can make and be in building can not directly receive from fixed station and travelling carriage in the zone of the radiofrequency signal of satellite behind, all need not to be equipped with large-scale equipment and can receive this radiofrequency signal well, thereby realize cheap and effectively calking.
In the broadcasting-satellite system of any kind, when the broadcast channel number increases, correspondingly increased requirement to the output of the transponder end power amplifier on the satellite, therefore, it is difficult requiring to increase the broadcast channel number.
According to above-mentioned viewpoint, press for a kind of broadcasting-satellite system and a kind of receiving terminal, they can easily increase the number of channel with a kind of simple configuration.
These broadcasting-satellite systems require to adopt diameters to be about 40 to 50cm parabolic antenna or the few identical planar array antenna of difference in size as reception antenna.In addition, unless antenna accurately to satelloid, otherwise can not get enough gains, thereby can not receive.Because these systems take indoor reception/rating, the requirement that therefore is difficult to provide a kind of satellite broadcast receiver that adopts the simple antenna system, this antenna system to satisfy on tracker action, to use or uses as portable equipment.A kind of device that satisfies these requirements can be effective as a kind of device that emergence message is provided when disaster or situation like that, it can be realized eventually in the near future.
In this case, press for a kind of broadcasting-satellite system and a kind of satellite broadcast receiver, this system makes receiver can adopt a kind of simple antenna system to receive, and this antenna system can satisfy the requirement of using or using as portable equipment on tracker action.
Recently, a kind of satellite broadcast receiver that is used for the above-mentioned satellite broadcasting of reception on tracker action such as automobile has had general development.
For receiving satellite broadcast on tracker action such as automobile, as mentioned above, the driver need change receive channel on some channels.Since this channel selection operation inconvenience, and disperse the driver-operated attentiveness, therefore may cause traffic accident.
For fear of this danger, various dangerous prevention methods are adopted in suggestion traditionally, but also do not have conclusive method.Therefore, press for a kind of satellite broadcast receiver, the convertible receive channel of this receiver, and can not disperse the driver-operated attentiveness.
Be used for stimulating driver's music to help sometimes to prevent that driving procedure is sleeping.Yet, depending on driver's degree of fatigue, dull music may make the driver sleeping, thereby causes reverse effect.This is not only applicable to the driver of automobile, and is applicable to the operator who handles various tracker actions.
According to this viewpoint, press for a kind of satellite broadcast receiver, the convertible receive channel of this receiver, and can not disperse tracker action driver-operated attentiveness.Also press for a kind of satellite broadcast receiver in addition, this receiver can be according to driver's fatigue conditions, and conversion is controlled to receive channel, thereby avoids traffic accident.
Summary of the invention
Correspondingly, an object of the present invention is, a kind of broadcasting-satellite system is provided, this system allows receiver terminal device promptly to change the channel of the multiplexed broadcast singal that received with high response speed, thereby makes observer more convenient.
Another object of the present invention is, a kind of broadcasting-satellite system is provided and is used for the receiver terminal device and the broadcaster of this system, and they can make the influence of the instantaneous interruption that barrier causes minimum and obtain the satisfied quality of reception.
Another purpose of the present invention is, a kind of broadcasting-satellite system and corresponding a kind of calking device are provided, this system can make and be in building can not directly receive from fixed station and travelling carriage in the zone of the radiofrequency signal of satellite behind, all need not to be equipped with large-scale equipment and can receive this radiofrequency signal well, thereby realize cheap and effectively calking.
Another purpose of the present invention is, a kind of broadcasting-satellite system and a kind of receiving terminal are provided, and they can easily increase the number of channel with a kind of simple configuration.
Another purpose of the present invention is, a kind of broadcasting-satellite system and a kind of satellite broadcast receiver are provided, this system makes receiver can adopt a kind of simple antenna system to receive, and this antenna system not only can satisfy the requirement of indoor use but also can satisfy the requirement of using or using as portable equipment on tracker action.
Another purpose of the present invention is, a kind of satellite broadcast receiver is provided, the convertible receive channel of this receiver, and can not disperse tracker action driver-operated attentiveness.Another purpose of the present invention is, a kind of satellite broadcast receiver is provided, and this receiver can be according to driver's fatigue conditions, and conversion is controlled to receive channel, thereby avoids traffic accident.
According to an aspect of the present invention, a kind of radio receiver is provided, be used for from the radio broadcasting device radio broadcasting transmitting the wireless broadcast system that data are carried out band spectrum modulation and carried out the multiplexed transmission signal that obtains, and carry on moving body, this radio receiver is characterised in that, possess: receiving element, carry out Rake to the aforementioned transmission signal from the wireless transmission of aforementioned radio broadcasting device and receive, and aforementioned transmission data are carried out demodulation; Memory cell is used for the transmission data that will obtain by this receiving element at least during the store predetermined; Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal; Compensating unit, according to the transmission data that are stored in the aforementioned memory cell, compensation and the corresponding transmission data of transmission signal section that detect instantaneous interruption by this instantaneous interruption detecting unit.
According to a further aspect in the invention, a kind of wireless broadcast system is provided, to carry out band spectrum modulation respectively and carry out the multiplexed transmission signal that obtains the transmission data of a plurality of broadcast channels from radio transmission device to the radio receiver radio broadcasting, it is characterized in that, aforementioned radio transmission device possesses: transmitting element once more, any one of aforementioned a plurality of broadcast channels used channel as sending again, and the transmission signal loading of the part that aforementioned radio receiver request is sent once more sends with sending once more on the channel once more to aforementioned, aforementioned radio receiver possesses: receiving element, aforementioned transmission signal from aforementioned radio broadcasting device radio broadcasting is carried out Rake receive, and aforementioned transmission data are carried out demodulation; Delay cell is used to make the transmission data with obtaining by this receiving element to postpone specified time limit at least; Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal; Send request unit once more, send the transmission signal that detects the part of instantaneous interruption by aforementioned instantaneous interruption detecting unit to aforementioned radio broadcasting device request once more; Compensating unit, when the transmission signal of the part that sends once more from the aforementioned request that receives of transmitting channel once more by aforementioned receiving element, the transmission data of utilization after aforementioned receiving element is by demodulation, the lost part that the aforementioned instantaneous interruption of the transmission data that are delayed in aforementioned delay cell is caused compensates.
According to a further aspect in the invention, a kind of radio receiver is provided, be used for the transmission data of a plurality of broadcast channels being carried out band spectrum modulation and carrying out the wireless broadcast system of the multiplexed transmission signal that obtains from the radio broadcasting device radio broadcasting, and carry on moving body, this radio receiver is characterised in that, possess: receiving element, carry out Rake to the aforementioned transmission signal from aforementioned radio broadcasting device radio broadcasting and receive, and aforementioned transmission data are carried out demodulation; Delay cell is used to make the transmission data with obtaining by this receiving element to postpone specified time limit at least; Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal; Send request unit once more, send the transmission signal that detects the part of instantaneous interruption by this instantaneous interruption detecting unit to aforementioned radio broadcasting device request once more; Compensating unit, when the response of aforementioned radio broadcasting device receive the aforementioned request that sends request unit once more, when the transmission signal loading of the part of being asked is sent to one transmitting channel once more as aforementioned broadcast channel, the transmission data of utilization after aforementioned receiving element is by demodulation, the lost part that the aforementioned instantaneous interruption of the transmission data that are delayed in aforementioned delay cell is caused compensates.
According to a further aspect in the invention, a kind of radio broadcasting device is provided, to carry out band spectrum modulation and carry out the multiplexed transmission signal that obtains the transmission data of a plurality of broadcast channels respectively to the radio receiver radio broadcasting, it is characterized in that, possess: memory cell, the transmission data that storage and maintenance have been sent out; The request of transmission once more of the transmission data of the lost part from aforementioned radio receiver received signal notice, aforementioned transmission signal is accepted in the retransmission process unit; Transmitting element once more use channel with any one of aforementioned a plurality of broadcast channels as sending once more, asks according to aforementioned the transmission once more, and the transmission signal loading of the part of being asked is sent to aforementioned transmitting channel once more.
Description of drawings
Fig. 1 is the schematic diagram of the broadcasting-satellite system of explanation first embodiment of the invention.
Fig. 2 is the configuration block diagram at the terrestrial broadcasting station in explanation first execution mode.
Fig. 3 is the configuration block diagram of the geostationary satellite in explanation second execution mode of the present invention.
Fig. 4 is the configuration block diagram at the terrestrial broadcasting station in explanation the 3rd execution mode of the present invention.
Fig. 5 is the configuration block diagram of the broadcasting receiver in explanation the 3rd execution mode.
Fig. 6 is the configuration block diagram of the geostationary satellite in explanation the 4th execution mode of the present invention.
Fig. 7 is the configuration block diagram of the geostationary satellite in explanation the 5th execution mode of the present invention.
Fig. 8 is the configuration block diagram of the geostationary satellite in explanation the 6th execution mode of the present invention.
Fig. 9 is the configuration block diagram at the terrestrial broadcasting station in explanation the 6th execution mode.
Figure 10 A and 10B are the working timing figures that is used for illustrating the 6th execution mode.
Figure 11 is the configuration schematic diagram of explanation according to the broadcasting-satellite system of the 7th to the 9th execution mode of the present invention.
Figure 12 is the profile view of the broadcasting satellite SAT among explanation Figure 11.
Figure 13 is the allocation plan of explanation according to the satellite broadcast receiver of the 7th execution mode of the present invention.
Figure 14 is the view that the antenna on the tracker action is provided with an example of situation in explanation the 7th execution mode.
Figure 15 A to 15C is explanation, when the tracker action that satellite broadcast receiver is housed is mobile under certain barrier, arrives the variation diagram of the radio wave of satellite broadcast receiver shown in Figure 13.
Figure 16 A and 16B are explanations, when this tracker action that satellite broadcast receiver is housed is mobile under this barrier, arrive the variation diagram of the radio wave of satellite broadcast receiver shown in Figure 13.
Figure 17 is the modified model figure of explanation according to the satellite broadcast receiver of the 7th execution mode.
Figure 18 is the allocation plan of explanation according to the satellite broadcast receiver of the 8th execution mode of the present invention.
Figure 19 is the allocation plan of explanation according to the broadcasting-satellite system of the 9th execution mode of the present invention.
Figure 20 is the schematic diagram of explanation according to the broadcasting-satellite system with calking function of the tenth execution mode of the present invention.
Figure 21 is the configuration block diagram of employed calking device in the broadcasting-satellite system of explanation according to the tenth execution mode.
Figure 22 is the plan view that is used to illustrate according to the broadcasting-satellite system of the 11 execution mode of the present invention.
Figure 23 is the front view that is used to illustrate according to the broadcasting-satellite system of the 11 execution mode.
Figure 24 is the blind area coverage diagram that is used for illustrating according to the broadcasting-satellite system of the 11 execution mode.
Figure 25 is the blind area coverage diagram that is used for illustrating according to the broadcasting-satellite system of the 11 execution mode.
Figure 26 is the configuration block diagram of explanation according to the hop at employed terrestrial broadcasting station in the broadcasting-satellite system with calking function of the 12 execution mode of the present invention.
Figure 27 is the configuration block diagram of explanation according to employed broadcasting receiver in the broadcasting-satellite system with calking function of the 12 execution mode.
Figure 28 is the configuration block diagram of the receiver in the explanation broadcasting receiver shown in Figure 27.
Figure 29 is the schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 13 execution mode of the present invention.
Figure 30 is the schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 14 execution mode of the present invention.
Figure 31 is the configuration block diagram of the transponder of employed geostationary satellite in the explanation system shown in Figure 30.
Figure 32 is the configuration block diagram of employed calking device in the explanation system shown in Figure 30.
Figure 33 is the schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 15 execution mode of the present invention.
Figure 34 is follow-on schematic diagram of explanation system shown in Figure 33.
Figure 35 is first configuration schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 16 execution mode of the present invention.
Figure 36 is second configuration schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 16 execution mode.
Figure 37 is three configuration schematic diagram of explanation according to the broadcasting-satellite system with calking function of the 16 execution mode.
Figure 38 is the configuration schematic diagram of explanation according to the broadcasting-satellite system of the 17 execution mode of the present invention.
Figure 39 is the allocation plan of explanation transfer station shown in Figure 38.
Figure 40 is the allocation plan of explanation geostationary satellite shown in Figure 38.
Figure 41 is the figure of explanation according to the receiving terminal of the 17 execution mode.
Figure 42 is the figure of the receiver in the explanation receiving terminal shown in Figure 41.
Figure 43 is the schematic diagram of explanation according to the broadcasting-satellite system of the 18 execution mode of the present invention.
Figure 44 is the given configuration view of employed geostationary satellite and antenna that this satellite is adorned in the system of explanation the 18 execution mode.
Figure 45 is the routine service area division figure of explanation when using multi-beam figure in the system of the 18 execution mode.
Figure 46 is the profile view of receiver of the satellite broadcasting electric wave of the explanation system that is used to receive the 18 execution mode.
Figure 47 is the internal circuit configuration block diagram of receiver of the satellite broadcasting electric wave of the explanation system that is used to receive the 18 execution mode.
Figure 48 A and 48B are the direction characteristic figure of the employed antenna of receiver of the satellite broadcasting electric wave of the explanation system that is used for receiving the 18 execution mode.
Figure 49 is the configuration block diagram that the MPEG4 image transmission device of the system that is applicable to the 18 execution mode is described.
Figure 50 A and 50B are the example broadcasting screen format charts in the system of explanation the 18 execution mode.
Figure 51 is the configuration block diagram of explanation according to the satellite broadcast receiver of the 19 execution mode of the present invention.
Figure 52 is the demonstration example figure that the selection window of the layering receive channel of being stored in the program data memory block of the satellite broadcast receiver shown in Figure 51 is described.
Embodiment
The present invention is described in detail in detail below with reference to accompanying drawings.
By first to the 6th execution mode a first aspect of the present invention is described.
(first execution mode)
Fig. 1 is the schematic diagram of the broadcasting-satellite system of explanation first embodiment of the invention.
This broadcasting-satellite system comprises a plurality of terrestrial broadcastings station (VSAT) BC1 and BC2 or the feeder link station as the dispensing device of ground station, a geostationary satellite SAT and a Satellite Tracking control desk STCC as the satellite retransmission unit.
Terrestrial broadcasting station (VSAT) BC and BC2 or feeder link station, each sends broadcasting station (broadcaster) made and editor's programme information all with Ka wave band (26.5 to 40GHz) or Ku wave band (12.5 to 18GHz) to this geostationary satellite SAT by uplink transmission channels.
Ka wave band that it is the 2.5m level that geostationary satellite SAT is equipped with a diameter or Ku wave band antenna and S-band (for example 2.6GHz) antenna that diameter is the 15m level.One of these broadcasting stations (VSAT) BC1 and BC2 or feeder link station the multiplexed and broadcast singal that sends, received by Ka or Ku wave band antenna and amplify, be transformed to the signal of S-band again.Broadcast singal after the conversion, with S-band by downlink transmission channel from the S-band antenna transmission to service area.Be contained in the ul transmissions antenna on the geostationary satellite SAT, its diameter can be less than the 2.5m level.This S-band antenna, its diameter also can not be 15m level but 8m level.
Satellite Tracking control desk STCC monitors and controls the operating state of this geostationary satellite SAT.
In service area, be fixedly mounted in the broadcasting receiver (not shown) in office for example or the family or be contained on the automobile or, receive with S-band and send to broadcast singal the S-band downlink transmission channel from geostationary satellite SAT as the entrained movable radio receiver MS of portable equipment.In the S-band downlink transmission channel, transmission rate is that a plurality of channels that mostly are 900 channels most of 64 to 256Kbps/ channels are by multiplexed.In order to send vision signal, adopt MPEG4 (active images expert group 4) as method for video coding with a certain channel.
When a plurality of programs will and send by code division multiplex, terrestrial broadcasting station BC1 and BC2 in first execution mode, each can both make the phase matched of the extended code of a plurality of interchannels, and has following configuration.Fig. 2 is the configuration block diagram of explanation hop.
The broadcast singal of a plurality of programs that a certain circuit (not shown) is edited (being N program among Fig. 2) is input to modulator 111 respectively to 11n.Owing to be such structure, to 11n, be used to extended codes 121 to 12n from the extended code generator and that fixed phase separately produces synchronously at separately expending modulator 111, the broadcast singal of each program is carried out band spectrum modulation.These broadcast singals after expending modulator 111 to the 11n band spectrum modulation are synthesized device 131 and synthesize a code division multiplex (CDM) broadcast singal, are input to modulator 132 then.Modulator 132 adopts further to be modulated this CDM broadcast singal such as the digital modulation of QPSK or QAM.CDM broadcast singal frequency conversion after transmitter 133 will be modulated is the radiofrequency signal of Ka or Ku wave band.This radiofrequency signal is amplified to predetermined transmit power level, sends to geostationary satellite from antenna 134 then.
Terrestrial broadcasting station BC1, BC2 have a control circuit 140.This control circuit 140 produces a reference phase signal that is used to indicate the fixed phase of extended code, and this signal is offered extended code generator 121 to 12n.The reference phase signal that extended code generator 121 to 12n and control circuit 140 provide synchronously begins to produce extended code.
Utilize this configuration, the extended code that expending modulator 111 to 11n utilizes extended code generator 121 to 12n and fixed phase to produce is synchronously expanded modulation to the broadcast singal of these programs respectively.Therefore, the CDM broadcast singal of combiner circuit 131 outputs has the extended code phase place of these interchannel couplings, so this CDM broadcast singal with extended code phase place of coupling is broadcast to broadcasting receiver MS by geostationary satellite SAT.
As among the broadcast receiver MS of receiver terminal device,, in phase produce and the corresponding extended code of all channels then in case for example start is just synchronous for setting up extended code by one of channel in this CDM broadcast singal of geostationary satellite SAT arrival.Even when being transformed into one other channel, broadcasting receiver MS only just can receive this channel soon by the conversion extended code, and need not that to rebulid extended code synchronous for this channel.
(second execution mode)
In second execution mode of the present invention, geostationary satellite SAT detects the extended code phase difference from the interchannel of the CDM broadcast singal of each terrestrial broadcasting station BC1 or BC2, and according to testing result, make the extended code phase matched of interchannel, then a signal is sent to broadcasting receiver MS.
Fig. 3 is the configuration block diagram of explanation according to the geostationary satellite SAT of second execution mode.With reference to Fig. 3, the CDM broadcast singal that terrestrial broadcasting station BC1 or BC2 send is input to receiving circuit 152 after 151 receptions of Ku wave band reception antenna.This CDM broadcast singal amplifies through low noise, down-converts to the IF signal, is redistributed to k correlator 161 to 16k.The number of correlator 161 to 16k according to terrestrial broadcasting station BC1 or BC2 the total k of multiplexed/channel of sending set.Correlator 161 is to 16k, by the predefined extended code of channel usage the frequency spectrum of reception IF signal carried out despreading (despread).Received signal after the despreading is input to expansion modulation circuit 171 respectively to 17k.
When the frequency spectrum of reception IF signal will be by despreading, each all receives IF signal and an extended code (orthogonal code with institute correlator 161 to 16k, for example formulated with irrelevant Walsh sign indicating number or the Gold sign indicating number of PN sign indicating number) carry out relevantly, and correlation is input to control circuit 180.Control circuit 180 detects the phase difference between orthogonal code that is produced among the geostationary satellite SAT and the orthogonal code that is received according to pressing the correlation of channel from each correlator 161 to 16k.By channel produce make detected phase difference be zero phase control signal after, be input to corresponding expansion modulation circuit 171 to one of 17k.
Utilize this configuration, in this geostationary satellite SAT, the phase difference between the extended code of these channel signals in this CDM broadcast singal that detection terrestrial broadcasting station BC1 or BC2 send.Utilizing the extended code phase control again, expand the frequency spectrum of these channel signals, is zero thereby make detected phase difference, sends to this service area with S-band then.Therefore, even when the extended code phase place from the interchannel of this CDM broadcast singal of terrestrial broadcasting station BC1 or BC2 does not match, cause the attention of this geostationary satellite SAT at this phase difference after, this CDM broadcast singal also can be sent out and be broadcasted receiver MS and receive.
In being used as the broadcast receiver MS of receiver terminal device, in case for example start is just synchronous for setting up extended code by one of channel in this CDM broadcast singal of geostationary satellite SAT arrival.Even when being transformed into one other channel, broadcasting receiver MS only just can receive this channel soon by the conversion extended code, and need not that to rebulid extended code synchronous for this channel.
(the 3rd execution mode)
In the 3rd execution mode of the present invention, terrestrial broadcasting station BC1 or BC2 are when producing a CDM broadcast singal and sending this CDM broadcast singal, detect the extended code phase difference of interchannel, this phase information is sent out after being multiplexed into this CDM broadcast singal again.When one of channel that receives this CDM broadcast singal that arrives by geostationary satellite SAT selectively, broadcasting receiver MS basis is with received this phase information of this CDM broadcast singal, chip phase (chip phase) initialization with this extended code, and utilize this extended code that the frequency spectrum of the broadcast singal of each channel is carried out despreading selectively, thereby reproduce this broadcast singal.
Fig. 4 is the configuration block diagram of explanation according to the hop at the terrestrial broadcasting station BC1 of this execution mode and each station among the BC2.In Fig. 4, the identical parts of label representative with identical among Fig. 2 are not described in detail in this.
Broadcasting receiver MS has following configuration.Fig. 5 is the configuration block diagram of explanation broadcasting receiver MS.After being received by S-band reception antenna 191 from this CDM broadcast singal of geostationary satellite SAT, be input to receiving circuit 192, amplify through low noise, frequency conversion is the IF signal again.The IF signal allocation that is received is to first and second correlators 193 and 194.
The received signal that audio/video split circuit 1101 will reproduce is separated into voice data, video data and such as the additional data of text data.Reception voice data after the separation is input to audio decoder 1102.Institute's receiving video signals is input to Video Decoder 1104.Additional data is input to additional data decoder 1103.Audio decoder 1102 receives voice data decoding back reproducing audio signal with institute, and this audio signal is exported from loud speaker 1105 after amplifying.Video Decoder 1104 utilizes MPEG4 with institute's receiving video data decoding, and makes the display device 1106 that for example is made of LCD show decoded vision signal.Additional data decoder 1103 will be decoded such as the additional data of text data, and make display device 1106 show this decoded data in display video signal.
When operation part 197 translated channels, control circuit 190 be first correlator 193 distribute one with the corresponding extended codes of institute's allocated channel, go back the basic of distribution phase information and the extended code set produces phase place.Therefore, first correlator 193 is according to the chip phase of being distributed, produce this control circuit 190 that distributed with the corresponding extended code of this receive channel, so utilize this extended code, with the frequency spectrum despreading of reception IF signal.
In this system, the information of the extended code phase difference of expression interchannel is multiplexed in this CDM broadcast singal, and sends from terrestrial broadcasting station BC1 or BC2 with this CDM broadcast singal.Broadcasting receiver MS separates from this CDM broadcast singal and extracts this phase information.The chip phase of this extended code is initialised according to this phase information, therefore utilizes the frequency spectrum despreading of this extended code with the broadcast singal of required channel, thereby reproduces this broadcast singal.
Utilize extended code expand these channels broadcast singal frequency spectrum and when sending them, even local face broadcasting station BC1 or BC2 do not make the extended code of these channels synchronous when expanding the frequency spectrum of broadcast singal of these channels, broadcasting receiver MS also can be according to this phase information that sends from terrestrial broadcasting station BC1 or BC2 with the CDM broadcast singal, with the chip phase initialization of these extended codes, thereby utilize of the frequency spectrum despreading of this extended code with this CDM broadcast singal.Therefore, set up synchronous situation with the extended code of searching each channel and compare, this method can be at short notice to set up extended code synchronous for each channel.Thereby, can be with high response speed translated channel promptly.
(the 4th execution mode)
In the 4th execution mode of the present invention, when local face broadcasting station BC1 or BC2 will produce a CDM broadcast singal and send this signal, phase difference between the extended code of detection channel is multiplexed to this phase information in this CDM broadcast singal, sends again.In geostationary satellite SAT, separate and extract this phase information.Utilizing its phase place is the extended code of setting according to this phase information, expands the frequency spectrum of each channel signal of this CDM broadcast singal again, and this signal is sent to service area.
Fig. 6 is the configuration block diagram of explanation according to the geostationary satellite SAT of this execution mode.In Fig. 6, the identical parts of label representative with identical among Fig. 3 are not described in detail in this.
This geostationary satellite SAT not only has one group to be used for correlator 161 that the frequency spectrum to the CDM broadcast singal carries out despreading to 16k by channel, also has a correlator 157 that is used to separate and extract phase information.Correlator 157 is utilized as the transmission of phase information and predefined extended code, and the frequency spectrum of the IF signal that receives of receiving circuit 152 outputs is carried out despreading, thus separation and extract this phase information.
Utilize this configuration, even local face broadcasting station BC1 or BC2 do not make the extended code of these channels synchronous when expanding the frequency spectrum of broadcast singal of these channels, this phase information that the frequency spectrum of this CDM broadcast singal that terrestrial broadcasting station BC1 or BC2 send also can send simultaneously according to terrestrial broadcasting station BC1 or BC2, in geostationary satellite SAT, expanded again, be sent to the ground service district again.
Broadcasting receiver MS receives this CDM broadcast singal that the extended code of its interchannel has been established synchronously.Therefore, for arbitrary channel of this CDM broadcast singal, in case extended code is established synchronously, this broadcasting receiver MS only just can separate and reproduce the broadcast singal of required channel by the conversion extended code, and need not that to rebulid extended code synchronous for all the other channels.Thereby, can be with high response speed translated channel promptly.In addition, in the present embodiment, be used for carrying out initialized circuit according to this phase information, therefore can simplify the configuration of broadcasting receiver MS for each channel produces phase place to extended code because this broadcasting receiver MS needn't have one.
(the 5th execution mode)
In the 5th execution mode of the present invention, in geostationary satellite SAT, detection is from the phase difference of the extended code and a fixed phase of each channel of the CDM broadcast singal of terrestrial broadcasting station BC1 or BC2, detected phase information is multiplexed in this CDM broadcast singal, and is sent to the ground service district.When receiving the channel of this CDM broadcast singal selectively, broadcasting receiver MS is according to this phase information that is received with this CDM broadcast singal, chip phase initialization with this extended code, so, utilize this extended code selectively with the frequency spectrum despreading of the broadcast singal of each channel, thereby reproduce this broadcast singal.
Fig. 7 is the configuration block diagram of explanation according to the geostationary satellite SAT of present embodiment.In Fig. 7, the identical parts of label representative with identical among Fig. 3 are not described in detail in this.
From this CDM broadcast singal of terrestrial broadcasting station BC1 or BC2, after being received antenna 151 and receiving, amplify through low noise, be received circuit 152 again and be transformed to an IF signal.The IF signal allocation that receives to correlator 161 to 16k, the sum of the channel that what of correlator will send with this terrestrial broadcasting station BC1 or BC2 is relevant.
Expansion modulation circuit 158 utilizes extended code to expand the frequency spectrum of this phase information, and the phase information after the expansion is imported into combiner circuit 159.Combiner circuit 159 synthesizes the spread signal of this phase information and the CDM broadcast singal of receiving circuit 152 outputs.CDM broadcast singal after synthetic is a S-band frequency by frequency changer circuit 154 frequency conversions, is launched machine 155 again and is amplified to predetermined transmit power level, sends to the ground service district from S-band transmitting antenna 156 then.
As the broadcasting receiver that will use in the present embodiment, can adopt with reference to the same configuration of configuration described in the 3rd execution mode of Fig. 5.
Utilize this configuration, when earth synchronous satellite SAT receives the cdm signal of terrestrial broadcasting station BC1 or BC2 transmission, in geostationary satellite SAT, detect the extended code of each channel and the phase difference of fixed phase.After the information of expression phase difference is multiplexed in the cdm signal, offer broadcasting receiver MS again.
Broadcasting receiver MS separates from the CDM broadcast singal and extracts this phase information, and according to of the chip phase initialization of this phase information with these extended codes, so, utilize of the frequency spectrum despreading of this extended code, thereby reproduce this broadcast singal the broadcast singal of required channel.
Utilize extended code expand these channels broadcast singal frequency spectrum and when sending them, even local face broadcasting station BC1 or BC2 do not make the extended code of these channels synchronous when expanding the frequency spectrum of broadcast singal of these channels, broadcasting receiver MS also can be according to this phase information that sends from terrestrial broadcasting station BC1 or BC2 with the CDM broadcast singal, with the chip phase initialization of these extended codes, thereby utilize of the frequency spectrum despreading of this extended code with this CDM broadcast singal.Therefore, set up synchronous situation with the extended code of searching each channel and compare, this method can be at short notice to set up extended code synchronous for each channel.Thereby, can be with high response speed translated channel promptly.
In addition, according to present embodiment, because terrestrial broadcasting station BC1 or BC2 needn't have between the extended code that is used to detect these channels phase difference and multiplexed/send the circuit of this detections information, so can simplify the circuit arrangement of terrestrial broadcasting station BC1 or BC2.
(the 6th execution mode)
In the 6th execution mode of the present invention, in geostationary satellite SAT, detect the extended code phase difference between the number of C DM broadcast singal that a plurality of terrestrial broadcastings station BC1, BC2 and BC3 send.One is used to make phase difference is zero phase control signal, is offered as terrestrial broadcasting station BC1, the BC2 of information source and each among the BC3 by geostationary satellite SAT.Terrestrial broadcasting station BC1, BC2 and BC3 each all according to the phase information that is provided, control will be from installing the transmission timing of the broadcast singal that sends separately changeably, make that on geostationary satellite SAT the extended code phase difference between these CDM broadcast singals that these terrestrial broadcasting stations BC1, BC2 and BC3 are sent is zero.
Fig. 8 is the configuration block diagram of explanation according to the geostationary satellite SAT of present embodiment.In Fig. 8, each the CDM broadcast singal that sent of station among terrestrial broadcasting station BC1, BC2 and the BC3 after being received antenna 1111 and receiving, is amplified by low noise amplifier 1112.The CDM broadcast singal that receives by frequency changer circuit 1113 from the Ku band switching to S-band, be launched power amplifier 1114 again and be amplified to predetermined transmit power level, send to the ground service district from S-band transmitting antenna 1115 then.
The CDM broadcast singal that receives of low noise amplifier 1112 outputs is input to receiving circuit 1121, and frequency conversion is redistributed to correlator 1131 to 113k for for example IF signal.Number and each station among terrestrial broadcasting station BC1 and the BC2 of correlator 1131 to 113k be multiplexed/sum of the channel that sends
kConform to.
Correlator 1131 to 113k each all institute is received an IF signal and an extended code carry out relevant after, correlation is input to phase difference detecting circuit 1122.Phase difference detecting circuit 1122 is according to the correlation that comes the corresponding correlator in the autocorrelator 1131 to 113k by each channel, and the extended code that is produced among the detection geostationary satellite SAT and each receive the phase difference between the extended code.Making detected phase difference by the channel generation is zero phase control signal, and these phase control signals are input to modulation circuit (MOD) 1141 respectively again to 114k.
For phase control signal, each all carries out first modulation such as QPSK modulation circuit 1141 to 114k, and utilizes the extended code of being convenient to the phase control signal transmission to carry out band spectrum modulation.The expansion modulation signal of modulation circuit 1141 to 114k outputs is synthesized circuit 1123 and synthesizes a signal, is re-used as a CDM phase control signal and is input to transmitter 1124.Transmitter 1124 is a Ku band signal with this CDM phase control signal frequency conversion, and the Ku band transmission signal after this frequency conversion is amplified to predetermined transmit power level.This CDM phase control signal of transmitter 1124 output sends to terrestrial broadcasting station BC1 or BC2 as information source by Ku wave band downlink transmission channel from Ku band emission antenna 1125.
Each has following configuration terrestrial broadcasting station BC1 and BC2.Fig. 9 is the configuration block diagram of explanation hop.In Fig. 9, with the identical parts of label representative identical among Fig. 2.
Geostationary satellite SAT is by this CDM phase difference control signal that Ku wave band downlink transmission channel sends, and after being received antenna 144 and receiving, is input to receiver 145, amplifies through low noise, and frequency conversion is the IF signal again.The extended code that correlator 146 utilization is convenient to the phase control signal transmission is carried out despreading to the frequency spectrum of reception IF signal.Wave detector (DET) 147 adopts with the corresponding demodulation method of for example QPSK resulting received signal is carried out detection.The phase control signal that reproduces is input to control circuit 148.
Control circuit 148 is input to a corresponding extended code generator in the extended code generator 121 to 12n with the phase control signal that reproduces by each channel.Extended code generator 121 to 12n with extended code produce start-phase be corrected to phase control signal given timing.Correspondingly, expending modulator 111 is to 11n, and each all utilizes the corresponding extended code generator in the extended code generator 121 to 12n to proofread and correct its generation extended code regularly, expands the frequency spectrum of the broadcast singal of each program.
The expansion modulation signal of these broadcast singals of expending modulator 111 to 11n outputs is synthesized circuit 121 and synthesizes a signal, and is input to modulator 132.133 pairs of these signals of transmitter are modulated, and frequency conversion is the transmission signals of Ku wave band, is amplified to predetermined transmit power level again, sends to geostationary satellite SAT from transmitting antenna 134 then.
Utilize this configuration, in geostationary satellite SAT, can detect the extended code phase difference between these CDM broadcast singals that terrestrial broadcasting station BC1, BC2 and BC3 send, make phase difference be this phase control signal of zero by CDM by multiplexed, and be sent to as terrestrial broadcasting station BC1, the BC2 of information source and each among the BC3.Terrestrial broadcasting station BC1, BC2 and BC3, the phase information that each all sends according to geostationary satellite SAT, the extended code of controlling each channel produces initial timing, thus time-delay will be from installing the transmission timing of the CDM broadcast singal that sends separately.
So terrestrial broadcasting station BC1, BC2 begin to send the CDM broadcast singal with BC3 with different timings.For example, shown in Figure 10 A, terrestrial broadcasting station BC2 begins to send the multiplexed CDM broadcast singal of channel CH11 to CH1n.Then, in the moment of the TD21 that delayed time than the transmission starting point of terrestrial broadcasting station BC2, terrestrial broadcasting station BC1 begins to send the multiplexed CDM broadcast singal of channel CH21 to CH2n.Then, in the moment of the TD23 that delayed time than the transmission starting point of terrestrial broadcasting station BC2, terrestrial broadcasting station BC3 begins to send the multiplexed CDM broadcast singal of channel CH31 to CH3n.
The transmission of these CDM broadcast singals amount of delay is regularly set according to the phase control signal that geostationary satellite SAT sends, like this, on geostationary satellite SAT, relative correlation between these CDM broadcast singals that these terrestrial broadcasting stations BC1, BC2 and BC3 are sent is zero, as mentioned above.Therefore, when geostationary satellite SAT received these CDM broadcast singals that these terrestrial broadcasting stations BC1, BC2 and BC3 sent, can make relative phase difference was zero, shown in Figure 10 B.
Broadcasting receiver receive some between terrestrial broadcasting station BC1, BC2 and BC3 extended code by synchronous CDM broadcast singal.So, the CDM broadcast singal that is sent for one of terrestrial broadcasting station, in case extended code is established synchronously, broadcasting receiver MS is only just separable and reproduce broadcast singal from required terrestrial broadcasting station by the conversion extended code, and to rebulid extended code synchronous and need not CDM broadcast singal for all the other terrestrial broadcasting stations.Therefore, when receive channel will be transformed into the CDM broadcast singal of different terrestrial broadcasting station BC2 transmissions from the CDM broadcast singal that terrestrial broadcasting station BC1 sends, can promptly finish conversion with high response speed.
In view of this phase control of present embodiment, the extended code of a plurality of interchannels that certain terrestrial broadcasting station is sent also can be established on geostationary satellite SAT synchronously.Therefore, even when a plurality of interchannel translated channel that broadcasting receiver MS will be sent at certain terrestrial broadcasting station, only by extended code being transformed into a corresponding extended code, just can be with high response speed translated channel promptly.
As another embodiment of the invention, this broadcasting receiver also can be loaded into the high-speed maneuver device such as on the aircraft.
Usually, in the time of receiving the radiofrequency signal from geostationary satellite SAT aboard, owing between geostationary satellite SAT and the aircraft big relative velocity is arranged, the Doppler drift of receive frequency can appear among the broadcasting receiver MS on the aircraft.In the system of common employing FDM or TDM, the bandwidth of each channel is narrower, is about 10KHz.The Doppler drift of several approximately KHz makes that the required channel of reception is very difficult.Therefore, aircraft loaded this in the system of common employing FDM or TDM used receiver, need the multiple measure that Doppler drift is proofreaied and correct of being used for, the result can cause the device heaviness.
Yet, in adopting the broadcasting-satellite system of CDM as described in the present invention,, the broadcast singal of each channel is extended to for example wide bandwidth of 25MHz by spread spectrum.Therefore, even produce in this case when Doppler drift, and when making receive frequency drift about a few KHz, because this drift value is very little for the frequency band (25MHz) of this channel, thereby the influence of this Doppler drift can be ignored.Therefore, according to present embodiment, employed broadcasting receiver can directly load and be used for aircraft on ground automobile or the device like that, and can make this machine-carried type broadcasting receiver littler and more cheap than conventional receiver apparatus.
Broadcasting receiver used in the CDM broadcasting-satellite system of the present invention can also be loaded on high-speed maneuver device such as the Shikansen.Both just like this, also can utilize a small and exquisite device to realize that high-quality receives, and ignore the influence of Doppler drift.
In addition, when broadcasting receiver is loaded on the train, can utilize train length to carry out so-called diversity reception, for this reason, antenna is installed in respectively saving on the compartment of being isolated from each other, and the received signal of antenna is synthesized.This configuration can realize the reception of better quality.
The present invention is not limited to above-mentioned execution mode, and for the phase locked process of setting up between the extended code, the content of processing, or the configuration of terrestrial broadcasting station, geostationary satellite and broadcasting receiver can make various changes and modifications.
Described in above first to the 6th execution mode, according to a first aspect of the invention, synchronizer is set in predetermined state with the phase relation of the extended code between the broadcast singal of these channels of multiplex machine institute code division multiplex.Perhaps, phase difference detection device detects the phase difference between the extended code of channel signal of the resulting multiplexed broadcast singal of multiplex machine, and notifying device offers broadcasting receiver with the information of the phase difference between the detected expression extended code of phase difference detection device.Utilize this configuration, a kind of broadcasting-satellite system can be provided, this system allows broadcasting receiver promptly to change the channel of multiplexed broadcast singal with high response speed.
Below, by the 7th to the 9th execution mode a second aspect of the present invention is described.
Figure 11 is the configuration schematic diagram of explanation according to the broadcasting-satellite system of the 7th to the 9th execution mode of the present invention.This broadcasting-satellite system comprises as a plurality of terrestrial broadcastings station BC1 of the dispensing device of ground station and BC2 and as a broadcasting satellite SAT of satellite retransmission unit.Each passes through Ka or Ku wave band uplink transmission channels send broadcasting station made and programme signal from editor to this broadcasting satellite SAT terrestrial broadcasting station BC1 and BC2.This broadcasting satellite SAT is managed by Satellite Tracking control desk STCC, so that remain on a precalculated position on the geostationary orbit in the sky, equator.
As shown in figure 12, broadcasting satellite SAT constitutes by being fixed on the satellite main body 21 as the solar panel 22 of power supply and 23, Ka or Ku wave band antenna 24 and a S-band antenna 25.This Ka or Ku wave band antenna 24 comprise that a diameter is for example speculum 241 and a primary radiator 242 of 2.5m level.This S-band antenna 25 comprises that a diameter is for example speculum 251 and a primary radiator group 252 of 8 to 15m levels.
After the broadcast singal that terrestrial broadcasting station BC1 or BC2 send is received by Ka or Ku wave band antenna 24, be installed in signal processing unit in the satellite main body 21 and separate to be in harmonious proportion and amplify, and be transformed to the signal of a S-band.Broadcast singal after the conversion sends to service area by the S-band downlink transmission channel from S-band antenna 25.
In this service area, be contained in the fixed station in office for example or the family, perhaps, receive broadcast singal, as shown in figure 11 from broadcasting satellite SAT such as the mobile station MS of vehicular receiver or portable terminal.
In the S-band downlink transmission channel, only utilize code division multiplex or, carry out multiplexed for for example a plurality of channels that mostly are most 900 channels of 64 to 256Kbps/ channels transmission rate not only with code division multiplex but also with time division multiplexing or frequency division multiplexing.In order to send vision signal, adopt MPEG4 (active images expert group 4) as method for video coding with a certain channel.
(the 7th execution mode)
Figure 13 is the allocation plan of explanation according to the satellite broadcast receiver that is used as receiver terminal device of the 7th execution mode of the present invention.This satellite broadcast receiver is used for broadcasting-satellite system as shown in figure 11.
As shown in figure 13, the satellite broadcast receiver of present embodiment comprises two antennas 211 and 212, signal synthesizers 213, Rake receiver 214, audio/video separation circuit part 215, audio decoder 216, loud speaker 217, Video Decoder 218,219 and control sections 220 of LCD (LCD).
These two antennas 211 and 212 all receive the radio wave that arrives by downlink transmission channel, and produce the corresponding signal of telecommunication (transmission signals ).Antenna 211 and 212 preferably shaft-like (rod) antenna also as far as possible away from each other.
213 pairs of antennas 211 of signal synthesizer and 212 resulting transmission signals synthesize, and the signal after synthesizing is input to Rake receiver 214.Transmission signals after signal synthesizer 213 synthesizes is successively through known processing, for example, down-convert to IF or base band frequency, be converted to digital signal, the frequency spectrum despreading in a plurality of systems, integrated on a code-element period in a plurality of systems, the integrated result's of these of a plurality of systems is synthetic, and deinterleave is handled, Viterbi decoding, or error-correcting decoding, thereby obtain receiving data.
Control section 220 carries out tuning control and audio/video separation circuit part 215 is carried out separating controlling Rake receiver 214 according to the expectant control program.
Figure 14 is the antenna 211 of explanation on the tracker action and the view of an example of 212 the situation that is provided with.
In Figure 14, antenna 211 and 212 is installed near the left-front corner of tracker action 221 (automobile among Figure 14) respectively and near the right back angle.Because automobile rectangular shaped almost when top view, thereby antenna 211 and 212 lays respectively near the diagonal angle of this rectangle.Direct of travel (direction of arrow A indication among Figure 14) at tracker action 221 is gone up with on the direction vertical with direct of travel (direction of arrow B indication among Figure 14), and antenna 211 and 212 remedies mutually.
Utilize this configuration, unless barrier 222 appears between the tracker action 221 and this broadcasting satellite SAT of the satellite broadcast receiver that present embodiment is housed, otherwise antenna 211 and 212 all can receive the radio wave from broadcasting satellite SAT, shown in Figure 15 A.
Simultaneously, antenna 211 and 212 all can obtain a transmission signals, although these two transmission signals have a phase difference.
Yet, because 213 pairs of antennas 211 of signal synthesizer and 212 resulting transmission signals synthesize, and the signal after will synthesizing is input to Rake receiver 214, so in Rake receiver 214, Rake is received, antenna 211 is used as the different transmission signals that arrive by different paths with 212 resulting transmission signals, that is, utilize the path diversity effect to receive with high S/N ratio.In other words, signal synthesizer 213 is not finished the phase Matching Processing of antenna 211 and 212 resulting transmission signals, and has only carried out simple synthetic.
Suppose that the tracker action 221 shown in Figure 15 A in the situation advances to the situation shown in Figure 15 B with the direct of travel shown in Figure 15 A.Because barrier 222 has blocked the radio wave that will arrive antenna 211, so antenna 211 does not receive this radio wave.
Yet in this case, barrier 222 does not shelter from and will arrive the radio wave of antenna 212.Because antenna 212 can receive this radio wave, therefore receive operation and do not interrupt.
After tracker action 221 shown in Figure 15 B in the situation is further advanced with the direct of travel shown in Figure 15 B, barrier 222 has blocked will arrive the radio wave of antenna 212, thereby make antenna 212 not receive radio wave, shown in Figure 15 C.Even like this, as long as the width of barrier 222 less than between antenna 211 and the antenna 212 along the spacing of tracker action 221 direct of travels, blocked the radio wave that will arrive antenna 212 even work as barrier 222 so, barrier 222 does not influence the radio wave that will arrive antenna 211 yet.Therefore, shown in Figure 15 C, antenna 211 can receive this radio wave, receives operation and does not interrupt.
Suppose that barrier 222 only partly appears at the top of the direction vertical with tracker action 221 direct of travels, shown in Figure 16 A and 16B.In this case, blocked the radio wave that will arrive an antenna even work as barrier 222, this radio wave also can arrive another antenna, therefore receives operation and does not interrupt.
In this case, even surpass between antenna 211 and the antenna 212 along the spacing of tracker action 221 direct of travels along the length of tracker action 221 direct of travels when barrier 222, receive operation and also do not interrupt.
As long as the width of barrier 222 less than between antenna 211 and the antenna 212 along the spacing of tracker action 221 direct of travels, perhaps barrier 222 only partly appears at the top of the direction vertical with tracker action 221 direct of travels, even when tracker action 221 on barrier 222 times through out-of-date, radio wave also can be received all the time, and instantaneous interruption can not occur.
Even between the width of barrier 222 is greater than antenna 211 and antenna 212 apart from the time be not shortened because antenna 211 and antenna 212 all receive the time of this radio wave, therefore also can be shortened instantaneous break period.
A kind of spatial diversity system (as the system in the present embodiment) that utilizes a plurality of antennas to receive is well-known.Yet this known spatial diversity system purpose is in order to reduce the influence of the decline that multipath transmission causes, and this system for the present embodiment of utilizing the multipath transmission there is no need.This configuration as a feature of present embodiment may look to be similar to this known spatial diversity system.Yet,, therefore do not reduce the influence that multipath transmits the decline that causes because present embodiment allows to utilize really multipath signal to receive with high S/N ratio.That is to say,, realize the configuration of present embodiment according to the different technological concept of technological concept in a kind of and this spatial diversity system.
(the 8th execution mode)
Figure 18 is the allocation plan of explanation according to the satellite broadcast receiver that is used as receiver terminal device of the 8th execution mode of the present invention.In Figure 18, the identical parts of label representative with identical among Figure 13 are not described in detail in this.
This satellite broadcast receiver is used for broadcasting-satellite system as shown in figure 11.
As shown in figure 18, the satellite broadcast receiver of present embodiment comprises an antenna 211, Rake receiver 214, audio/video separation circuit part 215, audio decoder 216, loud speaker 217, Video Decoder 218, LCD 219, control section 220, signal buffer 225, instantaneous interruption (hit) determinant 226 and a dropout part compensating circuit 227.
Signal buffer 225 is input to audio/video separation circuit part 215 with these data again with Rake receiver 214 resulting reception storage and one period scheduled time of maintenance.This signal buffer 225 is also dealt with the service area that receives data by dropout part compensating circuit 227 usefulness.
The working condition (for example, receiving the output situation of data) of instantaneous interruption determinant 226 monitoring Rake receivers 214 also detects instantaneous interruption.In case detect instantaneous interruption, instantaneous interruption determinant 226 just is notified to it dropout part compensating circuit 227.
When instantaneous interruption determinant 226 detected instantaneous interruption, this dropout part compensating circuit 227 just compensated processing to receiving data (lost part).
The work that below description is had the satellite broadcast receiver of above-mentioned configuration.
If the radio wave that broadcasting satellite SAT sends normally arrives antenna 211, then Rake receiver 214 normal extraction from antenna 211 resulting transmission signals receives data.Signal buffer 225 storage and keep Rake receiver 214 resulting reception data is followed and is whenever spent one period scheduled time these data are input to audio/video separation circuit part 215.If radio wave normally and continuously arrives antenna 211, then instantaneous interruption determinant 226 detects less than instantaneous interruption, and the reception data that dropout part compensating circuit 227 is not stored signal buffer 225 are carried out any processing.Therefore, these reception data only are cushioned 225 one period scheduled time of time-delay of device.
Suppose that the tracker action that the satellite broadcast receiver of present embodiment is housed is being advanced, and have a barrier to enter between broadcasting satellite SAT and the antenna 211.The radio wave that broadcasting satellite SAT sends is blocked by this barrier, and can not arrive antenna 211.At this moment, no longer include transmission signals and be input to Rake receiver 214, the reception data indication no signal condition of Rake receiver 214 outputs.
Instantaneous interruption determinant 226 detects instantaneous interruption, and it is notified to dropout part compensating circuit 227.In view of the above, dropout part compensating circuit 227, the normal part of storing and keeping according to signal buffer 225 receive tentation data around this lost part in the data (as with certain partial data of this lost part strong correlation), adopt the method that for example copies or estimate these data, produce the offset data of this lost part.Dropout part compensating circuit 227 is with the offset data write signal buffer 225 that is produced, to compensate this lost part.
As mentioned above, according to present embodiment, even when radio wave is blocked by a barrier and causes instantaneous interruption, also can compensate, thereby formation is without any the reception data of lost part according to the lost part of the reception data around the normal receiving unit to the reception data that this instantaneous interruption caused.Utilize this configuration, can make the decline of the quality of reception reduce to minimum.
(the 9th execution mode)
Figure 19 is the allocation plan of explanation according to the broadcasting-satellite system of the 9th execution mode of the present invention.In Figure 19, the identical parts of label representative with identical in Figure 13 and 18 are not described in detail in this.
The whole configuration of this broadcasting-satellite system is identical with the configuration of broadcasting-satellite system as shown in figure 11.Figure 19 show among Figure 11 mobile station MS loaded as a certain satellite broadcast receiver 2100 of receiver terminal device and be contained in the configuration of a certain satellite broadcasting device 2200 among the broadcasting station BC of Figure 11.
As shown in figure 19, the satellite broadcast receiver 2100 of present embodiment comprises an antenna 211, audio/video separation circuit part 215, audio decoder 216, loud speaker 217, Video Decoder 218, LCD 219, control section 220, Rake receiver 228, signal buffer 229, dropout part compensating circuit 230, instantaneous interruption determinant 231, re-send request may processing section 232, a transmitter 233 and an antenna 234.
In Rake receiver 228,, carry out reception in the Rake receiver 214 with the 7th execution mode and handle same reception and handle, thereby obtain receiving data antenna 211 resulting transmission signals.Yet Rake receiver 228 extracts the reception data relevant with arbitrary broadcast channel Bch, extracts and the reception data that predetermined retransmission channel Rch is relevant concurrently.The reception data relevant with this arbitrary broadcast channel Bch are input to signal buffer 229.The reception data relevant with this retransmission channel Rch are input to dropout part compensating circuit 230.
The reception data relevant with this broadcast channel Bch are stored by signal buffer 229 and are kept one period scheduled time, promptly by one period scheduled time of time-delay, are input to audio/video separation circuit part 215 then.The reception data relevant with this retransmission channel Rch by dropout part compensating circuit 230 in order to the compensating missing part.
When instantaneous interruption determinant 231 detected instantaneous interruption, this dropout part compensating circuit 230 utilized the reception data relevant with this retransmission channel Rch, compensated processing to receiving data (lost part).
The working condition (for example, the output situation of the reception data relevant with this broadcast channel Bch) of instantaneous interruption determinant 231 monitoring Rake receivers 228 also detects instantaneous interruption.In case detect instantaneous interruption, instantaneous interruption determinant 231 just is notified to it dropout part compensating circuit 230 and re-send request may processing section 232.
When instantaneous interruption determinant 231 detected instantaneous interruption, this re-send request may processing section 232 produced the re-send request may data, is used to ask the repeating transmission of this lost part.The re-send request may data that re-send request may processing section 232 produces are converted into a scheduled transmission signal that will be launched machine 233 wireless transmissions, and then send to satellite broadcasting device 2200 by a request channel Dch from antenna 234.
The satellite broadcasting device 2200 of present embodiment comprises a transmitter 235, storage area 236, retransmission process part 237, antenna 238 and 239 and receivers 240.
In satellite broadcasting device 2200, the transmission data that transmission data unit (not shown) or equipment like that produce are input to transmitter 235, are input to storage area 236 simultaneously, and are stored and keep as the transmission data that have been sent out.
In transmitter 235, these transmission data through such as error correction coding, convolutional encoding, staggered processing, spread processing, be converted to analog signal, up-convert to the frequency of broadcast channel Bch or power amplification etc. and handle after, send from antenna 238 then, send to satellite broadcast receiver 2100 via broadcasting satellite SAT.
When the transmission signals that sends by this request channel Dch when antenna 239 is input to receiver 240, receiver 240 receives these transmission signals, and reproduces the re-send request may data.These re-send request may data are input to retransmission process part 237.Retransmission process part 237 is extracted the transmission data of this re-send request may data representative part from storage area 236, produce the retransmission data that comprises these transmission data, and this retransmission data is input to transmitter 235.
In transmitter 235, this retransmission data through such as error correction coding, convolutional encoding, staggered processing, spread processing, be converted to analog signal, up-convert to the frequency of retransmission channel Rch or power amplification etc. and handle after, send from antenna 238 then, send to satellite broadcast receiver 2100 via broadcasting satellite SAT.
The work that below description is had the broadcasting-satellite system of above-mentioned configuration.
If the radio wave that broadcasting satellite SAT sends normally arrives antenna 211, then Rake receiver 228 normal extraction from antenna 211 resulting transmission signals receives data.Signal buffer 229 storage and keep the Rake receiver 228 resulting reception data relevant with broadcast channel Bch is followed and is whenever spent one period scheduled time these data are input to audio/video separation circuit part 215.If radio wave normally and continuously arrives antenna 211, then instantaneous interruption determinant 231 detects less than instantaneous interruption, and the reception data that dropout part compensating circuit 230 is not stored signal buffer 229 are handled.Therefore, these relevant with broadcast channel Bch reception data only are cushioned 229 one period scheduled time of time-delay of device.
In this case, re-send request may processing section 232 does not produce the re-send request may data.When all the other satellite broadcast receivers all are in above-mentioned normal condition, there is not transmission signals to send from request channel Dch.Because of a little, receiver 240 does not obtain the re-send request may data, does not have the re-send request may data to be input to retransmission process part 237 yet.So retransmission process part 237 can not produce and export retransmission data.
Suppose that the tracker action that the satellite broadcast receiver 2100 of present embodiment is housed is being advanced, and have a barrier to enter between broadcasting satellite SAT and the antenna 211.The radio wave that broadcasting satellite SAT sends is blocked by this barrier, and can not arrive antenna 211.At this moment, no longer include transmission signals and be input to Rake receiver 288, the reception data indication no signal condition of Rake receiver 288 outputs.
Instantaneous interruption determinant 231 detects instantaneous interruption, and it is notified to dropout part compensating circuit 230 and re-send request may processing section 232.
In view of the above, re-send request may processing section 232 produces the re-send request may data, is used to ask the repeating transmission of the transmission data of this lost part that instantaneous interruption causes.These re-send request may data arrive retransmission process part 237 via transmitter 233, antenna 234, request channel Dch, antenna 239 and receiver 240.
In case receive the re-send request may data, retransmission process part 237 is extracted the transmission data of this re-send request may data institute requested part from storage area 236, and produces the retransmission data that comprises these transmission data.This retransmission data is via transmitter 235, antenna 238, retransmission channel Rch, antenna 211 and Rake receiver 228, arriving signal lost part compensating circuit 230.In view of the above, dropout part compensating circuit 230 is with this retransmission data write signal buffer 229, to compensate this lost part.
As mentioned above, according to present embodiment, even when radio wave is blocked by a certain barrier and causes instantaneous interruption, also can be as the satellite broadcasting device 2200 of satellite retransmission unit according to request as the satellite broadcast receiver 2100 of receiver terminal device, retransmit because this instantaneous interruption and the transmission data of the lost part that in the reception data, caused.Satellite broadcast receiver 2100 utilizes this retransmission data, this lost part is compensated, thereby formation is without any the reception data of lost part.Utilize this configuration, can make the decline of the quality of reception reduce to minimum.
The present invention is not limited to above-mentioned execution mode.For example, in the above-described embodiment, the present invention is applied to used satellite broadcast receiver of broadcasting-satellite system or satellite broadcasting device.Yet the present invention also can be applicable to other wireless communication system.
In the 7th execution mode, band spectrum modulation is used as multipath transmission modulation.Yet the present invention also can be applicable to employed radio communication device, for example used multi-carrier modulation among the OFDM (OFDM) in the system of a certain other modulation system of employing.
The 7th execution mode also can be applicable to use the situation of three or three above antennas.
In the 7th execution mode, antenna 211 and antenna 212 are installed near the left-front corner of tracker action 221 respectively and near the right back angle.Yet this configuration is not limited thereto.
In the 7th execution mode, an automobile is used as an example of tracker action 221.Yet the wireless receiver as receiver terminal device of the present invention also can be installed on other tracker action, such as rows of cars.For train, antenna 211 and antenna 212 can be installed in the place, diagonal angle that respectively saves the compartment.Perhaps, these antenna can be installed in the front end in first segment compartment and the end in final section compartment.
The the 8th or the 9th execution mode can combine the configuration and the signal synthesizer 213 of the antenna in the 7th execution mode 211 and 212.
Within the spirit and scope of the present invention, can make various changes and modifications.
Described in above the 7th to the 9th execution mode, according to a second aspect of the invention, (this system is used for the transmission signals that wireless transmission is modulated by the predetermined modulation mode at a kind of wireless communication system, to adapt to the multipath transmission of using direct wave and indirect wave) in the employed wireless receiver, with the resulting composite signal in the synthetic back of the resulting signal of a plurality of antennas that are separated from each other, handle by the multipath reception of being scheduled to signal synthetic apparatus for receiving system.
As another kind of form, at a kind of employed wireless receiver of wireless communication system that is used for wireless transmission scheduled transmission signal, storage device is transferred data to one period scheduled time of few storage with what this receiving system demodulated from the transmission signals of this wireless transmission.Instantaneous interruption in the transmission signals that instantaneous this receiving system of interruption detection arrangement monitors is received.Compensation arrangement is according to the transmission data of being stored in the storage device, or the transmission data that demodulated in the transmission signals retransmitted of the re-send request may of utilizing the retransmission apparatus from this radio broadcasting device to send according to the re-send request may device, to compensating with the corresponding transmission data of the transmission signals part that is detected instantaneous interruption.
Utilize this configuration, can make the minimum that influences of instantaneous interruption that barrier produces, and obtain the satisfied quality of reception.
Below, by the tenth to the 16 execution mode a third aspect of the present invention is described.
(the tenth execution mode)
Figure 20 is the schematic diagram of explanation according to the broadcasting-satellite system with calking function of the tenth execution mode of the present invention.
This broadcasting-satellite system comprises a plurality of terrestrial broadcastings station (VSAT) BC1 and BC2 or the feeder link station as the dispensing device of ground station, as a geostationary satellite SAT1 and Satellite Tracking control desk STCC of satellite retransmission unit.
Terrestrial broadcasting station (VSAT) BC1 and BC2 or feeder link station, each sends broadcasting station made and editor's programme information all with Ka wave band (26.5 to 40GHz) or Ku wave band (12.5 to 18GHz) to this geostationary satellite SAT1 by uplink transmission channels.
Ka wave band that it is the 2.5m level that geostationary satellite SAT1 is equipped with a diameter or Ku wave band antenna and S-band (for example 2.6GHz) antenna that diameter is the 15m level.The multiplexed broadcast singal that one of these broadcasting stations (VSAT) BC1 and BC2 or feeder link station are sent by Ka or reception of Ku wave band antenna and amplification, is transformed to the signal of S-band again.Broadcast singal after the conversion, with S-band by downlink transmission channel from the S-band antenna transmission to service area.Be contained in the ul transmissions antenna on the geostationary satellite SAT1, its diameter can be less than the 2.5m level.This S-band antenna, its diameter also can not be 15m level but 8m level.
Satellite Tracking control desk STCC monitors and controls the operating state of this geostationary satellite SAT1.
In service area, be fixedly mounted in the broadcasting receiver (not shown) in office for example or the family or be contained on the automobile or, receive with S-band and send to broadcast singal the S-band downlink transmission channel from geostationary satellite SAT1 as the movable radio receiver MS that portable equipment is adorned.In the S-band downlink transmission channel, transmission rate is that a plurality of channels that mostly are 900 channels most of 64 to 256Kbps/ channels are by multiplexed.In order to send vision signal, adopt MPEG4 (active images expert group 4) as method for video coding with a certain channel.
In this system of the tenth execution mode, calking device GFa is installed on the top of high-rise for example or tower seat.Calking device GFa reception and amplification are from the broadcast singal of geostationary satellite SAT1, then, the broadcast singal that is received is forwarded to the zone from the broadcast singal of this geostationary satellite SAT1 of not receiving of building or behind like that, and this signal frequency remains unchanged simultaneously.This calking device GFa has following configuration.
Figure 21 is the configuration block diagram of this calking device GFa of explanation.The broadcast singal that geostationary satellite SAT1 sends is input to input filter 312 after being received antenna 311 receptions.312 selected a certain predetermined pass band of input filter, 313 pairs of these signals of low noise amplifier amplify then.Broadcast singal after the amplification is amplified by power amplifier 314, and be output filter 315 and be limited in a certain predetermined pass band, send to the blind area from transmitting antenna 316 then, for example a certain building zone behind that do not arrive of the direct wave of geostationary satellite SAT1.As output antenna 316, can adopt a kind of directional antenna, so that the broadcast signal transmission scope is defined in the blind area of the direct wave that does not receive this geostationary satellite SAT1.
Utilize this configuration, the broadcast singal that each station in these terrestrial broadcasting station BC1 and BC2 or the feeder link station is sent, send to geostationary satellite SAT1 by Ka or Ku wave band uplink transmission channels, send to service area by the S-band downlink transmission channel from geostationary satellite SAT1 again, and received by the broadcasting receiver MS in this service area.Because this geostationary satellite SAT1 has the major diameter S-band antenna of a 15m level, and S-band almost can not be subjected to the influence of rain attenuation,, each broadcasting receiver MS has the strong broadcast singal of enough strong cohesiveness ends so receiving.Therefore, broadcasting receiver MS can be with a kind of small and exquisite flagpole antenna or flat plane antenna receiving broadcast signal.
Yet, be in the broadcasting receiver MS in the blind area of a certain building direct wave that does not receive geostationary satellite SAT1 behind, can not directly receive this broadcast singal.The broadcast singal that geostationary satellite SAT1 sends is forwarded and sends to this building blind area behind after being received by calking device GFa again.Utilize this configuration, this building broadcasting receiver MS behind also can receive this broadcast singal.
This broadcast singal that calking device GFa transmits and sends, its frequency are set to the same frequency of broadcast singal that sends with geostationary satellite SAT1.Therefore, building broadcasting receiver MS behind as long as it has a receiver that is used to receive the broadcast singal that geostationary satellite SAT1 sends, just can receive this broadcast singal of self-interstitial device GFa, and need not to adopt special receiver.
Calking device GFa sends to building blind area behind with this broadcast singal, utilizes directional antenna to limit broadcasting area simultaneously.Even work as this signal that calking device GFa is sent, when its frequency was set to the same frequency of the signal that sends with geostationary satellite SAT1, the signal that also can avoid sending to around the building blind area behind with geostationary satellite SAT1 from the transmission signals of calking device GFa interfered with each other.So broadcasting receiver MS is receiving broadcast signal in high quality in any zone.
(the 11 execution mode)
Usually, when the geostationary satellite on the geostationary orbit that is positioned at the sky, equator sent radiofrequency signal, barrier can block the radio wave of north side such as ground building.In the 11 execution mode of the present invention, what paid close attention to is exactly this point, in the zone that building stands in great numbers, the calking device should to the east of-Xi always transmits and sends the directional broadcasting signal.
Figure 22 and 23 is the schematic diagrames that are used to illustrate present embodiment.In the commerce or affairs district that the street architecture thing is closely adjacent to each other, one can not directly receive from as the banded blind area of the radiofrequency signal of the geostationary satellite SAT1 of satellite retransmission unit to the east of the north side of building-Xi is to extension, shown in the dashed area among Figure 22.
In the present embodiment, a calking device GFb for example is installed in the place, grand cross crossing that can directly receive from the broadcast singal of geostationary satellite SAT1.For this calking device GFb is installed, for example can on the street of being laid, hold up a pillar 345 (post), and this calking device GFb is fixed on this pillar 345.
Calking device GFb has a main body 342, and this main body provides transmission/receiving circuit part for example low noise amplifier and power amplifier.One is used to receive the top that is fixed on main body 342 from the antenna 341 of the broadcast singal of geostationary satellite SAT.In addition, forwarding antenna 343 and 344 is fixed on two sides of main body 342, and opposite each other.Forwarding antenna 343 and 344 is installed like this, be for to the east of-Xi transmits radiofrequency signal to sending one.
But if existing pillar (for example, road sign post, beacon perhaps is erected at the public bar on the pavement or on like that) is arranged the time spent, then calking device GFb can be installed on this existing pillar, and need not to provide special-purpose pillar 345.
In the present embodiment, the broadcast singal that geostationary satellite SAT1 is sent is received by calking device GFb and amplifies, then to the east of forwarding antenna 343 and 344-Xi is to sending, shown in Figure 22 and 23.Therefore, utilize a few calking device, just can cover a slit region that can not directly receive the broadcast singal that geostationary satellite SAT1 sent effectively.
Calking device GFb is not limited to satellite earth antenna 341 and forwarding antenna 343 and 344 and entirely is fixed on configuration on the main body 342.For example, the main body 342 with satellite earth antenna 341 is installed on the top that for example can receive more reliably from the building of the signal of geostationary satellite SAT1.Forwarding antenna 343 and 344 is fixed on road sign post, beacon or is erected on the public bar of certain crossroad.Link to each other by coaxial cable between main body 342 and forwarding antenna 343 and 344.Utilize this configuration,, can provide a kind of calking device with high receptivity though be connected a bit trouble between main body 342 and forwarding antenna 343 and 344.As antenna 343 and 344, can adopt small and exquisite guard antenna.
In order to cover the banded blind area of a wide region, a calking device GFc is installed on the top of eminence such as building, and as shown in figure 24, signal sends directionally to this blind area from this top.Figure 24 shows the situation of utilizing this configuration to cover the wide blind area of tens km to km.
According to the shape of blind area, calking device GFd can be installed in the tower seat or suchlike above, as shown in figure 25, broadcast singal can be transmitted from the calking device GFd that adopts non-directional antenna and send.Utilize this configuration, can cover broad circular blind area.
(the 12 execution mode)
In the 12 execution mode of the present invention, send to a plurality of channel signals of a satellite from a terrestrial broadcasting station as the dispensing device of ground station, by CDM (code division multiplex) by multiplexed.The calking device amplifies this multiplexed CDM broadcast singal that arrives through this satellite, and with this signal forwarding and the slit region that sends to building or behind like that.
Figure 26 is the configuration block diagram of the hop among explanation terrestrial broadcasting station BC1 or the BC2.The broadcast singal of a plurality of programs that a certain circuit (not shown) is edited (being N program among Figure 26) is input to modulator 351 respectively to 35n.The different extended code that modulator 351 to 35n utilizes extended code generator 361 to 36n to produce is carried out band spectrum modulation to these broadcast singals respectively.Broadcast singal after modulator 351 to the 35n band spectrum modulation is synthesized device 371 and synthesizes a multiplexed broadcast singal, and is input to modulator 372.Modulator 372 adopts such as the digital modulation of QPSK or QAM and further modulates this multiplexed broadcast singal.It is Ka or Ku waveband radio frequency signal that multiplexed broadcast singal after the modulation is launched machine 373 frequency conversions.This radiofrequency signal is amplified to predetermined transmit power level, sends to this geostationary satellite from antenna 374 then.
Geostationary satellite is transformed to the S-band signal with the multiplexed broadcast singal of CDM that terrestrial broadcasting station BC1 or BC2 or feeder link station are sent, and again this signal is amplified to predetermined power level, then this signal is sent to the ground service district.
The calking device receives the multiple all broadcast singals of CDM multichannel that geostationary satellite sends, and this received signal is amplified to the required transmitted power level of calking, and this signal is sent to the blind area.
Broadcasting receiver MS has following configuration.Figure 27 is the configuration block diagram of this broadcasting receiver of explanation MS.In Figure 27, the multiplexed broadcast singal of CDM that geostationary satellite and calking device are sent is input to receiver 322 after being received by antenna 321.Receiver 322 adopts Rakes to receive, receive and reproduce in the multiplexed broadcast singal of CDM with the specified corresponding broadcast singal of channel of user, the received signal after the reproduction is input to audio/video separation circuit part 323.
The received signal that audio/video split circuit 323 will reproduce is separated into voice data, video data and such as the additional data of text data.Isolated reception voice data is input to audio decoder 324.Institute's receiving video signals is input to Video Decoder 326.Additional data is input to additional data decoder 328.Audio decoder 324 receives voice data decoding back reproducing audio signal with institute, and this audio signal is exported from loud speaker 325 after amplifying.Video Decoder 326 for example utilizes MPEG4 with institute's receiving video signals decoding, and decoded vision signal is input to LCD 327, thereby makes LCD 327 show these vision signals.Additional data decoder 328 will be decoded such as the additional data of text data, and make LCD 327 show this decoded data in display video signal.
Receiver 322 has following configuration.Figure 28 is the configuration block diagram of this receiver 322 of explanation.Radio-circuit 328 will be a fundamental frequency from radio frequency down-conversion from the multiplexed broadcast singal of CDM of geostationary satellite and calking device.Analog/digital converter (A/D) 329 with the predetermined sample cycle with institute's receiving baseband signal digitlization after, be input to a scanning receiver 330 and three digital data demodulators 331,332 and 333.
The pilot signal that scanning receiver 330 receives and demodulation terrestrial broadcasting station BC1 or BC2 are sent, the configuration of each of the configuration of this receiver and the following digital data demodulator that will describe 331,332 and 333 is basic identical.
Digital data demodulator 331,332 and 333, each all adopts Rake to receive, from from the multiplexed broadcast singal of the CDM of geostationary satellite or come the multiplexed broadcast singal of CDM of self-interstitial device, demodulate one with the corresponding broadcast singal of the specified channel of user.
Specifically, digital data demodulator 331,332 and 333 sampling clocks according to A/D converter 329 produce clock separately, and work independently according to clock separately.Each digital data demodulator comprises initial part, a clock tracing part and the data demodulation part of catching.These digital demodulation parts all comprise phase compensation part 3311,3321 and 3331, multiplier 3312,3322 and 3332, PN code generator 3313,3323 and 3333, and accumulator 3314,3324 and 3334 separately.
The received signal of 3311,3321 and 3331 pairs of path diversities of phase compensation part is carried out phase compensation.Multiplier 3312,3322 and 3332 is respectively with phase compensation part 3311,3321 and received signals and the PN code generator 3313,3323 of 3331 outputs and multiplying each other with the corresponding PN sign indicating number of specified channel of 3333 generations, thereby with the frequency spectrum despreading of received signal.Accumulator 3314,3324 and 3334 carries out integration to the received signal of exporting after multiplier 3312,3322 and 3332 despreadings respectively.Integration output is imported into code element synthesizer 334.
The integration output of the received signals of code element synthesizer 334 demodulator 331,332 and 333 outputs to digital data synthesize with the reproduction data component, will reproduce data component again and be input to audio/video separation circuit part 323 shown in Figure 27.
Control section 335 has a microcomputer as main control part, and as receiving relevant controlled function with Rake, it also has a path position (path position) checkout gear and a PN sign indicating number produces control device.The pilot signal that this path position checkout gear is received according to scanning receiver 32 detects path position and the path position that comes the signal of self-interstitial device from the signal of geostationary satellite SAT.The PN sign indicating number produces control device according to the path position testing result, calculating optimum PN address value, and this PN address value is input to PN code generator 3313,3323 and 3333 in three digital data demodulators 331,332 and 333.Utilize this operation, can changeably control the chip phase of PN code generator 3313,3323 and the 3333 PN sign indicating numbers that produce.
When use has the broadcasting receiver MS of as above configuration, just look like that receiving multipath signals is such, can receive, reproduce and the multiplexed broadcast singal of CDM of synthetic geostationary satellite transmission and the multiplexed broadcast singal of CDM that the calking device is transmitted.In other words, can adopt path diversity to receive the multiplexed broadcast singal of CDM of geostationary satellite transmission and the multiplexed broadcast singal of CDM that the calking device is transmitted and sent.Therefore, even not only can receive from the multiplexed broadcast singal of the CDM of geostationary satellite but also can receive in the zone of the signal that the calking device transmits and send the time, can realize that also high-quality receives and can not cause interference between these two kinds of signals when this broadcasting receiver MS is in.
According to present embodiment, owing to needn't consider to cause from the multiplexed broadcast singal of the CDM of geostationary satellite and calking device and transmit and the interference between signals of transmission because of having same frequency, thereby needn't strict adjust the sensing of the signal that the calking device will transmit, therefore, this calking device can easily be installed.
(the 13 execution mode)
In the 13 execution mode of the present invention, two geostationary satellites, promptly a main satellite and a backup satellite are on the same geostationary orbit and a certain preset space length of being separated by.These two geostationary satellites send to service area with identical broadcast singal synchronously with one another.This configuration even allow to be in broadcasting receiver MS in the zone of the broadcast singal that does not receive autonomous satellite and receive broadcast singal from backup satellite.
Figure 29 is the schematic diagram of explanation according to the broadcasting-satellite system of present embodiment.In Figure 29, two geostationary satellite SATa and SATb is on this geostationary orbit and a certain preset space length of being separated by.This two geostationary satellite SATa and SATb, one as main satellite, and another is as backup satellite.Even when main satellite operate as normal, backup satellite neither be in wait state, but send and the same broadcast singal of broadcast singal that main satellite is sent out.
Utilize this configuration, be in, can receive broadcast singal RSb, as shown in figure 26 from backup satellite SATb because of building does not receive mobile station MS in the zone of broadcast singal RSa of autonomous satellite SATa.Otherwise, be in the mobile station MS that does not receive from the zone of the broadcast singal RSb of backup satellite SATb, can receive the broadcast singal RSa of autonomous satellite SATa.Therefore, according to present embodiment, need not to install on the ground any calking device and just can eliminate this slit region.In addition, in the present embodiment, utilize an existing backup satellite just can realize this calking effect.Therefore, new satellite needn't be launched, just this system can be realized economically.
(the 14 execution mode)
In the 14 execution mode of the present invention, the broadcast singal that sends as the terrestrial broadcasting station or the feeder link station of the dispensing device of ground station, be used as on the geostationary satellite of satellite retransmission unit, by frequency conversion is second broadcast singal that has first broadcast singal that is suitable for broadcasting receiver of mutual different frequency and be suitable for the calking device, is sent out then.After the calking device receives second broadcast singal, be the broadcast singal identical, then the blind area is transmitted and sent to this broadcast singal with the frequency of first broadcast singal with this signal transformation.
Figure 30 is the schematic diagram according to the broadcasting-satellite system of present embodiment.Figure 31 shows the configuration of the transponder of the geostationary satellite SAT2 in this system.Figure 32 shows the configuration of calking device.
On the transponder of geostationary satellite SAT2, the Ku wave band up link broadcast singal UL (frequency is fua) that terrestrial broadcasting station BC is sent amplifies through low noise amplifier 382 after being received antenna 381 receptions, is input to signal distributor 383 again.Signal distributor 383 is distributed to two systems with the up link broadcast singal.
One of them broadcast singal is S-band radiofrequency signal (frequency is fs) by 384 frequency conversions of first frequency converter, be amplified to as the fixed station of receiver terminal device or the broadcasting receiver of mobile station MS by first power amplifier 386 again and receive required transmitted power level, send to the ground service district as the first downlink broadcast signals DLa from S-band transmitting antenna 388 then.
On the other hand, wherein the broadcast singal that another distributed is Ku waveband radio frequency signal (frequency is fub) by 388 frequency conversions of second frequency converter, be amplified to calking device GFe by second power amplifier 387 again and receive required transmitted power level, send from Ku band emission antenna 389 as the second downlink broadcast signals DLb then.Though the second downlink broadcast signals DLb and up link broadcast singal UL are sent out with the Ku wave band, their frequency difference.For example, the frequency f ub of the second downlink broadcast signals DLb is set at 14GHz, and the frequency f ua of up link broadcast singal UL is set at 12GHz.
In calking device GFe, the second broadcast singal DLb that geostationary satellite SAT2 is sent amplifies through low noise amplifier 392 after being received by antenna 391, is input to frequency converter 393 again.Frequency converter 393 is S-band radiofrequency signal (frequency is fs) with the second downlink broadcast signals frequency conversion that is received, and promptly is the identical radiofrequency signal of frequency of the first downlink broadcast signals DLa that broadcasting receiver sent with geostationary satellite SAT2.Frequency conversion is the broadcast singal of S-band, is amplified to big or small corresponding transmission power level with calking area of coverage GE by power amplifier 394, transmits broadcast singal DLg as one then and sends to this calking area of coverage GE from transmitting antenna 395.
Utilizing this configuration, is different from the frequency of the frequency of the downlink broadcast signals DLb of geostationary satellite SAT2 and the forwarding broadcast singal DLg that sends to calking area of coverage GE.Therefore, this calking device GFe can easily avoid the forwarding broadcast singal DLg that is sent to enter reception antenna, thereby also realizes the isolation between the input and output up hill and dale easily.
(the 15 execution mode)
In the 15 execution mode of the present invention, the second identical broadcast singal of content with the up link broadcast singal that sends to geostationary satellite from the terrestrial broadcasting station is sent to the calking device by a ground network.According to second broadcast singal that sends by this ground network, this calking device produces one and sends to the identical forwarding broadcast singal of downlink broadcast signals of broadcasting receiver with this geostationary satellite, and should transmit broadcast singal and send to the blind area.
Figure 33 is the block diagram of this configuration of explanation.Terrestrial broadcasting station (not shown) produces second broadcast singal identical with the content of the up link broadcast singal that sends to geostationary satellite from our station and a signal format that is suitable for cable transmission, and by a ground public network NW such as ISDN net this second broadcast singal is sent to calking device GFf.
When calking device GFf receives second broadcast singal from this terrestrial broadcasting station by modulator-demodulator, chromacoder 3101 is the signal format that is suitable for satellite broadcasting with the signal format of this second broadcast singal from the format conversion that is suitable for cable transmission.This broadcast singal that is suitable for satellite transmits is the S-band radiofrequency signal by frequency converter 3102 frequency conversions, be amplified to big or small corresponding transmission power level with the blind area by power amplifier 3103 again, transmit broadcast singal sends to building or behind like that from transmitting antenna 3104 blind area as one then.
Utilize this configuration, can not be installed in the place that can receive, also can broadcast this broadcast singal to this blind area fully from the downlink broadcast signals of geostationary satellite even work as the calking device.
Calking device GFf not only has the circuit that is used for receiving by ground public network NW this broadcast singal and this forwarding broadcast singal of generation, be used to receive but also have one from the downlink broadcast signals of geostationary satellite and with the circuit of this signal transformation, shown in Figure 21 or 32 for the forwarding broadcast singal.According to calking Unit Installation situation, one of broadcast singal that foregoing circuit produced can be chosen, and be sent to the blind area.
Specifically, as shown in figure 34, a kind ofly receive from the pattern of the downlink broadcast signals of geostationary satellite SAT ' and a kind ofly receive the pattern of this broadcast singal by ground public network NW by antenna 3105 and receiver, available conversion equipment SW changes.
Can increase a kind of circuit, be used for judging the quality of reception of the downlink broadcast signals of geostationary satellite.Received this downlink broadcast signals if this decision circuitry is judged with the predetermined quality of reception, then selected, and it has been sent to the blind area according to the forwarding broadcast singal that downlink broadcast signals produced from geostationary satellite.If judge not reach the predetermined quality of reception, then select the forwarding broadcast singal that is produced according to second broadcast singal that sends by ground public network NW, and it is sent to the blind area.
(the 16 execution mode)
In the 16 execution mode of the present invention, the calking device can produce the monitor message of this device of expression operating state and this monitor message is sent to Surveillance center, and Surveillance center monitors the operating state of calking device according to this monitor message.
Figure 35 shows the first configuration example according to the system of present embodiment.With reference to Figure 35, calking device GFg detects the parameter of this device of expression operating state at the fixed time in the section, i.e. the launching electrical level of the incoming level of downlink broadcast signals or the broadcast singal of transmitting, and deposit this parameter in memory as monitor message.
The MCa of Surveillance center produces monitor message transmission request regularly or momentarily, and the request of should transmitting sends to calking device GFg by ground network NW.In view of the above, calking device GFg reads this monitor message from memory, and by ground network NW this information is sent to the MCa of Surveillance center.At this moment, only up-to-date monitor message is sent to the MCa of Surveillance center.But, also can send from before transmit timing each bar monitor message of storing to current transmit timing.
The MCa of Surveillance center adopts polling mode many monitor messages of in service area a plurality of calking devices of collecting, and shows or print collected monitor message.The MCa of Surveillance center is also according to the content of monitor message, judges that the operating state of calking device is whether normal and shows judged result.
Utilize this configuration,, therefore be convenient to effective maintenance because the MCa of Surveillance center can manage the operating state of each calking device GFg concentratedly.In addition, owing to adopt polling mode to collect these monitor messages, so the monitor message that can collect some calking devices effectively.
Figure 36 shows the second configuration example according to the system of present embodiment.With reference to Figure 36, each calking device GFh is connected by a satellite communication channel with the MCb of Surveillance center.When the monitor message transmission request from the MCb of Surveillance center arrives by this satellite communication channel, calking device GFh reads monitor message from memory, this monitor message is converted to the signal format that is suitable for satellite communication, by this satellite communication channel this monitor message is sent to the MCb of Surveillance center again.
Utilize this configuration,, therefore need not to utilize the communication line of ground network NW owing to can utilize collect these monitor messages of self-interstitial device of the satellite communication channel of existing geostationary satellite.
In above-mentioned example, the MCa of Surveillance center or MCb adopt the collect monitor message of self-interstitial device GFg or GFh of polling mode.Except the collecting function of this employing polling mode, calking device GFg or GFh also have operating state from arbitration functions.If the operating mistake of detecting, addressable MCa of Surveillance center of calking device GFg or GFh or MCb also are notified to MCa of Surveillance center or MCb with the monitor message relevant with this mistake.
Like this, when operating mistake occurring in the calking device, Surveillance center can detect this mistake immediately, and it is possible therefore recovering rapidly.
If calking device GFg or GFh detect the reception mistake from the broadcast singal of satellite, or the operating mistake of this calking device GFg or GFh appearance itself, this calking device can send a piece of news, so that give MCa of Surveillance center or MCb with this message informing, simultaneously this message sent to each broadcasting receiver in the blind area.As the message that sends to each broadcasting receiver, can use text message or speech information, as " poor from the satellite quality of reception this moment, as to ask Wait-to-Restore ".
Figure 37 shows the 3rd configuration example according to the system of present embodiment.With reference to Figure 37, when producing a forwarding broadcast singal according to downlink broadcast signals and sending this signal from geostationary satellite, calking device GFi will represent that the monitor message of this device operating state is multiplexed in this forwarding broadcast singal, sends to the blind area with this signal again.As a kind of multiplex mode, can adopt FDM or CDM.
Check receiver MR places the optional position of blind area, for example with corresponding position, the edge in this district.This check receiver MR can be the portable or vehicular of attendant, also can be fixed.Check receiver MR receives forwarding broadcast singal and separation and the extraction monitor message that calking device GFi sends, and also detects the incoming level of transmitting broadcast singal.Incoming level detects data and is inserted in the monitor message, and this monitor message sends to the MCc of Surveillance center by a mobile radio communication INW such as cellular radiotelephone system or PHS.
Utilize this configuration, the actual incoming level that records of check receiver MR detects data can send to the MCc of Surveillance center with the monitor message that the calking device produces.Therefore, the MCc of Surveillance center not only can judge the operating state of calking device itself, and can judge the consistency of actual reception level in launching electrical level and the blind area.
The present invention is not limited to above-mentioned execution mode.For example, can adopt simultaneously and the calking device is installed is on the ground come the mode of coverage hole and utilize two geostationary satellites to come the mode of coverage hole, thus the zone that any mode in this dual mode of can covering all can not all standing.
In above each execution mode, for example understand a kind of broadcasting-satellite system that utilizes geostationary satellite, the calking device receives the broadcast singal of geostationary satellite transmission and is forwarded to broadcasting receiver MS.Yet the present invention is not limited to this configuration.For example in a kind of interactive satellite broadcast system, the calking device can be transmitted the signal that sends to a certain satellite from this broadcasting receiver MS, and this signal is sent to this satellite.
In above execution mode, covering be building blind area behind.Yet the present invention also can be applicable to cover other facility such as tower seat or natural forms such as certain mountain or the formed slit region of a certain cliff.
The present invention also can be applicable to blind area in the covering chamber.For example, a small and exquisite indoor calking device (transponder) is installed in the windowsill place that for example can directly receive the satellite downlink broadcast singal.The broadcast singal of transmitting send to indoorly from this transponder, and the machine that is received receives.Like this, this receiver can or like thatly be connected with this transponder by coaxial cable, and the downlink broadcast signals that is received is sent to receiver by this coaxial cable.This transponder can be installed on the top in building or house or the top.
In addition, for the configuration or the installation site of calking device, the type of broadcasting receiver MS or configuration, the type of satellite, perhaps the type or the send mode of this satellite signal that will send also can make various changes and modifications within the spirit and scope of the present invention.
Described in above the tenth to the 16 execution mode, according to a third aspect of the invention we, adopted a kind of calking device.This calking device receives the broadcast singal that satellite is transmitted.In service area, the received broadcast signal with the identical frequency of frequency of the broadcast singal of this satellite transmission, be wirelessly sent to the zone of the broadcast singal that does not receive this satellite transmission.Utilize this configuration, can not directly receiving in the blind area of this radiofrequency signal of certain building or behind like that, need not to be provided with main equipment, fixed station and mobile station MS all can receive this signal well.Therefore, can provide a kind of broadcasting-satellite system and corresponding a kind of calking device of realizing effective calking at an easy rate.
Below, by the 17 execution mode a fourth aspect of the present invention is described.
(the 17 execution mode)
Figure 38 shows the configuration schematic diagram according to the broadcasting-satellite system of the 17 execution mode of the present invention.This broadcasting-satellite system comprises the geostationary satellite 430 on a transfer station 410 that is positioned at ground and the geostationary orbit that is positioned at the sky, equator, and the attitude of this satellite is subjected to the control from the command signal of satellite control desk 420.
Figure 38 only shows a station as transfer station 410.But also can use a plurality of stations.
In transfer station 410, for example, when program 1 to N was imported, program 1 to N was input to multiplier 4101 respectively to 410N, as shown in figure 39.With selection number (so-called channel number) the corresponding extended code that on receiving terminal, is used to select these signals, be input to multiplier 4101 to 410N from extended code generator 4111 to 411N, so, multiplier 4101 to 410N multiplies each other program 1 to N respectively with extended code, the result is exported to synthesizer 412 again.
For example, when channel signal (CH1 to CH8) will be sent out, the centre frequency of channel signal (CH1, CH3, CH5, CH7 and CH8) was located at F1, and the centre frequency of channel signal (CH2, CH4 and CH6) is located at F2, as shown in figure 40.
The reception antenna 431 of geostationary satellite 430 links to each other with reception feeder unit 433, so that the receive channel signal is exported to reception feeder unit 433.Receive feeder unit 433 and link to each other, so input channel signal (CH1 to CH8) is exported to polarizer 434 after by frequency conversion with for example polarizer 434.Polarizer 434 links to each other with feeder link receiver 435, so input channel signal is exported to feeder link receiver 435 after being set to circularly polarised wave.
The first power amplifier 437a links to each other with right-handed circular polarization device 438a, so input channel signal (CH1, CH3, CH5, CH7 and CH8) is exported to right-handed circular polarization device 438a after the power amplification.Right-handed circular polarization device 438a links to each other with emission feeder unit 439, so input channel signal (CH1, CH3, CH5, CH7 and CH8) is to export to behind the right-handed circular polarization ripple to launch feeder unit 439 by frequency conversion.
The second power amplifier 437b links to each other with left-hand circular polarization device 428b, so input channel signal (CH2, CH4 and CH6) is exported to right-handed circular polarization device 438b after the power amplification.Right-handed circular polarization device 438b links to each other with emission feeder unit 439, so input channel signal (CH2, CH4 and CH6) is to export to behind the left-hand circular polarization ripple to launch feeder unit 439 by frequency conversion.
On the other hand, be used to receive receiving terminal 450, a reception antenna 451 corresponding with the transmitting antenna 432 of geostationary satellite 430 arranged, as shown in figure 41 from the channel signal (CH1 to CH8) of geostationary satellite 430.The channel signal (CH1 to CH8) that is received is exported to and is received feeder unit 452.Receiving feeder unit 452 links to each other with left-hand circular polarization device 453b with right-handed circular polarization device 453a.The output of right-handed circular polarization device 453a and left-hand circular polarization device 453b links to each other with receiver 455 by transducer 454.
The change operation means (not shown) links to each other with transducer 454.When the user operates this change operation means (not shown) and selects one of right-handed circular polarization device 453a and left-hand circular polarization device 453b, import a switching signal.Transducer 454 is according to this switching signal, select one of right-handed circular polarization device 453a and left-hand circular polarization device 453b, thereby the channel signal (CH2, CH4 and CH6) that will be input to the channel signal (CH1, CH3, CH5, CH7 and CH8) of right-handed circular polarization device 453a or be input to left-hand circular polarization device 453b is exported to receiver 455.
As shown in figure 42, receiver 455 has a radio-circuit 455a corresponding with transducer 454.Radio-circuit 455a links to each other with de-spreading circuit 455c by demodulator 455b.Utilize this configuration, when channel signal (CH1, CH3, CH5, CH7 and CH8) or channel signal (CH2, CH4 and CH6) input, radio-circuit 455a carries out frequency conversion to these channel signals, they is exported to demodulator 455b again.
Demodulator 455b carries out demodulation to the channel signal (CH1, CH3, CH5, CH7 and CH8) or the channel signal (CH2, CH4 and CH6) of input, they is exported to de-spreading circuit 455c again.De-spreading circuit 455c links to each other with the control circuit 455d that is used for selective channel, therefore the channel signal (CH1, CH3, CH5, CH7 and CH8) of input or channel signal (CH2, CH4 and CH6) are after despreading is handled, separated according to the channel signalization that is input to control circuit 455d, export to for example display part (not shown) of output again.
This channel signalization can be provided with by for example channel setting operation device (not shown) is switched by the user.
As mentioned above, in this broadcasting-satellite system, a plurality of channel signals with different center frequency send to geostationary satellite 430 with the ku wave band from transfer station 410, in geostationary satellite 430, be classified by each centre frequency, be transformed to dextrorotation or left-hand circular polarization ripple, and be sent to service area as the S-band channel signal.On receiving terminal 450,, can receive required channel signal by selective channel.
The signal processing of geostationary satellite 430 is divided into unify left-hand circular polarization wave system system of right-handed circular polarization wave system, promptly adopts a plurality of power down signal treatment systems to constitute.Owing to adopt these power down signal treatment systems can increase the number of channel, therefore the requirement that increases the number of channel can be easily satisfied in this configuration.
Channel signal (CH1 to CH8) is separated into right-handed circular polarization ripple signal and left-hand circular polarization ripple signal is sent out again.Have only the signal of equidirectional circularly polarised wave just to play the effect of signal interference source.Therefore, can reduce the interference noise power relevant with the number of channel.According to this viewpoint, can increase the number of channel as far as possible equally.
When with CDM multiplexed channel signal (CH1 to CH8) when polarizing in the other direction (for example when the channel signal right-handed circular polarization time), the channel signal different with the channel signal of equidirectional circular polarization (for example left-hand circular polarization channel signal) plays the interference noise power effect.Therefore, the increase of the channel signal number that will send along with geostationary satellite, interference noise power also increases, and therefore unlikely guarantees required power ratio C/N.Yet, as feature of the present invention, when the channel signal that is sent polarizes by opposite direction, can reduce interference noise power, as mentioned above, therefore, can increase the number of channel.
Specifically, when the antenna axial ratio of 430 pairs of receiving terminals of earth synchronous satellite is about 2dB/3dB, can guarantee 10dB or the above isolation of 10dB between the rightabout polarized wave.When using two kinds of polarized waves, to compare with only using a kind of polarized wave, interference noise power can descend 55%.In the time can guaranteeing required transmitting power, can make channel capacity improve about 1.8 times.
In the 17 execution mode, channel signal is turned to dextrorotation or left-hand circular polarization ripple by entelechy.Yet the present invention is not limited thereto.Channel signal can be vertically polarized wave or horizontal polarized wave by linear polarization.Utilize this configuration, can reach and above-mentioned effect effect much at one.
In the 17 execution mode, as modulator approach, utilize extended code that signal is modulated, and carry out multiplexed to signal with CDM.Yet the present invention is not limited thereto, and can adopt multiple modulator approach and multichannel multiplexing method.
Described in above the 17 execution mode, according to a forth aspect of the invention, can provide a kind of broadcasting-satellite system and corresponding a kind of receiving terminal of the easy increase number of channel.
Below, by the 18 execution mode a fifth aspect of the present invention is described.
(the 18 execution mode)
Figure 43 shows the allocation plan according to the broadcasting-satellite system of the 18 execution mode of the present invention.This broadcasting-satellite system comprises a plurality of broadcasting station BC1 and BC2 (comprising the feeder link station), a geostationary satellite SAT and a Satellite Tracking control desk STCC.Terrestrial broadcasting station BC1 and BC2, each sends broadcasting station made and editor's programme information all with Ka wave band (26.5 to 40GHz) or Ku wave band (12.5 to 18GHz) to this geostationary satellite SAT by uplink transmission channels.This geostationary satellite SAT is managed by Satellite Tracking control desk STCC, thereby remains on a precalculated position on the geostationary orbit in the sky, equator.
The configuration of this geostationary satellite SAT as shown in figure 44.In Figure 44, label 511 is represented the satellite main body.Satellite main body 511 comprises the solar panel of using as power supply 5121 and 5122; Ka or Ku wave band antenna 513, it comprises that a diameter is speculum 5131 and primary radiator 5132 of 2.5m level (or littler); (for example, 2.6GHz) antenna 514, and it comprises speculum 5141 and primary radiator 5142 that a diameter is 8 to 15m levels with a S-band.
Terrestrial broadcasting station BC1 or BC2 after the multiplexed and broadcast singal that sends received by Ka or Ku wave band antenna 513, separated to be in harmonious proportion by the signal processing unit (not shown) in the satellite main body 511 and amplify, and be transformed to the signal of a S-band.Broadcast singal after the conversion sends to service area by the S-band downlink transmission channel from S-band antenna 514.
In this service area, be contained in the fixed station in office for example or the family, perhaps, receive this broadcast singal that geostationary satellite SAT sends such as the mobile station MS of vehicular receiver or portable terminal.
In the S-band downlink transmission channel, be that a plurality of channels that mostly are 900 channels most of 64 to 256Kbps/ channels carry out multiplexed to transmission rate.In order to send vision signal, adopt MPEG4 (active images expert group 4) as method for video coding with a certain channel.
As a kind of be that the big antenna 514 of 8 to 15m levels installs on the satellite main body 511 and the technology of it being arranged in the space with diameter, can adopt " extended antenna structure " among the Japanese patent application No. 1-245707 for example, " extended antenna " among the Japanese patent application No. 1-195704, " wireless speculum " among the Japanese patent application No. 63-242004, or " expansion ring bodies " among the Japanese patent application No. 2-261204.
When the primary radiator 5142 of S-band antenna 514 adopted multi-beam configuration radiant bodies, service area can be divided into a plurality of districts and beam can independently form.Figure 45 shows the beam allocation when this service area is divided into four districts.In Figure 45, the reception area that on behalf of each beam, #1 to #4 cover.
When transmitting antenna 514 has the multi-beam function, all channels of this satellite broadcasting just go for whole service area, and the signal processing unit in the satellite can be arranged into any one channel any one beam, and only to this channel of district's broadcasting that is necessary.This makes service more flexible.
Figure 46 and 47 shows the configuration of the portable receiver in the broadcasting-satellite system that can be used for having as above configuration.Figure 46 is its profile, and Figure 47 is its internal circuit configuration.
In Figure 46, label 521 is represented cabinet.Cabinet 521 has a flagpole antenna 522 that is used to receive S-band satellite broadcasting electric wave, one is used to receive or tuning action button 523, a LCD 524 and an a pair of loud speaker (left side and right) 525 that is used to amplify institute's received audio signal that is used to show institute's receiving video signals.
In Figure 47, the satellite broadcast signal from geostationary satellite SAT that flagpole antenna 522 is caught is input to audio/video separation circuit part 527 through receiver 526 after the tuning and detection.Audio/video separation circuit part 527 is separated into voice data and video data with received signal.Voice data is input to audio decoder 528, and video data is input to Video Decoder 529.
The directivity of all directions around flagpole antenna 522 has usually is shown in Figure 48 A.In Japan, just can be received with enough gains from the satellite broadcasting electric wave of about 45 ° of directions.When adopting its received beam figure to be approximately 30 ° of antenna AT to 60 ° of elevations angle, shown in Figure 48 B, can receive broadcasting wave with almost maximum gain from this satellite SAT.
If the received beam figure of antenna AT can point to any direction, and this antenna direction can be controlled to obtain maximum incoming level, so, and vehicular antenna for example, even when automobile tilts, also all the time can be with the broadcasting wave of maximum gain reception from this satellite SAT.
528 pairs of voice datas that receive of audio decoder are decoded reproducing audio signal.The audio signal of reproducing is after amplifying, from loud speaker 525 outputs.Video Decoder 529 for example utilizes, and MPEG4 decodes playback video signal to institute's receiving video data.This vision signal shows on LCD 524.
According to the expectant control program, Controlled CPU circuit part 530 is finished the tuning control of receiver 526 and the separating controlling of audio/video separation circuit part 527.
Utilize as above configuration, the broadcast singal that a plurality of broadcasting station BC1 and BC2 send, send to geostationary satellite SAT by Ka or Ku wave band uplink transmission channels, send to service area by the S-band downlink transmission channel from geostationary satellite SAT again, fixed station and mobile station MS in the serviced then district receive.
Because uplink transmission channels is different with the frequency band of downlink transmission channel, therefore decline can not appear.
Because the major diameter S-band antenna 514 of this geostationary satellite SAT with one 8 to 15m level, so each fixed station or mobile station MS can receive this broadcast singal with enough strong field intensity.Therefore, each fixed station or mobile station MS can easily come receiving broadcast signal with a kind of small and exquisite flagpole antenna or flat plane antenna.
When one of channel of the broadcast singal that will send as broadcasting station BC1 or BC2 when certain communication channel is inserted into, can finish to the control of the signal processing content on this satellite and to the independent control of each receiver.
In the 18 execution mode, for example understand portable receiver.The also available same circuit arrangement of indoor or vehicular receiver realizes.Specifically, as portable or vehicular antenna, can adopt a kind of flagpole antenna or a kind of have at least around direction-free flat plane antenna on all directions.Like this, because receiver itself needn't point to the arrival direction of satellite broadcasting electric wave, so receiver operation gets up easily.
Because conventional digital broadcasting image is observed TSC-system formula or high-quality HDTV standard as the used ground simulation image mode of present TV, therefore need very high transmission rate, i.e. wide bandwidth.For example, horizontal picture dot number * vertical line number * frame frequency is in 720 * 576 * 30 to 1920 * 1152 * 60 scope.Even the MPEG2 video compression standard that is applicable to the good transmission environment that conforms to these modes also needs 15 to 100Mbps speed.
When data rate improves, need bigger broadcasting power, and the passband of each channel is widened also.This has just reduced broadcast channel number available on the given bandwidth.For the mobile broadcast in the abominable transmission environment, also must further increase broadcast power.
In native system,, adopt MPEG4 as the high compression mode in order to reduce to broadcast the required broadcasting power of image broadcasting and increase the broadcast channel number to tracker action such as automobile.Because this coded system itself has very strong anti-transmission error ability, therefore as mobile communication (radio communication) compress mode, MPEG4 has been subjected to extensive concern.
Figure 49 shows the configuration of a kind of MPEG4 image transmission device that is applicable to the 18 execution mode.The artificial picture intelligence that natural image signal that video frequency camera 531 is taken the photograph or computer graphical form sends to geostationary satellite SAT by MPEG4 code device 532 codings with after compressing from transmitter 533.This emission output is broadcasted to the fate by geostationary satellite SAT, and is had the receiver reception of configuration shown in Figure 47.
Transmitted wave from geostationary satellite SAT can also can be transmitted by ground based repeater directly to receiver broadcasting, perhaps can be transmitted by another communication satellite or broadcasting satellite.
Figure 50 A and 50B show an example broadcasting screen of this system.Corresponding with 3 to 12 inches screen sizes of portable or vehicular portable terminal, the horizontal picture dot number * vertical line number of image is made as 176 * 144 or 352 * 288, and shown in Figure 50 A, the per second frame frequency is made as 15, shown in Figure 50 B, and transmission rate is made as about 64 to 256kbps.
For portable or vehicular portable terminal, when the horizontal picture dot number of its screen size, image and vertical line number and frame frequency suitably are provided with, can reduce broadcasting power required when tracker action such as the broadcasting of automobile broadcasting image, and can increase the broadcast channel number.
When MPEG4 is used for the vision signal that will be used for satellite broadcasting is compressed and when encoding,, can reproduce this vision signal according to the paying situation of the broadcasting license fee of the radio wave receiving state of acceptance point, receiver or the function of the Video Decoder of adorning.
Above-mentioned broadcasting-satellite system of the present invention can satisfy following requirement.
. can select nationwide broadcast and spot broadcasting.
. even hand-hold type receiving terminal (removable) also can be to receive this broadcast singal.
. transfer station can realize with simple mechanism, and have interactive function.
. owing to not only improved image quality but also increased the number of channel, therefore can utilize some dedicated channels that information service is provided.For example can realize lecture, the music program of CD quality, news, weather forecast, quotations on the stock market, entertainment information, religion information, local program, private broadcasting, real estate/house information, Transaction Information, TV shopping, various hot issue, the data broadcasting of various auctions, private school or preparatory school, or the like.
Described in above the 18 execution mode, according to a fifth aspect of the invention, a kind of broadcasting-satellite system can be provided, this system allows receiver to adopt a kind of simple antenna system to receive, this antenna system not only can satisfy the requirement of indoor use but also can satisfy on tracker action to be used or as the requirement that portable equipment uses, can also provide corresponding a kind of satellite broadcast receiver.
Below, by the 19 execution mode a sixth aspect of the present invention is described.
(the 19 execution mode)
Figure 51 shows the configuration according to the satellite broadcast receiver of the 19 execution mode of the present invention.
This satellite broadcast receiver comprises an antenna 61, receiving unit 62, video output interface 63, screen importation 64,65, travel conditions test section of transmitter (M) 66, card storage area 67, timer 68, a storage area 69 and a control section 610.
Geostationary satellite is a multiplexed broadcast singal of a plurality of channels is input to receiving unit 62 after being received by antenna 61.Receiving unit 62 carries out demodulation to the broadcast singal of the specified channel of control section 610 (will be described later) in multiplexed broadcast singal, with this signal reproduction is a vision signal (vision signal) and an audio signal (not shown), they is input to video output interface 63 again.
Screen importation 64 is the touch panels on the display screen that is installed in the monitor that links to each other with video output interface 63, and it is made of video transmission formula piezoelectric device.The user wait to touch this input equipment with finger, just can specify a viewing area on this monitor and a receive channel of specified satellite broadcasting receiver.Information from screen importation 64 is input to control section 610.
Travel conditions test section 66 is transducers, unclamps rate, steering wheel position and braking force in order to the accelerator pedal that detects this automobile.Travel conditions test section 66 is input to control section 610 with each bar detection information, and will be input to control section 610 as travel speed information from the resulting velocity pulse of automobile control section.
Speech data memory block 69a is such district, this district is used for storing and is used to discern specific user's speech data (voiceprint data) or speech data that conforms to each other and predetermined instruction data, to confirm that the user voice data from transmitter 65 is for example receive channel conversion instructions of instruction data.This speech data memory block 69a store also that the user imports in advance with the corresponding speech data of this director data, to improve the precision of identifying speech of speech data.
The information that program data memory block 69b stores the receivable channel of this satellite broadcast receiver with the form of each kind or type hierarchical is shown in Figure 52.
In the 69b of program data memory block, also storage and the corresponding programme information (receive channel) of driver's fatigue conditions estimation result (will be described later).For example, preestablish a program that when estimating human fatigue and sleepy, is used to wake up the user, the program of for example broadcasting cheerful and light-hearted music.
Specific user's recognition device 610a may command: receive in advance from the specific user's of transmitter 65 voiceprint data and with this data record to speech data memory block 69a.To carry out the specific function (reception of particular channel of satellite broadcast receiver as the user, the change of memory contents in the storage area 69, or the like) time, whether carrying out such checking: will compare with the voiceprint data that are stored among the 69a of speech data memory block from the user voice data of transmitter 65, be the specific user to judge this user if handling.
Driver's situation estimating apparatus 610c analyzes the decline of driving time or driving ability according to travel conditions test section 66 detected various data, and estimation driver's fatigue conditions.
Channel control section 610d is according to the instruction of speech recognition equipment 610b institute speech recognition, the conversion of control receive channel, perhaps when driver's situation estimating apparatus 610c has estimated driver fatigue, the conversion of control receive channel is stored in program among the 69b of program data memory block with reception.
Under this channel control can received channel be the receive channel of being stored on the storage card 672.For permitting the receive channel that the specific user receives, before receiving, carry out the checking of specific user's recognition device 610a earlier and handle.
Viewing-data recording control apparatus 610e obtains the data and the time of reception of this satellite broadcast receiver institute receive channel according to the temporal information from timer 68, and control is recorded in these data on the storage card 672.
In the satellite broadcast receiver that has as above configuration, when the sound that sends a required channel number as the driver was changed receive channel, these voice were input to control section 610 from transmitter 65.
According to having the as above satellite broadcast receiver of configuration, the driver can easily change receive channel with voice according to the receive channel group that layering presents.In other words, the driver can change receive channel, and can not be disperseed driving demand power.
In the satellite broadcast receiver with as above configuration, driver's situation estimating apparatus 610c estimates driver's fatigue conditions according to travel conditions test section 66 detected information.Channel control section 610d controls receiving unit 62 according to this estimation result, with channel switch to the receive channel of for example broadcasting cheerful and light-hearted music.
According to having the as above satellite broadcast receiver of configuration, utilize various transducers to estimate driver's fatigue conditions.If estimate driver fatigue, channel is switched to the receive channel that helps to prevent sleeping (waking the driver up) in the driving procedure so, so that wake the driver up, thereby avoids traffic accident.
In the satellite broadcast receiver that has as above configuration, viewing-data recording control apparatus 610e is recorded in the information of institute's receive channel and rating temporal information and can be used for paying on the storage card 672 of reception fee.In view of the above, the user can easily pay reception fee usefulness, and audience rating data can be collected in the broadcasting station when collecting reception fee and using.
Described in above the 19 execution mode, according to a sixth aspect of the invention, when the user wanted to change receive channel, he came allocated channel by transmitter with voice.Speech recognition equipment is discerned these voice, and receiving system receives this channel of user speech input.Owing to can easily change receive channel with phonetic entry, therefore can provide a kind of satellite broadcast receiver, the convertible receive channel of this receiver, and can not disperse the driver-operated attentiveness.
In aspect the 6th,, detect driver's fatigue conditions according to the situation of advancing of tracker action, and reception and the corresponding channel of testing result.According to the present invention, carry out such setting, promptly when estimating driver fatigue, receive and be used for the channel that prevents that driver's driving procedure is sleeping.Therefore, can provide a kind of satellite broadcast receiver, this receiver can wake the driver up, to avoid traffic accident.
The present invention is not limited to above-mentioned execution mode, also can make various changes and modifications within the spirit and scope of the present invention.
Just as described above, according to broadcasting-satellite system of the present invention, can promptly change the channel of the multiplexed broadcast singal that received with high response speed as the broadcasting receiver of receiver terminal device, thereby make observer more convenient.
According to of the present invention as receiver terminal device wireless receiver, as the wireless broadcast system of broadcasting-satellite system with as the radio broadcasting device of the dispensing device of ground station, can make the influence of the instantaneous interruption that barrier causes minimum and obtain the satisfied quality of reception.
According to broadcasting-satellite system of the present invention and corresponding calking device, be in fixed station and travelling carriage in the zone of the building radiofrequency signal that can not directly receive satellite behind, all need not to be equipped with large-scale equipment and can receive this radiofrequency signal well, thereby realize cheap and effectively calking.
According to broadcasting-satellite system of the present invention and receiving terminal, can easily increase the number of channel with simple configuration.
According to broadcasting-satellite system of the present invention and satellite broadcast receiver, receiver can adopt a kind of simple antenna system to come received signal, and this antenna system not only can satisfy the requirement of indoor use but also satisfy the requirement of using or using as portable equipment on tracker action.
According to the satellite broadcast receiver as receiver terminal device of the present invention, can change receive channel, and the driver-operated attentiveness that can not disperse tracker action.In addition, can control the receive channel conversion according to driver's fatigue conditions, thereby avoid traffic accident.
Claims (4)
1. radio receiver is used for from the radio broadcasting device radio broadcasting transmitting the wireless broadcast system that data are carried out band spectrum modulation and carried out the multiplexed transmission signal that obtains, and carries on moving body, and this radio receiver is characterised in that to possess:
Receiving element carries out Rake to the aforementioned transmission signal from the wireless transmission of aforementioned radio broadcasting device and receives, and aforementioned transmission data are carried out demodulation;
Memory cell is used for the transmission data that will obtain by this receiving element at least during the store predetermined;
Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal;
Compensating unit, according to the transmission data that are stored in the aforementioned memory cell, compensation and the corresponding transmission data of transmission signal section that detect instantaneous interruption by this instantaneous interruption detecting unit.
2. a wireless broadcast system will carry out band spectrum modulation respectively and carry out the multiplexed transmission signal that obtains to the radio receiver radio broadcasting from radio transmission device the transmission data of a plurality of broadcast channels, it is characterized in that,
Aforementioned radio transmission device possesses:
Transmitting element is once more used channel with any one of aforementioned a plurality of broadcast channels as sending again, and the transmission signal loading of the part that aforementioned radio receiver request is sent once more sends with sending once more on the channel once more to aforementioned,
Aforementioned radio receiver possesses:
Receiving element carries out Rake to the aforementioned transmission signal from aforementioned radio broadcasting device radio broadcasting and receives, and aforementioned transmission data are carried out demodulation;
Delay cell is used to make the transmission data with obtaining by this receiving element to postpone specified time limit at least;
Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal;
Send request unit once more, send the transmission signal that detects the part of instantaneous interruption by aforementioned instantaneous interruption detecting unit to aforementioned radio broadcasting device request once more;
Compensating unit, when the transmission signal of the part that sends once more from the aforementioned request that receives of transmitting channel once more by aforementioned receiving element, the transmission data of utilization after aforementioned receiving element is by demodulation, the lost part that the aforementioned instantaneous interruption of the transmission data that are delayed in aforementioned delay cell is caused compensates.
3. radio receiver, be used for the transmission data of a plurality of broadcast channels being carried out band spectrum modulation and carrying out the wireless broadcast system of the multiplexed transmission signal that obtains from the radio broadcasting device radio broadcasting, and carry on moving body, this radio receiver is characterised in that to possess:
Receiving element carries out Rake to the aforementioned transmission signal from aforementioned radio broadcasting device radio broadcasting and receives, and aforementioned transmission data are carried out demodulation;
Delay cell is used to make the transmission data with obtaining by this receiving element to postpone specified time limit at least;
Instantaneous interruption detecting unit detects the instantaneous interruption of the aforementioned transmission signal that aforementioned receiving element produces in receiving the process of aforementioned transmission signal;
Send request unit once more, send the transmission signal that detects the part of instantaneous interruption by this instantaneous interruption detecting unit to aforementioned radio broadcasting device request once more;
Compensating unit, when the response of aforementioned radio broadcasting device receive the aforementioned request that sends request unit once more, when the transmission signal loading of the part of being asked is sent to one transmitting channel once more as aforementioned broadcast channel, the transmission data of utilization after aforementioned receiving element is by demodulation, the lost part that the aforementioned instantaneous interruption of the transmission data that are delayed in aforementioned delay cell is caused compensates.
4. a radio broadcasting device will carry out band spectrum modulation and carry out the multiplexed transmission signal that obtains to the radio receiver radio broadcasting respectively the transmission data of a plurality of broadcast channels, it is characterized in that possessing:
Memory cell, the transmission data that storage and maintenance have been sent out;
The request of transmission once more of the transmission data of the lost part from aforementioned radio receiver received signal notice, aforementioned transmission signal is accepted in the retransmission process unit;
Transmitting element once more use channel with any one of aforementioned a plurality of broadcast channels as sending once more, asks according to aforementioned the transmission once more, and the transmission data load of the part of being asked is sent to aforementioned transmitting channel once more.
Applications Claiming Priority (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP178674/1997 | 1997-07-03 | ||
| JP17867697A JP3505354B2 (en) | 1997-07-03 | 1997-07-03 | Satellite broadcasting system and receiving terminal |
| JP17867997A JP3505355B2 (en) | 1997-07-03 | 1997-07-03 | Satellite broadcasting system |
| JP9178674A JPH1127592A (en) | 1997-07-03 | 1997-07-03 | Satellite broadcast receiver |
| JP178677/1997 | 1997-07-03 | ||
| JP178679/1997 | 1997-07-03 | ||
| JP17867897A JPH10308941A (en) | 1997-03-03 | 1997-07-03 | Satellite broadcast system and satellite broadcast receiver |
| JP9178677A JPH1174826A (en) | 1997-06-17 | 1997-07-03 | Radio receiver, radio broadcasting system and radio broadcasting device |
| JP17865997A JP3557079B2 (en) | 1997-03-03 | 1997-07-03 | Satellite broadcasting system and its gap filler device. |
| JP178659/1997 | 1997-07-03 | ||
| JP178676/1997 | 1997-07-03 | ||
| JP178678/1997 | 1997-07-03 |
Related Parent Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98800925A Division CN1231090A (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2004100282856A Division CN1536800B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1881835A CN1881835A (en) | 2006-12-20 |
| CN1881835B true CN1881835B (en) | 2010-09-08 |
Family
ID=37519846
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100907796A Expired - Fee Related CN1881835B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2006100907739A Expired - Fee Related CN1881854B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2006100907813A Expired - Fee Related CN1881836B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2006100907828A Expired - Fee Related CN1881856B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CNA2006100907809A Pending CN1881855A (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100907739A Expired - Fee Related CN1881854B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2006100907813A Expired - Fee Related CN1881836B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CN2006100907828A Expired - Fee Related CN1881856B (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
| CNA2006100907809A Pending CN1881855A (en) | 1997-07-03 | 1998-07-03 | Satellite broadcasting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN1881835B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117796B (en) * | 2013-01-25 | 2015-07-22 | 西安空间无线电技术研究所 | Relay retransmission device and relay retransmission method for satellite radio frequency and optical fiber signal transmission data |
| CN108289091A (en) * | 2017-12-25 | 2018-07-17 | 西安空间无线电技术研究所 | Remote sensing satellite ground base band data processing system based on rack-mount server |
| CN109444918A (en) * | 2018-10-24 | 2019-03-08 | 深圳大学 | Satellite-signal orients forwarding device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806804A (en) * | 1965-06-11 | 1974-04-23 | Martin Marietta Corp | Radio telephone system having automatic channel selection |
| CN85105956A (en) * | 1985-08-06 | 1987-02-25 | 菲利浦光灯制造公司 | About setting up the method and the device thereof of base apparatus and the mutual match code of mobile device |
| US5345594A (en) * | 1991-01-31 | 1994-09-06 | Pioneer Electronic Corporation | Information transmission system retransmitting information signals according to retransmission schedule |
| CN1091842A (en) * | 1992-12-07 | 1994-09-07 | 奥弗罗德有限公司 | The interrupt system and the method that comprise user interface |
| US5463656A (en) * | 1993-10-29 | 1995-10-31 | Harris Corporation | System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2901170B2 (en) * | 1993-05-27 | 1999-06-07 | ケイディディ株式会社 | Satellite / land mobile communication system integration method |
| JP3231589B2 (en) * | 1995-09-13 | 2001-11-26 | 三菱電機株式会社 | Satellite communication terminal system |
| US5907582A (en) * | 1997-08-11 | 1999-05-25 | Orbital Sciences Corporation | System for turbo-coded satellite digital audio broadcasting |
-
1998
- 1998-07-03 CN CN2006100907796A patent/CN1881835B/en not_active Expired - Fee Related
- 1998-07-03 CN CN2006100907739A patent/CN1881854B/en not_active Expired - Fee Related
- 1998-07-03 CN CN2006100907813A patent/CN1881836B/en not_active Expired - Fee Related
- 1998-07-03 CN CN2006100907828A patent/CN1881856B/en not_active Expired - Fee Related
- 1998-07-03 CN CNA2006100907809A patent/CN1881855A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806804A (en) * | 1965-06-11 | 1974-04-23 | Martin Marietta Corp | Radio telephone system having automatic channel selection |
| CN85105956A (en) * | 1985-08-06 | 1987-02-25 | 菲利浦光灯制造公司 | About setting up the method and the device thereof of base apparatus and the mutual match code of mobile device |
| US5345594A (en) * | 1991-01-31 | 1994-09-06 | Pioneer Electronic Corporation | Information transmission system retransmitting information signals according to retransmission schedule |
| CN1091842A (en) * | 1992-12-07 | 1994-09-07 | 奥弗罗德有限公司 | The interrupt system and the method that comprise user interface |
| US5463656A (en) * | 1993-10-29 | 1995-10-31 | Harris Corporation | System for conducting video communications over satellite communication link with aircraft having physically compact, effectively conformal, phased array antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1881855A (en) | 2006-12-20 |
| CN1881835A (en) | 2006-12-20 |
| CN1881854B (en) | 2011-11-02 |
| CN1881854A (en) | 2006-12-20 |
| CN1881836A (en) | 2006-12-20 |
| CN1881856B (en) | 2012-05-30 |
| CN1881856A (en) | 2006-12-20 |
| CN1881836B (en) | 2010-07-07 |
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