CN104092526B - Multi-carrier communicating method and device for TDD mode MIMO wireless communicating system - Google Patents
Multi-carrier communicating method and device for TDD mode MIMO wireless communicating system Download PDFInfo
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- CN104092526B CN104092526B CN201410335105.2A CN201410335105A CN104092526B CN 104092526 B CN104092526 B CN 104092526B CN 201410335105 A CN201410335105 A CN 201410335105A CN 104092526 B CN104092526 B CN 104092526B
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Abstract
The invention discloses a multi-carrier communicating method and device for a TDD mode MIMO wireless communicating system. The wireless communicating system comprises multiple channels of baseband signals, and each channel of baseband signals comprises two spatial-flow signals. The method uses a multi-carrier technique of frequency conversion, filtering, different-carrier antenna separation and identical-carrier transceiving antenna separation. An emitter can respectively convert each channel of two spatial-flow baseband signals into two spatial-flow single-carrier microwave frequency band signals through twice up frequency conversion and then combines the two spatial-flow single-carrier microwave frequency band signals into a single-channel orthogonal-polarized double-spatial-flow microwave frequency band signal which is sent by an emitting antenna. A receiver can filter signals received by all receiving antennas and then separate the signals into two spatial-flow single-carrier microwave frequency band signals through OMT, and the two spatial-flow single-carrier microwave frequency band signals are converted into baseband signals through twice down frequency conversion. The invention further provides a communicating device using the method. Compared with the prior art, the multi-carrier communicating method and device can effectively utilize rich frequency spectrum resources of millimeter waves to multiply improve the data transmitting throughput capacity of the wireless communicating system.
Description
Technical field
The invention belongs to wireless communication technology field, more particularly to a kind of time division duplex (Time Division
Duplexing, TDD) pattern multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) radio communication system
The wireless multi-carrier communications method and device of system.
Background technology
3G (Third Generation) Moblie such as WCDMA technologies, it is non-MIMO technology, FDD (Frequency Division
Duplexing, FDD) mode of operation, its single carrier channel bandwidth 5MHz realizes 3.84Mbps symbol transmission speed.To improve
Power system capacity, base station has by the way of multi-carrier transmission, but the technology is to realize in the fdd mode, its downlink signal
2110~2170MHz of working frequency range, the working frequency range of uplink receiving signal：1920~1980MHz, its downlink signal
Very big with uplink receiving signal frequency interval, directly use is combined in radio frequency part or digital if technology i.e. can be real
Existing multi-transceiver technology.
Long Term Evolution (Long Term Evolution, LTE) and WLAN (Wireless Local Area
Networks, WLAN) physical layer use OFDM (Orthogonal Frequency Division
Multiplexing, OFDM) technology, it refers to baseband processing portion and individual channel is divided into one group of mutually orthogonal son load
Ripple, is to use single carrier wave to send a signal for channel in radio frequency part.Multicarrier of the present invention refers to tdd mode
The radio frequency part of mimo wireless communication system sends the signal of multiple channels using multiple carrier waves, and each carrier wave sends a channel
Signal.
The ultrahigh speed wireless local area network technology IEEE802.11ac of low-frequency range 5.8GHz in product in the market most
Big channel width is 80MHz, and outdoor double space streaming speed is up to 866.7Mbps, but forth generation movement in the market
The passback of communication technology LTE base station and multi-channel video streaming need the transmission rate of more than 1Gbps.China is in 5.8GHz frequency ranges
It is 5.725~5.85GHz, the only bandwidth of 125MHz, the 80MHz bandwidth less than 2 times have no idea to realize overloading in the frequency range
Ripple is transmitted.
Low-frequency range (be less than 6GHz) wireless communication spectrum resource is increasingly rare, the demand of very high-speed data transfer speed and
The frequency resource of millimeter wave frequency band is enriched very much so that millimeter wave frequency band ultrahigh speed wireless communication technology increasingly attracts attention,
Be used for for the frequency spectrum resource that 42.3~47GHz and 47.2~48.4GHz amount to 5.9GHz by such as in December, 2013, Ministry of Industry and Information's approval
Ultrahigh speed wireless access and without radio license.
Multi-carrier transmission is realized in tdd mode using the single carrier baseband chip of IEEE802.11ac, each intercarrier
It is nonsynchronous, the transmission signal of a carrier wave can be caused to be leaking directly into the receives link of another carrier wave so that it connects
Receive link saturation, it is impossible to enough work.The present invention will produce the carrier wave of different frequency using frequency conversion, using wave filter and different loads
The multi-transceiver technology that wave antenna separates the intercarrier signal isolation for producing overcomes the problem, realizes that tdd mode multi-carrier is transmitted,
Be multiplied the data transmission throughput of wireless communication system, when Base Band Unit uses IEEE802.11ac technical specifications, 2 carrier waves
The transmission rate of the wireless communication system of double space stream is up to 1.733Gbps.
Tdd mode typically realizes the separation of transmitter signal and receiver signal using transceiver toggle switch, due to millimeter
Wave frequency section transceiver toggle switch realizes that difficulty is larger, and loss is also larger, and the present invention uses transmitting antenna and reception antenna point
From method realize the mode of operation of TDD.
The content of the invention
Goal of the invention：Low-frequency range (being less than 6GHz) wireless communication spectrum resource is increasingly rare, widely uses interference very greatly,
Systematic function is had a strong impact on, or even can not effectively be worked, the present invention produces the carrier wave of different frequency using frequency conversion, using filtering
Device, the multi-transceiver technology that different carrier antenna is separated and dual-mode antenna is separate, overcome receive and dispatch under tdd mode switching problem and
The transmission signal of the asynchronous caused carrier wave between multicarrier is leaked to the receives link of another carrier wave so that it connects
Receive link saturation, it is impossible to the problem of enough work, effectively using the frequency resource that millimeter wave frequency band is very abundant, be multiplied wireless
The data transmission throughput of communication system, meets the passback of forth generation mobile communication technology LTE base station and multichannel in the market
Video streaming is up to the requirement of the transmission rate of more than 1Gbps.
Technical scheme：For foregoing invention purpose, the present invention is adopted the following technical scheme that：
A kind of wireless multi-carrier communications method of tdd mode mimo wireless communication system, the wireless communication system has N roadbeds
Band signal, two spaces stream signal is included per roadbed band signal, wherein, N is the natural number more than 1, and the method is by launching day
The step of mode of operation of TDD, method are realized in the separation of line and reception antenna be：
The frequency range that two spaces stream is up-converted to per the baseband signal of two spaces stream all the way is F by emitter1Single load
The frequency range for up-converting to two spaces stream after ripple radiofrequency signal again is F2Single carrier microwave frequency band signal after synthesize single channel again
The double space stream single carrier microwave frequency band signal of cross polarization is sent by a transmitting antenna, the base band of N roads two spaces stream
The single carrier microwave frequency band signal of the double space stream different frequency of the N roads cross polarization that signal is produced is sent out by N number of transmitting antenna
Send；
The letter of the double space stream microwave frequency band of the cross polarization of N number of carrier wave that receiver will be received from N number of reception antenna
Number by N number of wave filter and different carrier waves using different aerial band come isolation isolate the double space stream of N roads cross polarization
The single carrier microwave frequency band signal of different frequency, then by per the double space stream single carrier microwave frequency band signal of cross polarization all the way point
Down-converted to again after the single carrier microwave frequency band signal for two spaces stream after the single carrier radiofrequency signal of two spaces stream again
Down-convert to the baseband signal of two spaces stream.
Wherein, what transmitter signal was processed concretely comprises the following steps：
1.1) a spatial flow signal of each roadbed band signal produces single carrier to penetrate by I/Q modulators upconversion process
Frequency signal, upconverts to higher frequency section and produces single carrier microwave frequency band signal again after the filtering of single carrier radiofrequency signal；Baseband signal
Another spatial flow signal the single carrier microwave frequency band signal of another spatial flow is produced using same method；
1.2) the single carrier microwave frequency band signal of two spaces stream passes through orthomode coupler (Orthogonal Mode
Transducer, OMT) synthesize after the double space stream single carrier microwave frequency band signal of single channel cross polarization by a transmitting day
Line sends.
What receiver signal was processed concretely comprises the following steps：
2.1) receiver by the double space stream single carrier microwave frequency band signal per cross polarization all the way by orthogonal mode coupling
Device is separated into the single carrier microwave frequency band signal of two spaces stream；
2.2) by step 2.1) in two spaces stream single carrier microwave frequency band signal each spatial flow single load
Ripple microwave frequency band signal down-converts to single carrier radiofrequency signal, is demodulated by i/q demodulator again after the filtering of single carrier radiofrequency signal
Produce baseband signal.
A kind of multi-carrier communication apparatus using the as above tdd mode mimo wireless communication system of method, including N number of transmitting
Machine processing path and N number of receiver processing path；Each transmitter processes path include emitter baseband processing unit,
One radio frequency sending set processing unit, microwave frequency band upconversion process unit, emitter orthomode coupler, one
Transmitter filter and a transmitting antenna；Each receiver processing path includes receiver baseband processing unit, one
Individual radio-frequency transmitter processing unit, microwave frequency band frequency conversion processing unit, receiver orthomode coupler, one connect
Receipts machine wave filter and a reception antenna；
The emitter baseband processing unit, receiver baseband processing unit, radio frequency sending set processing unit, radio frequency reception
Machine processing unit, microwave frequency band upconversion process unit, microwave frequency band frequency conversion processing unit include two signal transactings respectively
Subpath, each signal transacting subpath is used for the treatment of spatial flow signal all the way；
The emitter baseband processing unit produces one group of baseband signal of two spaces stream, and exports to radio frequency sending set
Processing unit；
The input of the radio frequency sending set processing unit is connected with the output end of emitter baseband processing unit, for inciting somebody to action
The frequency range that the baseband signal of two spaces stream is converted into two spaces stream is F1Single carrier radiofrequency signal, and export to Microwave Frequency
Section upconversion process unit；
The input of the microwave frequency band upconversion process unit is connected with radio frequency sending set processing unit output end, is used for
It is F by the frequency range that the single carrier radiofrequency signal of two spaces stream is converted into two spaces stream2Single carrier microwave frequency band signal；N
Single load of the different frequency of N number of microwave frequency band upconversion process unit output N roads two spaces stream in individual transmitter processes path
Ripple microwave frequency band signal；
Two inputs of the emitter orthomode coupler respectively with the letter of microwave frequency band upconversion process unit two
The output end connection of number treatment subpath, the common port of emitter orthomode coupler is connected with transmitter filter, emitter
Wave filter is connected with transmitting antenna；Emitter orthomode coupler is used to close the single carrier microwave frequency band signal of two spaces stream
Double space stream single carrier microwave frequency band signal as single channel cross polarization, and export the double space stream list load of single channel cross polarization
Sent by transmitting antenna after ripple microwave frequency band signal to transmitter filter；
The input of the filter for receiver is connected with reception antenna, for the double of the cross polarization that receives antenna
The signal of spatial flow multicarrier microwave frequency band is filtered, and exports the double space stream single carrier microwave frequency band signal of cross polarization
To receiver orthomode coupler；
The common port of the receiver orthomode coupler is connected with the output end of filter for receiver, two output ends point
Input not with two signal transacting subpaths of microwave frequency band frequency conversion processing unit is connected, receiver orthomode coupler
For being the single carrier microwave frequency band letter of two spaces stream by the double space stream single carrier microwave frequency band Signal separator of cross polarization
Number and export respectively to two signal transacting subpaths of microwave frequency band frequency conversion processing unit；
The microwave frequency band frequency conversion processing unit is used to be converted into the single carrier microwave frequency band signal of two spaces stream
The single carrier radiofrequency signal of two spaces stream, and export to radio-frequency transmitter processing unit；
The input of the radio-frequency transmitter processing unit is connected with the output end of microwave frequency band frequency conversion processing unit, uses
In the baseband signal that the single carrier radiofrequency signal of two spaces stream is converted into two spaces stream, and export to receiver base band
Reason unit.
At emitter baseband processing unit, receiver baseband processing unit, radio frequency sending set processing unit, radio-frequency transmitter
Reason unit is relatively common in the prior art.The baseband signal of emitter baseband processing unit output two spaces stream is input into respectively penetrates
Two inputs for the treatment of subpath of channel transmitter processing unit, two treatment subpaths of radio frequency sending set processing unit
The single carrier radiofrequency signal of the two spaces stream of output end output distinguishes two signals of incoming wave frequency range upconversion process unit
The input of subpath is processed, the output end of two signal transacting subpaths of wave frequency section upconversion process unit exports two skies
Between flow single carrier microwave frequency band signal.Two treatment subpaths of radio-frequency transmitter processing unit are received under microwave frequency band respectively
Two single carrier radiofrequency signals of the two spaces stream for the treatment of subpath output of frequency-conversion processing unit, radio-frequency transmitter treatment is single
Two baseband signals for the treatment of subpaths output two spaces stream of unit are to receiver baseband processing unit.
Wherein, a signal transacting subpath of microwave frequency band upconversion process unit includes：
Radio-frequency signal filters, what a signal transacting subpath for receiving radio frequency sending set processing unit was exported penetrates
Frequency signal, exports after being filtered；Radiofrequency signal upconverter, the radiofrequency signal for receiving radio-frequency signal filters output,
Exported after radiofrequency signal is up-converted into microwave frequency band signal using microwave frequency band local oscillation signal；Microwave frequency band traffic filter,
Microwave frequency band signal for receiving the output of radiofrequency signal upconverter, exports after being filtered；And microwave frequency band signal work(
Rate amplifier, the microwave frequency band signal for receiving the output of microwave frequency band traffic filter is exported after carrying out power amplification；
One signal transacting subpath of microwave frequency band frequency conversion processing unit includes：
Microwave frequency band signal low-noise amplifier, the microwave frequency band signal for receiving transceiver toggle switch output, is carried out
Exported after low noise amplification；Microwave frequency band traffic filter, for receiving putting for microwave frequency band signal low-noise amplifier output
Microwave frequency band signal after big, exports after being filtered；Microwave frequency band signal low-converter, for receiving the filter of microwave frequency band signal
The microwave frequency band signal of ripple device output, is down-converted to microwave frequency band signal using microwave frequency band local oscillation signal defeated after radiofrequency signal
Go out；And radio frequency signal channel wave filter, the radiofrequency signal for receiving the output of microwave frequency band signal low-converter, it is filtered
After export.
The separation and Extraction of multi-carrier signal by different carrier antenna separation, transmitter filter, filter for receiver, penetrate
Frequency signaling channel wave filter comes together to complete.As the transmitter filter of same carrier frequencies is designed with filter for receiver,
Transmitter filter is the spurious signal for filtering spurious signal, including other carrier wave frequency ranges, prevents from disturbing the reception of other carrier waves
Machine and other wireless devices, different carrier antennas consider equipment size after separating, and the distance between them can be closer, receiver
Wave filter needs to filter the transmitter signal interference of other carrier waves and other wireless device out-of-band interference signals, prevents from receiving
The reduction of link saturation receiver sensitivity.Isolation between the design requirement of specific wave filter and different carrier antennas, identical load
Insulation request is as follows between ripple dual-mode antenna：
Degree of suppression D of the filter for receiver to adjacent carrier1, different carrier waves transmitting antenna and reception antenna between isolation
D2D is isolated into and between same carrier wave dual-mode antenna3Design according to equation below determine：
P1-D2-D1≤ -174-9 formula 1
D1+D2≥183+P1Formula 2
Ptx-D2-D1≤P2Formula 3
Ptx-D3≤P3Formula 4
D1+D2≥Ptx-P2Formula 5
Ptx-(A1+A2+D2+D1The formula 6 of)≤- 174+10log (B)+60
Wherein, the noise floor of receiver：- 174dBm/Hz, to cause the spurious signal influence receiver of emitter sensitive
The decreasing value of degree is not higher than 0.5dB, and the spurious signal of emitter have to be lower than the noise floor 9dB of receiver in receiver end,
After radio-frequency signal filters, microwave frequency band traffic filter filtering by microwave frequency band upconversion process unit, emitter is micro-
The single carrier microwave frequency band signal of wave frequency section upconversion process unit output is spuious at another adjacent carrier wave frequency range
Signal level：P1DBm/Hz, the single carrier maximum input signal level of receiver microwave frequency band frequency conversion processing unit：P2dBm,
The maximum input of the single carrier of receiver microwave frequency band frequency conversion processing unit does not damage signal level：P3DBm, emitter single carrier
Microwave frequency band signal output level：PtxDBm, the radio frequency signal channel wave filter in microwave frequency band frequency conversion processing unit is adjacent
The degree of suppression of carrier wave is：A1DB, the microwave frequency band traffic filter in microwave frequency band frequency conversion processing unit is in adjacent carrier
Degree of suppression is：A2DB, single carrier microwave frequency band signal bandwidth：BMHz.
The bandwidth of transmitter filter can be more than single carrier channel bandwidth, and its bandwidth selection is according to millimeter wave frequency band F2And filter
The insertion loss of ripple device determines, is chosen as 2% of carrier wave or so width.
Radio frequency signal channel wave filter, for completing the separation of multi-carrier signal, radio frequency letter together with filter for receiver
The frequency range of number channel model is F1, the frequency range is, compared with low-frequency range, to be chosen as less than 6GHz, and the transceiver of each carrier wave is at this
The frequency of frequency range is the same, the channel width of a width of single carrier radiofrequency signal of band of radio frequency signal channel wave filter.
Orthomode coupler, also referred to as orthomode transducer or bimodulus converter, for separating or synthesizing two orthogonal poles
Change the device of ripple, can be used polarised direction different and mutually isolated channel on same frequency under solution sighting distance (LOS) environment
2 problems of spatial flow of transmission.As the design of emitter orthomode coupler and receiver orthomode coupler, orthogonal mode coupling
Clutch has three physical ports, and public port is connected with antenna, and two other electrical port is respectively allocated to 2 spatial flows
Transceiver.
Wireless communication system includes WAP, client.Wherein WAP is alternatively referred to as central station, client
Alternatively referred to as remote station.WAP can realize that client can also using the method for above-mentioned transmitter and receiver
Realized using the method for above-mentioned transmitter and receiver.
Beneficial effect：Compared with prior art, the present invention effectively utilizes the very abundant frequency resource of millimeter wave frequency band, into
Increase the data transmission throughput of wireless communication system again, when Base Band Unit uses IEEE802.11ac technical specifications, 2 carrier waves are double
The peak rate of the wireless communication system of spatial flow can bring up to 1.733Gbps.
Brief description of the drawings
Fig. 1 is the schematic diagram of mimo wireless communication network；
Fig. 2 is the structural representation of apparatus of the present invention embodiment；
Fig. 3 is principle schematic of the invention；
Fig. 4 is the circuit block diagram of the BBP+5.8GHz RF transceivers in Fig. 3；
Fig. 5 is the structural representation of the OMT in apparatus of the present invention embodiment.
Specific embodiment
Technology of the invention can be used for various system of broadband wireless communication, and the example of this communication system includes TDD moulds
Formula millimeter wave wireless MIMO communication system etc..
The method of the present invention may be implemented in various wired or wireless communication devices, what the method in the present invention was realized
Radio node can include access point or user terminal.
Access point (Access Point, AP) can include, be implemented as or be base station transceiver, central station, base
Stand, transceiver function, wireless router, transceiver, Basic Service Set (Basic Service Set, BSS), extension clothes
Business collection (Extended Service Set, ESS) or some other terms.
User terminal (User Terminal, UT) can include, be implemented as or be access terminal, remote station, use
Family station, subscriber unit, movement station, user terminal, user's set, user equipment or some other terms.In some implementations
In, access terminal can including possess wireless connection capability phone, mobile phone, etc. computer
As shown in figure 1, the multiple-access MIMO system with access point and user terminal.When any given, access point
Can be communicated with one or more user terminals on the downlink and uplink.Downlink be from access point to
The communication link of family terminal, up-link is the communication link from user terminal to access point.User terminal can also with it is another
User terminal communicates point-to-pointly.System access controller is connected to access point, and provides coordination to access point and control.
Wireless MIMO communication system is tdd mode system, and for TDD system, downlink and up-link share identical
Frequency band.
Access point is directed to the emitter and the receiver for up-link of downlink.User terminal is directed to descending
The receiver of link and the emitter for up-link." emitter " is can be sent out by wireless channel as used in this article
The device or equipment of the independent operation of data are sent, " receiver " is the dress of the independent operation that data can be received by wireless channel
Put or equipment.
As shown in Figure 3 and Figure 4, the invention discloses a kind of multi-carrier communication side of tdd mode mimo wireless communication system
Method and principle of device schematic diagram.The inventive method is comprised the following steps：
(1) emitter baseband processing unit can generate baseband signal, base band letter according to IEEE802.11ac technical specifications
Number upconvert to F by I/Q modulators1Frequency range produces radiofrequency signal, F1Optional below 6GHz low-frequency ranges, preferably 5.8GHz,
Signal bandwidth is 80MHz, and F higher is upconverted to again after the filtered device filtering of the radiofrequency signal2Frequency range produces microwave frequency band letter
Number, F2With super band, preferably 45GHz frequency ranges produce the microwave frequency band letter of N roads single carrier to optional 10GHz according to the method described above
Number, its carrier frequency is respectively f1..., fN.During 2 carrier schemes, the microwave frequency band signal of 2 road single carriers, f are produced1It is chosen as：
42.565GHz, f2It is chosen as：47.3GHz；The baseband signal of the N roads two spaces stream of N number of emitter baseband processing unit generation
The signal of the single carrier microwave frequency band of N roads two spaces stream is produced using the above method respectively.
(2) signal of the microwave frequency band of N number of carrier wave of two spaces stream is input into the different inputs of respective OMT respectively, warp
The signal that N number of transmitting antenna can just send the multicarrier microwave frequency band of 2 road spatial flows is connected after crossing OMT synthesis.Per road-load ripple
Double space stream signal sent using antenna, N roads single carrier needs N number of antenna to be transmitted, during 2 carrier schemes, 2 loads
Ripple needs 2 transmitting antennas.
(3) receiver receives the signal of the microwave frequency band of multicarrier from N roots reception antenna, when implementing 2 carrier schemes, from 2
The microwave frequency band signal of 2 carrier waves, wherein f are received at root antenna1It is chosen as：42.565GHz, f2It is chosen as：47.3GHz, the signal
Per filter for receiver all the way, filter for receiver isolates respective single carrier microwave frequency band signal, then is input into OMT for input,
OMT isolates the microwave frequency band F of the single carrier of 2 road spatial flows of cross polarization2Signal, F2Can be 45GHz frequency ranges.
(4) will per road single carrier microwave frequency band signal microwave down coversion after produce F1The radiofrequency signal of frequency range, F1It is chosen as
5.8GHz, the signal is filtered by radio frequency signal channel wave filter, produces clean single carrier radiofrequency signal, channel filtering
The bandwidth of device is chosen as 80MHz, and the signal input i/q demodulator then is demodulated into generation baseband signal, and baseband signal is defeated
Enter receiver baseband processing unit to be processed.
As shown in Fig. 2 a kind of multi-carrier communication apparatus of tdd mode mimo wireless communication system, including at N number of emitter
Line of reasoning footpath and N number of receiver processing path；Sent out including emitter baseband processing unit 1, radio frequency in each transmitter processes path
Penetrate machine processing unit 2, microwave frequency band upconversion process unit 3, emitter orthomode coupler 4, transmitter filter 5 and transmitting
Antenna 6；Each receiver processing path includes receiver baseband processing unit 10, radio-frequency transmitter processing unit 20, microwave
Frequency range frequency conversion processing unit 30, receiver orthomode coupler 40, filter for receiver 50 and reception antenna 60.
Emitter baseband processing unit 1, receiver baseband processing unit 10, radio frequency sending set processing unit 2, radio frequency reception
Machine processing unit 20, microwave frequency band upconversion process unit 3, microwave frequency band frequency conversion processing unit 30 include two signals respectively
Treatment subpath, each signal transacting subpath is used for the treatment of spatial flow signal all the way.
The baseband signal of the two spaces stream that emitter baseband processing unit 1 is produced is exported to radio frequency sending set treatment respectively
Two signal transacting subpaths of unit 2, two signal transacting subpaths of radio frequency sending set processing unit 2 are respectively by two skies
Between flow baseband signal be converted to the single carrier radiofrequency signal of two spaces stream and export respectively to microwave frequency band upconversion process
Two signal transacting subpaths of unit 3, the frequency of the N roads single carrier radiofrequency signal of N number of output of radio frequency sending set processing unit 2
It is identical, frequency range F1It is less than 6GHz frequency ranges；Microwave frequency band upconversion process unit 3 is by the single carrier radiofrequency signal of two spaces stream
The single carrier microwave frequency band signal of two spaces stream is converted to, the N roads of N number of output of microwave frequency band upconversion process unit 3 are different
The single carrier microwave frequency band signal of frequency, frequency range F2It is more than 10GHz microwave frequency bands, the frequency of N roads single carrier microwave frequency band signal
Rate is respectively f1..., fN；Single load of the two spaces stream of the signal transacting subpath output of microwave frequency band upconversion process unit 3
Ripple microwave frequency band signal synthesizes the double space stream single carrier microwave frequency band of output cross polarization by emitter orthomode coupler 4
Signal is sent after being filtered to transmitter filter 5 by transmitting antenna 6.
Reception antenna 60 is received receiver the signal output of the double space stream microwave frequency band of the cross polarization of multicarrier
To filter for receiver 50, filter for receiver 50 exports the double space stream single carrier microwave frequency band of cross polarization after being filtered
Signal is to receiver orthomode coupler 40；Receiver orthomode coupler 40 is by the double space stream single carrier microwave of cross polarization
The single carrier microwave frequency band signal that frequency band signals are separated into two spaces stream is exported to microwave frequency band frequency conversion processing unit respectively
30 two signal transacting subpaths, microwave frequency band frequency conversion processing unit 30 believes the single carrier microwave frequency band of two spaces stream
Number be converted to the single carrier radiofrequency signal of two spaces stream and export to radio-frequency transmitter processing unit 20, radio-frequency transmitter treatment
The single carrier radiofrequency signal of two spaces stream is converted into unit 20 baseband signal of two spaces stream, and is exported to receiver base
Tape handling unit 10.
Fig. 3 and Fig. 4 give the present embodiment specific structural representation, process subpath with one of signal all the way below
Specifically describe the annexation and the transitive relation of signal of Radio frequency Processing Unit, RF Processing Unit and microwave frequency band frequency-conversion processing part：
One treatment subpath of radio frequency sending set processing unit 2：Baseband signal is changed by digital analog converter 21
For i/q signal is exported, i/q signal is filtered respectively through two analog intermediate frequency wave filters, 22, two analog intermediate frequency amplifiers 23
Ripple and amplify after be input into be modulated to radiofrequency signal to I/Q modulators 24 after be input into again variable gain amplifier 25 be amplified it is rear defeated
Go out single carrier radiofrequency signal.
One treatment subpath of microwave frequency band upconversion process unit 3：The output single carrier of variable gain amplifier 25 is penetrated
Frequency signal input radio frequency signal upconverter 32 after radio-frequency signal filters 31 are filtered, is carried out with microwave frequency band local oscillation signal
Microwave frequency band signal output is up-converted to after mixing, then is filtered by microwave frequency band traffic filter 33, power amplifier 34
Output single carrier microwave frequency band signal after ripple and power amplification.
One treatment subpath of microwave frequency band frequency conversion processing unit 30：Single carrier microwave frequency band signal is by low noise
Amplifier 301 be input into after low noise amplification after microwave frequency band traffic filter 302 is filtered and is input into again under microwave frequency band signal
Frequency converter 303, down-converts to radiofrequency signal output after being mixed with microwave frequency band local oscillation signal, then by radio frequency signal channel
Wave filter 304 is filtered rear output single carrier radiofrequency signal.
One treatment subpath of radio-frequency transmitter processing unit 20：The single carrier of the output of above-mentioned channel model 304 is penetrated
Frequency signal is input into i/q demodulator 202 and is demodulated after amplifier 201 amplifies, and exports i/q signal, and i/q signal is respectively through two
203, two analog intermediate frequency wave filters 204 of individual variable gain amplifier are amplified and are input into analog-digital converter after filtering
205 are converted to output after baseband signal.
The separation and Extraction of multi-carrier signal is separated by different carrier antennas, transmitter filter 5, filter for receiver
50th, channel model 304 comes together to complete.Transmitter filter 5 and filter for receiver 50 design one of same carrier frequencies
Sample, transmitter filter 5 is the spurious signal for filtering spurious signal, including other carrier wave frequency ranges, prevents from disturbing other carrier waves
Receiver and other wireless devices, different carrier antennas consider equipment size after separating, and the distance between them can be closer, connects
Receipts machine wave filter 50 needs to filter the transmitter signal interference of other carrier waves and other wireless device out-of-band interference signals, prevents
Only receives link saturation receiver sensitivity reduction.
When 2 carrier schemes of implementation are described below between transmitter filter 5, filter for receiver 50, different carrier antennas
Isolation, channel model 304, emitter orthomode coupler 4 and receiver orthogonal mode coupling between isolation, same carrier wave dual-mode antenna
The parameter selection of clutch 40, wherein, the transmitter filter 5 of same carrier wave is launched as the design of filter for receiver 50
As the design of machine orthomode coupler 4 and receiver orthomode coupler 40.f1Elect as：42.565GHz, f2Elect as：
47.3GHz；F1Elect 5.8GHz as；Single carrier microwave frequency band signal bandwidth：80MHz, BBP selection IEEE802.11ac
The baseband processing chip of technical specification.
The degree of suppression D of transmitter filter 5 or filter for receiver 50 to adjacent carrier1, different carrier waves antenna spacing
From degree D2D is isolated into and between same carrier wave dual-mode antenna3Design determined according to above-mentioned formula 1 to formula 6.Wherein, receiver
Noise floor：- 174dBm/Hz, after radio-frequency signal filters 31, microwave frequency band traffic filter 33 are filtered, emitter is micro-
Spurious signal level of the single-carrier signal of wave frequency section upconversion process unit output at another adjacent carrier wave frequency range：
P1=-134dBm/Hz, the single carrier maximum input signal of receiver microwave frequency band frequency conversion processing unit：P2=-20dBm, connects
The maximum input of the single carrier of receipts machine microwave frequency band frequency conversion processing unit does not damage signal level：P3=2dBm, transmitter antenna
Mouth single-carrier signal output level：Ptx=20dBm, the channel model 304 in microwave frequency band frequency conversion processing unit is adjacent
The degree of suppression of carrier wave is：A1=50dB, the microwave frequency band traffic filter 302 in microwave frequency band frequency conversion processing unit is adjacent
The degree of suppression of carrier wave is：A2=30dB, single carrier microwave frequency band signal bandwidth：B=80MHz.
According to formula 4 and formula 6, D1+D2>=49, D may be selected1>=29dB, different intercarrier antennas isolate D2≥20dB；
Antenna isolation D between same carrier wave3≥18dB。
The bandwidth of transmitter filter 5 can be more than single carrier channel bandwidth, and its bandwidth selection is according to millimeter wave frequency band F2With
The insertion loss of wave filter determines, is chosen as 2% of carrier wave or so width.It is to use filter for receiver that single carrier is separated
50 and channel model 304 come together complete, the bandwidth of each transmitter filter 5 elects 1080MHz as in 2 carrier schemes, in
Frequency of heart is respectively 42.565GHz and 47.3GHz.
Channel model 304, for completing the separation of multi-carrier signal, channel model together with filter for receiver 50
Frequency range elect 5.8GHz as, the transceiver of each carrier wave is the same, the bandwidth of channel model 304 in the frequency of the frequency range
It is the channel width of single carrier radiofrequency signal, its degree of suppression at adjacent carrier is：A1DB, the present embodiment design A1=
50dB。
Orthomode coupler, also referred to as orthomode transducer or bimodulus converter, for separating or synthesizing two orthogonal poles
Change the device of ripple, can be used polarised direction different and mutually isolated channel on same frequency under solution sighting distance (LOS) environment
2 problems of spatial flow of transmission.It is orthogonal as the design of emitter orthomode coupler 4 and receiver orthomode coupler 40
Mode coupler has three physical ports, and public port is connected with antenna, and two other electrical port is respectively allocated to 2 spaces
The transceiver of stream.Orthomode coupler may be selected circle common waveguide diaphragm branch design, as shown in figure 5, using uniform cut-off
Public circular waveguide, the insertion of diaphragm divides cross section equally.Diaphragm area (or local) and branch's ripple after rectangle branch-waveguide
Lead overlap, Waveguide branching is located at center of the common waveguide relative to the vertical sidewall of diaphragm, the wall wide of branch-waveguide typically with public affairs
The longitudinal axis of waveguide is conllinear altogether.It is added to the TE of public port10Mould signal is divided into two equal portions by membrane areas in the porch of diaphragm, then
Reconfigured in subsequent waveguide.Orthogonal TE01Mould disappears and reflects in diaphragm area, is finally coupled in branch-waveguide.
Two kinds of reflection losses of polarized wave are more than 20dB, and isolation is more than 40dB.
The QCA9892 of the optional Qualcomm of baseband signal processor+5.8GHz RF transceivers (Qualcomm) in Fig. 3
Or the BCM4352 of company of Botong (Broadcom), the QCA9558 of the optional QualCom company (Qualcomm) of network processing unit.
The above is only the preferred embodiment of the present invention, for those skilled in the art,
Without departing from the principles of the invention, any modification, equivalent substitution and improvements made etc. also should be regarded as protection model of the invention
Enclose.
Claims (9)
1. a kind of wireless multi-carrier communications method of tdd mode mimo wireless communication system, the wireless communication system has N roadbed bands
Signal, two spaces stream signal is included per roadbed band signal, wherein, N is the natural number more than 1, it is characterised in that the method is led to
The mode of operation of TDD is realized in the separation for crossing transmitting antenna and reception antenna, steps of the method are：
Emitter up-converts to the baseband signal per two spaces stream all the way after the single carrier radiofrequency signal of two spaces stream again
The double space stream single carrier of single channel cross polarization is synthesized after the single carrier microwave frequency band signal for up-converting to two spaces stream again
Microwave frequency band signal is sent by transmitting antenna, the N roads cross polarization that the baseband signal of N roads two spaces stream is produced it is double
The single carrier microwave frequency band signal of spatial flow different frequency is sent by N number of transmitting antenna；
Receiver leads to the signal of the double space stream microwave frequency band of the cross polarization of the N number of carrier wave received from N number of reception antenna
Cross N number of wave filter and different carrier waves different using the double space stream that the cross polarization of N roads is isolated in the isolation that different aerial band is come
The single carrier microwave frequency band signal of frequency, then will be per the double space stream single carrier microwave frequency band Signal separator of cross polarization all the way
Lower change again after the single carrier radiofrequency signal of two spaces stream is down-converted to after the single carrier microwave frequency band signal of two spaces stream again
Frequency is the baseband signal of two spaces stream.
2. the wireless multi-carrier communications method of tdd mode mimo wireless communication system as claimed in claim 1, it is characterised in that：
The emitter will up-convert to the single carrier radiofrequency signal of two spaces stream per the baseband signal of two spaces stream all the way
The double space stream list of single channel cross polarization is synthesized after the single carrier microwave frequency band signal for up-converting to two spaces stream again afterwards again
The step of carrier wave microwave frequency band signal is sent by a transmitting antenna be：
1.1) a spatial flow signal of each roadbed band signal produces single carrier radio frequency to believe by I/Q modulators upconversion process
Number, higher frequency section is upconverted to after the filtering of single carrier radiofrequency signal again and produces single carrier microwave frequency band signal；Baseband signal it is another
One spatial flow signal produces the single carrier microwave frequency band signal of another spatial flow using same method；
1.2) the single carrier microwave frequency band signal of two spaces stream synthesizes the double of single channel cross polarization by orthomode coupler
Sent by a transmitting antenna after spatial flow single carrier microwave frequency band signal.
3. the wireless multi-carrier communications method of tdd mode mimo wireless communication system as claimed in claim 1, it is characterised in that：
Described will be the single carrier of two spaces stream per the double space stream single carrier microwave frequency band Signal separator of cross polarization all the way
The base of two spaces stream is down-converted to after the single carrier radiofrequency signal for down-converting to two spaces stream after microwave frequency band signal again again
The step of band signal is：
2.1) receiver will be divided per the double space stream single carrier microwave frequency band signal of cross polarization all the way by orthomode coupler
From the single carrier microwave frequency band signal for two spaces stream；
2.2) by step 2.1) in two spaces stream single carrier microwave frequency band signal each spatial flow single carrier it is micro-
Wave frequency segment signal down-converts to single carrier radiofrequency signal, is demodulated by i/q demodulator again after the filtering of single carrier radiofrequency signal and produced
Baseband signal.
4. the wireless multi-carrier communications method of tdd mode mimo wireless communication system as claimed in claim 1, it is characterised in that：
The frequency range of the single carrier radiofrequency signal is the frequency range less than 6GHz, and the frequency range of the single carrier microwave frequency band signal is
The frequency range of more than 10GHz.
5. it is a kind of using as described in claim 1-4 any one tdd mode mimo wireless communication system multi-carrier communication side
The multi-carrier communication apparatus of the tdd mode mimo wireless communication system of method, it is characterised in that including N number of transmitter processes path
With N number of receiver processing path；Each transmitter processes path includes an emitter baseband processing unit, a radio frequency hair
Penetrate machine processing unit, microwave frequency band upconversion process unit, emitter orthomode coupler, an emitter filtering
Device and a transmitting antenna；Each receiver processing path includes receiver baseband processing unit, a radio frequency reception
Machine processing unit, microwave frequency band frequency conversion processing unit, receiver orthomode coupler, a filter for receiver
With a reception antenna；
At the emitter baseband processing unit, receiver baseband processing unit, radio frequency sending set processing unit, radio-frequency transmitter
Reason unit, microwave frequency band upconversion process unit, microwave frequency band frequency conversion processing unit include two sub- roads of signal transacting respectively
Footpath, each signal transacting subpath is used for the treatment of spatial flow signal all the way；
The emitter baseband processing unit produces one group of baseband signal of two spaces stream, and exports to radio frequency sending set treatment
Unit；
The input of the radio frequency sending set processing unit is connected with the output end of emitter baseband processing unit, for by two
The baseband signal of spatial flow is converted into the single carrier radiofrequency signal of two spaces stream, and exports to microwave frequency band upconversion process list
Unit；
The input of the microwave frequency band upconversion process unit is connected with radio frequency sending set processing unit output end, for by two
The single carrier radiofrequency signal of individual spatial flow is converted into the single carrier microwave frequency band signal of two spaces stream；N number of transmitter processes road
The single carrier microwave frequency band signal of the different frequency of N number of microwave frequency band upconversion process unit output N roads two spaces stream in footpath；
Two inputs of the emitter orthomode coupler respectively with two signals of microwave frequency band upconversion process unit at
The output end connection of subpath is managed, the common port of emitter orthomode coupler is connected with transmitter filter, emitter filtering
Device is connected with transmitting antenna；Emitter orthomode coupler is used to synthesize the single carrier microwave frequency band signal of two spaces stream
The double space stream single carrier microwave frequency band signal of cross polarization, and export the double space stream single carrier Microwave Frequency of single channel cross polarization
Sent by transmitting antenna after segment signal to transmitter filter；
The input of the filter for receiver is connected with reception antenna, the double space of the cross polarization for antenna to be received
The signal for flowing multicarrier microwave frequency band is filtered, and exports the double space stream single carrier microwave frequency band signal of cross polarization to connecing
Receipts machine orthomode coupler；
The common port of the receiver orthomode coupler is connected with the output end of filter for receiver, two output ends respectively with
The input connection of two signal transacting subpaths of microwave frequency band frequency conversion processing unit, receiver orthomode coupler is used for
By the double space stream single carrier microwave frequency band Signal separator of single channel cross polarization for the single carrier microwave frequency band of two spaces stream is believed
Number and export respectively to two signal transacting subpaths of microwave frequency band frequency conversion processing unit；
The microwave frequency band frequency conversion processing unit is used to for the single carrier microwave frequency band signal of two spaces stream to be converted into two
The single carrier radiofrequency signal of spatial flow, and export to radio-frequency transmitter processing unit；
The input of the radio-frequency transmitter processing unit is connected with the output end of microwave frequency band frequency conversion processing unit, for inciting somebody to action
The single carrier radiofrequency signal of two spaces stream is converted into the baseband signal of two spaces stream, and exports to receiver Base-Band Processing list
Unit.
6. multi-carrier communication apparatus of tdd mode mimo wireless communication system as claimed in claim 5, it is characterised in that：
One signal transacting subpath of the microwave frequency band upconversion process unit includes：
Radio-frequency signal filters, the radio frequency letter that a signal transacting subpath for receiving radio frequency sending set processing unit is exported
Number, exported after being filtered；Radiofrequency signal upconverter, the radiofrequency signal for receiving radio-frequency signal filters output, uses
Microwave frequency band local oscillation signal is exported after radiofrequency signal is up-converted into microwave frequency band signal；Microwave frequency band traffic filter, is used for
The microwave frequency band signal of radiofrequency signal upconverter output is received, is exported after being filtered；And microwave frequency band signal power is put
Big device, the microwave frequency band signal for receiving the output of microwave frequency band traffic filter is exported after carrying out power amplification；
One signal transacting subpath of the microwave frequency band frequency conversion processing unit includes：
Microwave frequency band signal low-noise amplifier, the microwave frequency band signal for receiving transceiver toggle switch output, carries out low noise
Sound is exported after amplifying；Microwave frequency band traffic filter, for after the amplification for receiving the output of microwave frequency band signal low-noise amplifier
Microwave frequency band signal, after being filtered export；Microwave frequency band signal low-converter, for receiving microwave frequency band traffic filter
The microwave frequency band signal of output, exports after microwave frequency band signal is down-converted into radiofrequency signal using microwave frequency band local oscillation signal；
And radio frequency signal channel wave filter, the radiofrequency signal for receiving the output of microwave frequency band signal low-converter, after being filtered
Output.
7. multi-carrier communication apparatus of tdd mode mimo wireless communication system as claimed in claim 5, it is characterised in that：Institute
The frequency range for stating single carrier radiofrequency signal is the frequency range less than 6GHz, the frequency range of the single carrier microwave frequency band signal for 10GHz with
On frequency range.
8. multi-carrier communication apparatus of tdd mode mimo wireless communication system as claimed in claim 5, it is characterised in that：Institute
It is isolation or different loads between more than 29dB, the transmitting antenna of different carrier waves to the degree of suppression of adjacent carrier to state transmitter filter
Isolation is more than 20dB between the reception antenna of ripple, and more than 18dB is isolated between the reception antenna and transmitting antenna of same carrier wave.
9. multi-carrier communication apparatus of tdd mode mimo wireless communication system as claimed in claim 6, it is characterised in that：Institute
State degree of suppression D of the transmitter filter to adjacent carrier1, the reception of isolation or different carrier waves between the transmitting antenna of different carrier waves
Isolation between antennas D2, D is isolated between the reception antenna and transmitting antenna of same carrier wave3Determined according to equation below：
D1+D2≥183+P1Formula 2
Ptx-D3≤P3Formula 4
D1+D2≥Ptx-P2Formula 5
Ptx-(A1+A2+D2+D1The formula 6 of)≤- 174+10log (B)+60
Wherein, P1For emitter microwave frequency band upconversion process unit output single carrier microwave frequency band signal it is adjacent in addition
Spurious signal level at one carrier wave frequency range, P2It is the maximum input of the single carrier of receiver microwave frequency band frequency conversion processing unit
Signal level, P3For the maximum input of the single carrier of receiver microwave frequency band frequency conversion processing unit does not damage signal level, PtxFor
Emitter single carrier microwave frequency band signal output level, A1It is the radio frequency signal channel filter in microwave frequency band frequency conversion processing unit
Ripple device adjacent carrier degree of suppression, A2It is the microwave frequency band traffic filter in microwave frequency band frequency conversion processing unit adjacent
The degree of suppression of carrier wave, BMHz is single carrier microwave frequency band signal bandwidth.
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| CN106646386B (en) * | 2016-11-21 | 2019-05-17 | 北京无线电测量研究所 | A kind of multipolarization microwave launcher and method |
| CN108736902A (en) * | 2017-04-17 | 2018-11-02 | 东莞百电子有限公司 | A kind of novel combination S frequency ranges and KU frequency range tuners |
| CN106950561B (en) * | 2017-05-04 | 2020-01-21 | 成都零点科技有限公司 | Microwave measuring device, system and method |
| CN108768415A (en) * | 2018-05-22 | 2018-11-06 | Oppo广东移动通信有限公司 | Radio circuit, antenna module and electronic equipment |
| CN109100713B (en) * | 2018-07-06 | 2022-05-03 | 电子科技大学 | Cooperative microwave measuring device, system and method with clutter suppression function |
| CN108649971B (en) * | 2018-08-20 | 2020-07-07 | 维沃移动通信有限公司 | Terminal equipment |
| CN112468217A (en) * | 2020-11-24 | 2021-03-09 | 航天恒星科技有限公司 | Dual-channel satellite communication system for high-speed movement |
| CN115276691A (en) * | 2021-10-14 | 2022-11-01 | 神基科技股份有限公司 | Wireless signal receiving device and system |
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