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CN108737306A - communication based on frequency division multiplexing - Google Patents

communication based on frequency division multiplexing Download PDF

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Publication number
CN108737306A
CN108737306A CN201710245002.0A CN201710245002A CN108737306A CN 108737306 A CN108737306 A CN 108737306A CN 201710245002 A CN201710245002 A CN 201710245002A CN 108737306 A CN108737306 A CN 108737306A
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CN
China
Prior art keywords
signal
subcarrier
frequency interval
interference
frequency
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Granted
Application number
CN201710245002.0A
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Chinese (zh)
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CN108737306B (en
Inventor
汪勇刚
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Nokia Shanghai Bell Co Ltd
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Nokia Shanghai Bell Co Ltd
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Priority to CN201710245002.0A priority Critical patent/CN108737306B/en
Publication of CN108737306A publication Critical patent/CN108737306A/en
Application granted granted Critical
Publication of CN108737306B publication Critical patent/CN108737306B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/225—Arrangements affording multiple use of the transmission path using time-division multiplexing combined with the use of transition coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/26—Arrangements affording multiple use of the transmission path using time-division multiplexing combined with the use of different frequencies

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The realization of the disclosure provides a kind of scheme of the communication based on frequency division multiplexing.According to a kind of method implemented at communication equipment, determine estimated the first interference caused by the first signal at the receiving terminal of second signal in emitting while the first signal and the second signal and it is expected that the first signal receiving terminal second interference caused by second signal.First signal will be transmitted on the first subcarrier with first frequency interval, and second signal will be transmitted on the second subcarrier with second frequency interval.Second subcarrier is adjacent with the first subcarrier, and second frequency interval is different from first frequency interval.This method further includes generating the first transmission signal by removing the second interference from the first signal, and generate the second transmission signal by removing the first interference from second signal.This method further include multiplexing first transmission signal and second transmission signal for and meanwhile emit.

Description

Communication based on frequency division multiplexing
Technical field
The realization of the disclosure relates generally to the communication technology, and more particularly, to the communication based on frequency division multiplexing.
Background technology
In legacy communications system, various multiplexing technologies, such as may be used when being communicated with multiple receiving terminals in transmitting terminal Time division multiplexing (TDM), frequency division multiplexing (FDM) etc., to improve efficiency of transmission.In general, in same communication system, whole systems Bandwidth is divided into multiple subcarriers with identical frequency interval.In communication, going to the signal of different receiving terminals can draw It is transmitted on the one or more subcarriers divided.
In nearest Communication Development, new radio (NR) access technology is being studied, is being aimed in single technology The vertical communication service of wider range, such as machine-type communication (MTC), extensive MTC (mMTC), enhanced shifting are provided in frame Dynamic broadband (eMBB) communication, super reliable low latency communication (URLLC) etc..It has been proposed in new communication system using scalable Frequency interval.Scalable frequency interval refers to that subcarrier is with the quilt at different frequency interval for different receiving terminals and/or business It divides.Therefore, in same system, a part for whole system bandwidths is divided into the subcarrier with first frequency interval, And another part may be divided into the subcarrier with different second frequency intervals.
In the system of the scalable frequency interval with subcarrier, TDM and FDM still can be used for multiple transmission Multiplexing.In the multiplexing based on TDM, different time slots can be assigned to using the transmission at different frequency interval.Based on FDM Multiplexing in, different transmission is transmitted simultaneously on the subcarrier with different frequency interval.However, the multiplexing based on TDM The quality of service requirement of all business, requirement especially on time delay possibly can not be ensured.Multiplexing based on FDM can be supported With the business that different delay requires, and can also be with very high flexibility ratio for supporting with different business model, no With packet size and bandwidth requirement.Moreover, the system based on NR will be assigned broader system bandwidth, therefore answering using FDM With technology and beneficial.
Since the subcarrier only with identical frequency interval is just mutually orthogonal directions, there are different frequencies in band system band In the case of the subcarrier at interval, the multiplexing based on FDM will introduce interference problem.Therefore, it is necessary to a kind of solutions in multi-frequency The interference solution of communication based on FDM in the case of interval.
Invention content
According to the example implementation of the disclosure, a kind of scheme of the communication based on frequency division multiplexing is provided.
In the first aspect of the disclosure, a kind of method implemented at communication equipment is provided.This method includes determining It is expected in emitting while the first signal and the second signal at the receiving terminal of second signal first caused by the first signal Interference and it is expected that the second interference caused by second signal at the receiving terminal of the first signal.First signal will be with the first frequency It is transmitted on first subcarrier at rate interval, and second signal will be passed on the second subcarrier with second frequency interval It is defeated.Second subcarrier is adjacent with the first subcarrier, and second frequency interval is different from first frequency interval.This method further includes The first transmission signal is generated by removing the second interference from the first signal, and dry by removing first from second signal It disturbs to generate the second transmission signal.This method further include multiplexing first transmission signal and second transmission signal for and meanwhile send out It penetrates.
In the second aspect of the disclosure, a kind of method implemented at communication equipment is provided.This method is included in tool There is first received over subcarriers first at first frequency interval to receive signal.First receives signal and emits the first of equipment transmission Signal is associated.First signal is transmitted simultaneously with the second signal on the second subcarrier with second frequency interval, the Two subcarriers are adjacent with the first subcarrier, and second frequency interval is different from first frequency interval.First, which receives signal, includes The interference caused by second signal and the transmission signal generated from the first signal removal interference by transmitting equipment.This method It is included in processing first in the case of not removing interference and receives signal to obtain the first signal.
In the third aspect of the disclosure, a kind of communication equipment is provided.The communication equipment includes processor；And with place The memory of device coupling is managed, memory, which has, is stored in instruction therein, and instruction holds transmitting equipment when being executed by processor Action is made.These actions include determining the receiving terminal being expected in transmitting while the first signal and the second signal in second signal Place caused by the first signal first interference and it is expected that the first signal receiving terminal caused by second signal second interference. First signal will be transmitted on the first subcarrier with first frequency interval, and second signal will be with second frequency It is transmitted on second subcarrier at interval.Second subcarrier is adjacent with the first subcarrier, and second frequency interval is different from the One frequency interval.The action further includes generating the first transmission signal, Yi Jitong by removing the second interference from the first signal It crosses and removes the first interference from second signal to generate the second transmission signal.The action further includes the first transmission signal of multiplexing and the Two transmit signals for emitting simultaneously.
In the fourth aspect of the disclosure, a kind of communication equipment is provided.The communication equipment includes processor；And with place The memory of device coupling is managed, memory, which has, is stored in instruction therein, and instruction holds transmitting equipment when being executed by processor Action is made.These actions are included in the first received over subcarriers first with first frequency interval and receive signal.First receives Signal is associated with the first signal of transmitting equipment transmission.First signal on the second subcarrier with second frequency interval Second signal be transmitted simultaneously, the second subcarrier is adjacent with the first subcarrier, and second frequency interval be different from first frequency Rate interval.First, which receives signal, includes the interference caused by second signal and removes interference from the first signal by transmitting equipment And the transmission signal generated.The action be included in do not remove interference in the case of processing first receive signal to obtain the first letter Number.
In the 5th aspect of the disclosure, a kind of computer-readable medium is provided.It is stored on the computer-readable medium There are computer executable instructions.Computer executable instructions make one or more processing when executed by one or more processors Device executes the step of method according to first aspect.
In the 6th aspect of the disclosure, a kind of computer-readable medium is provided.It is stored on the computer-readable medium There are computer executable instructions.Computer executable instructions make one or more processing when executed by one or more processors Device executes the step of method according to second aspect.
It should be appreciated that the content described in Summary is not intended to limit the crucial or important of disclosure realization Feature, it is also non-for limiting the scope of the present disclosure.The other feature of the disclosure will be easy to understand by description below.
Description of the drawings
It refers to the following detailed description in conjunction with the accompanying drawings, the above and other feature, advantage and aspect that the disclosure is respectively realized will It becomes readily apparent from.In the accompanying drawings, same or analogous reference numeral indicates same or analogous element, wherein：
Fig. 1 is the schematic diagram of the realization example network environment that can be implemented in it of disclosure description；
Fig. 2A shows the schematic diagram of the subcarrier with different frequency interval in frequency domain；
Fig. 2 B show distribution of the signal transmitted on the subcarrier with different frequency interval in time domain and frequency domain；
Fig. 3 A and Fig. 3 B show the schematic diagram of the interference between the adjacent sub-carrier with different frequency interval；
Fig. 4 shows the schematic block diagram of the system of some communications based on frequency division multiplexing realized according to the disclosure；
Fig. 5 shows the schematic block diagram of the encoder in the communication equipment realized according to some of the disclosure；
Fig. 6 according to the disclosure some realize the communications based on frequency division multiplexing process flow chart；
Fig. 7 according to the disclosure other realize the communications based on frequency division multiplexing process flow chart；
Fig. 8 shows the block diagram of some devices realized according to the disclosure；
Fig. 9 shows the block diagram of other devices realized according to the disclosure；And
Figure 10 shows the simplified block diagram of the equipment for the realization for being suitable for realizing the disclosure.
In all the appended drawings, same or similar reference number indicates same or similar element.
Specific implementation
The realization of the disclosure is more fully described below with reference to accompanying drawings.Although showing certain realities of the disclosure in attached drawing It is existing, it should be understood that, the disclosure can be realized by various forms, and should not be construed as being limited to explain here The realization stated, it is in order to more thorough and be fully understood by the disclosure to provide these realizations on the contrary.It should be understood that the disclosure Attached drawing and being given for example only property of realization effect, be not intended to limit the protection domain of the disclosure.
In the description of the realization of the disclosure, term " comprising " and its similar term should be understood as that opening includes, i.e., " including but not limited to ".Term "based" should be understood as " being based at least partially on ".Term " realization " or " realization " It should be understood as " at least one realization ".Term " first ", " second " etc. may refer to different or identical object.Hereafter It is also possible that other specific and implicit definition.
Term " terminal device " as used herein or " user equipment " (UE) be refer between base station or each other it Between any terminal device for carrying out wireless communication.As an example, terminal device may include mobile terminal (MT), subscriber stations (SS), portable subscriber platform (PSS), mobile station (MS) or access terminal (AT) and vehicle-mounted above equipment.Terminal device Can be any type of mobile terminal, fixed terminal or portable terminal, including cell phone, website, unit, equipment, more Media computer, multimedia tablet, internet node, communicator, desktop computer, laptop computer, notebook computer, Netbook computer, tablet computer, PCS Personal Communications System (PCS) equipment, personal navigation equipment, personal digital assistant (PDA), Audio/video player, digital camera/video camera, positioning device, television receiver, radio broadcast receiver, e-book are set Standby, game station, intelligent electric meter, gauge or the other equipment that can be used for communicating or above-mentioned arbitrary combination.In the disclosure Context in, to discuss convenient purpose, term " terminal device " and " user equipment " may be used interchangeably.
Term " network equipment " as used herein refers to other realities with specific function in base station or communication network Body or node." base station " (BS) can indicate node B (NodeB either NB), evolution node B (eNodeB or eNB), long-range nothing Line electric unit (RRU), radio-frequency maser (RH), remote radio heads (RRH), repeater or such as femto base station, femto base The low power nodes etc. stood etc..The coverage area of base station, the geographic area that can provide service are referred to as cell.In this public affairs In the context opened, for the purpose for discussing convenient, term " network equipment " and " base station " may be used interchangeably, and may be main Using eNB as the example of the network equipment.Herein, " network equipment " and " terminal device " can be said to communication equipment.
In a communications system, a communication equipment can transmit information or different to transmission to other multiple communication equipments Information.Fig. 1 describes the network environment 100 that the realization of the disclosure can be implemented wherein.It is multiple in the environment 100 Terminal device 120-1 to 120-3 is in the serving cell 112 of the network equipment 110 and is serviced by the network equipment 110.Although Three terminal devices of mobile phone form are shown in Fig. 1, but the network equipment 110 can service more or fewer terminals Equipment, and the type of the terminal device serviced can it is identical or different (such as other kinds of terminal device be also can Can).Hereinafter, terminal device 120-1 to 120-3 is collectively referred to as terminal device 120 or respectively with 120 table of terminal device Show.
The network equipment 110 can be communicated with terminal device 120, to transmit various businesses data, control information etc. Deng.Transmitting terminal can be the network equipment 110, and receiving terminal can be one or more terminal devices 120, and such transmission can To be referred to as downlink (DL) transmission.In other situation, transmitting terminal can be terminal device 120 and receiving terminal can To be the network equipment 110, such transmission can be referred to as uplink (UL) transmission.In addition, terminal device 120 can be with Information is transmitted to one or more terminal devices 120, this is referred to as device-to-device (D2D) transmission.Certainly, although not shown Go out, but the network equipment 110 can also be communicated by backhaul (backhaul) interface etc. with other network equipments.
Communication in network environment 100 can be implemented according to any communication protocol appropriate, including but not limited to, the It is the cellular communication protocols such as a generation (1G), the second generation (2G), the third generation (3G), forth generation (4G) and the 5th generation (5G), such as electrical With the wireless LAN communication agreement of Electronic Engineering Association (IEEE) 802.11 etc., and/or be currently known or develop in the future Any other agreement.
As mentioned above, in a communications system, it is understood that there may be for the multiple of different receiving terminals or different business Different sub-carrier interval configures, and each subcarrier spacing configuration is associated with a frequency interval.Therefore, the whole of same system The a part of of system bandwidth can be divided into the subcarrier with first frequency interval, and another part may be divided into tool There is the subcarrier at different second frequency intervals.For example, the frequency interval (being expressed as f_sc) of subcarrier can be by following equation (such equation is calculated is also referred to as numerology in english literature) provides：F_sc=15*2nKHz, wherein n can Different receiving terminals and/or business are taken with different nonnegative integers, to obtain corresponding different frequency interval f_sc.This shows In example, the baseline of frequency interval is 15kHz, and the ratio between different frequency interval can be 2n.In other examples, different frequencies Rate interval can also be based on specific zoom factor (for example, zoom factor N=2n) determine.For example, can be by between basic frequency Every 15kHz and zoom factor N=2nTo calculate to obtain the frequency interval of 3.75kHz, 7.5kHz, 30kHz, 60kHz etc..
For example, in the example of Fig. 2A, the frequency of whole system bandwidths can be assigned by going to the transmission of the first receiving terminal A Section (F1 to F2) 210, wherein f_sc1 is divided between the first frequency of each subcarrier, and the transmission for going to the second receiving terminal B can To be assigned the frequency zone (F2 to F3) 220 of whole bandwidth, wherein being divided into f_sc2 between the second frequency of each subcarrier.Frequently Rate interval f_sc2 is different from f_sc1, for example, f_sc2 is more than f_sc1.It should be appreciated that the son for being assigned to different receiving terminals carries The number of wave can be one or more.
In the system with different frequency interval, transmitting terminal, can be in order to be multiplexed the transmission based on different frequency interval Using both time division multiplexing (TDM) and frequency division multiplexing (FDM).Since FDM in the advantage of time delay and flexibility ratio etc. and is examined Consider the use (such as in system based on new radio access technologies) of broader bandwidth from now on, FDM is more conducive to such It is used in system.However, since different sub-carrier there may be different frequency intervals, it is unable to ensure between subcarrier It is orthogonal, so as to cause the interference between interference adjacent sub-carrier.Such interference can be referred to as multi-subcarrier compartment Interference, because interference is caused since the difference of the frequency interval for subcarrier determines criterion.
Fig. 2 B show to work as and be received to the first receiving terminal and second on the subcarrier of the frequency zone 220 and 210 of Fig. 2A When the first signal 212 and second signal 222 are transmitted in end respectively, distribution of these signals in time domain and frequency domain.In this example, One frequency interval f_sc1 is twice of second frequency interval f_sc2.Therefore, in the time domain, signal can be transmitted in same time 212 two symbols A1 and A2, and a symbol B of signal 212 can be transmitted.In frequency division multiplexing, the first signal 212 Symbol A1 and A2 and the symbol B of second signal 222 can be concomitantly transferred to the first and second receiving terminals by transmitting terminal, for example existed Same transmission time slot is transmitted.
Due to frequency interval difference, receiving terminal with the corresponding parameter of a certain frequency interval (such as in Fourier transformation Counted using corresponding Fourier transformation) execute time domain to frequency-domain transform after, in the close frequency F2 for transmitting the first signal 212 The subcarrier of subcarrier and the close frequency F2 of transmission second signal 222 will interfere, therefore will be observed that at receiving terminal It is outer that the frequency spectrum of corresponding signal is diffused into band.For example, as shown in Figure 3A, at the second receiving terminal, domain to frequency domain becomes when being executed After alternatively, observe that the reception signal 320 at the first receiving terminal (is represented as RA) energy leakage to the second receiving terminal, to The transmission signal 310 for being expected to receive to the second receiving terminal is caused (to be represented as TB) interference 322 (be represented as IA), it causes The distortion of the reception signal of second receiving terminal.Similarly, as shown in Figure 3B, when being executed after domain to frequency-domain transform, first It can also be observed that the reception signal 330 of the second receiving terminal (is represented as R at receiving terminalB) energy leakage to first receive End causes (to be represented as T to the expected signal 340 receivedA) interference 332 (be represented as IB)。
According to above-mentioned analysis it is found that the communication needs based on FDM solve the problems, such as interference.In the routine that can solve interference In communication system, it is available that there are two schemes.A kind of scheme is analogous to the narrowband Internet of Things in current long term evolution (LTE) The use of guard band (guard band) used in net (NB-IoT).Guard band can be inserted in different frequency It between the subcarrier at interval, such as is inserted in before the frequency zone 210 and 220 of Fig. 2A, to reduce mutual interference And/or alleviation is to the limited degree of required frequency spectrum.For effective AF panel, guard band between subcarrier it is big Small to depend on several factors, the signal carried in the calculating parameter of such as frequency interval, the subcarrier at different frequency interval connects Receive total bandwidth and communication performance requirement used in power difference, the configuration of different sub-carrier interval.In general, pre- for guard band institute The frequency spectrum resource stayed is about in 6*15kHz, such as in current LTE NB IoT systems.Between the configuration of different sub-carrier interval Excessive guard band will greatly reduce the availability of frequency spectrum.
Another scheme is to inhibit to interfere by the way of adding window and filtering.In order to reduce interference, can limit each The emission spectrum of sub-carrier frequencies interval configuration, such as, it is desirable that better spectral roll-off.Adding window and filtering are can to improve transmitting End and means of the receiving terminal about spectral roll-off characteristic.However, this will require to configure each sub-carrier frequencies interval, receive The calculating magnitude of time-domain filtering in end will be significantly higher than time-frequency or frequency-time domain transformation.This will increase system complexity.Secondly, add Window and filtering will all cause the signal distortion on the shoulder of the frequency zone of different receiving terminals, such distortion using high contrast System, such as 64, when 128,256 ranks or more quadrature amplitude modulation (QAM), are more notable.
Therefore, it is desirable to there is improved plan dry in the system based on FDM with multi-subcarrier interval for solving Disturb problem.The realization of the disclosure provides a kind of scheme and is used to solve some in above-mentioned or other potential problems.In the program In, the communication equipment of transmitting terminal estimate two or more signals to be launched other signals receiving terminal by caused interference, And the interference as caused by other signals is removed from each signal.The signal after interference is removed to be re-used then while sending out It penetrates.Since the communication equipment of transmitting terminal is estimated and from removing interfering with each other between signal in signal, receiving terminal it is logical After letter equipment receives signal, it may not need and execute inter-signal interference estimation and remove.The case where not considering other interference Under, the communication equipment of receiving terminal can will receive signal and be determined directly as desired signal.Certainly, in other implementations, receiving terminal The collection of letters number can also be docked and execute other conventional treatments, such as estimating and remove channel disturbance.
It can be seen that according to the technical solution of the disclosure, interference is estimated by the equipment of transmitting terminal and removed in advance.It is such It is referred to as dirty paper code (dirty paper coding) in concept theory.The scene that dirty paper code is related to is：If a piece of paper On write many contents or had how many stains (transmitting terminal known disturbances information), i.e., dirty paper are realized Continue to write information (at transmitting terminal) on this paper and so that these information (connect in the case where unknown ink color is with position At receiving end) it is still readable.According to dirty paper code, in the technical solution of the disclosure, since the communication equipment of transmitting terminal can obtain Know all information of original signal, therefore can be estimated from these signals caused by different frequency interval in receiving terminal The inter-signal interference of adjacent sub-carrier when reception.By the way that these interference are removed in advance, the communication equipment of receiving terminal will be not necessarily to after It is continuous to handle the interference of this part.
By the technical solution of the disclosure, solves the interference problem in the system based on FDM at multi-frequency interval.Phase Compared with the conventional interference solution based on protection interval, the scheme of the disclosure is not necessarily to consume for the purpose that interference solves Additional frequency spectrum resource, improves frequency efficiency.In addition, compared to the conventional scheme based on adding window and filtering, the disclosure Scheme it is more simple and without in shoulder shaping original signal, reduce system complexity and improve availability.
The technology of disclosure description can be used for various FDM systems, such as orthogonal frequency division multiplexing (OFDM).FDM will be whole System frequency is divided into multiple sub-bands, these sub-bands are also referred to as frequency band sound (tone), subcarrier, frequency band (bin) etc.. The basic thought of frequency division multiplexing is：By using the method that different frequency is modulated to multiple signals, make modulated each road Signal is staggered on frequency location, to achieve the purpose that multiple signals simultaneously in a band transmissions.Therefore, frequency division multiplexing Each road signal be overlapped in time and on frequency spectrum nonoverlapping signal.That is, the signal after being re-used is different It is concomitantly transmitted in frequency range.
The example implementation of the disclosure discussed more fully below.Fig. 4 shows the communication system realized according to some of the disclosure The schematic block diagram of system 400.System 400 includes the communication equipment 420 and 430 of the communication equipment 410 and receiving terminal of transmitting terminal.One In a example, communication equipment 410 it is expected to emit signal S to communication equipment 420AAnd emit another signal to communication equipment 430 SB.Hereinafter, it discusses for convenience, is transmitted to the signal S of communication equipment 420AIt is referred to as the first signal, and is transmitted to logical Believe the signal S of equipment 430BIt is referred to as second signal.In downlink communication, transmitting communication equipment 410 may, for example, be Fig. 1 In the network equipment 110, and receiving communication device 420,430 can be the terminal device 120 in Fig. 1.In other communications, Transmitting communication equipment 410 may, for example, be the terminal device 120 in Fig. 1, and receiving communication device 420,430 can be Fig. 1 In the network equipment 110 and/or terminal device 120.
According to the realization of the disclosure, communication equipment 410 is by the first signal SAWith second signal SBIt is multiple over different frequencies With and at the same time being transmitted to communication equipment 420 and 430.As used herein, " emit simultaneously " and refer to unlike signal Part or all of information is transmitted in same tranfer time (such as time slot).Such transmission is referred to as frequency division multiplexing.
In the communication based on frequency division multiplexing, communication equipment 410 will be on the first subcarrier with first frequency interval Transmit signal SAAnd S will be transmitted on the second subcarrier with second frequency intervalB.Second subcarrier and the first subcarrier It is adjacent, and second frequency interval is different from first frequency interval.For example, first frequency interval can be 30kHz, and the second frequency Rate interval can be 15kHz.Certainly, other frequency intervals are also possible.It in one example, can be according to f_sc=15* 2nKHz to calculate frequency interval f_sc for different receiving communication devices, and wherein n can be to different receiving communication devices and/or industry Business takes different nonnegative integers.Different zoom factor (such as zoom factor N=2 can also be usedn) determine different reception communications The frequency interval of equipment.In some implementations, second frequency interval is two multiple or first frequency at first frequency interval Interval is two multiple at second frequency interval.Certainly, the frequency interval of different receiving communication devices can be closed at other multiples System, or not at multiple proportion.In some implementations, the first and second signal SAAnd SBIt can be with corresponding frequencies interval It is transmitted on multiple subcarriers, but there are adjacent sub-carriers in these subcarriers.
As shown in figure 4, communication equipment 410 includes encoder 412,414, multiplexer 416 and transceiver 418.Encoder 412 For encoded first signal SA, and encoder 414 is used for encoded second signal SB.Due to the first and second signal SAAnd SB? Be launched on the subcarrier at different frequency interval, thus be difficult between these subcarriers it is mutually orthogonal, it is mutual to exist Interference.Such interference is can be referred to as the interference of multi-subcarrier compartment, frequency caused by due to different frequency interval Compartment interferes or inter-signal interference.In order to avoid the Interference Estimation of the docking collection of letters number of receiving communication device 420 and 430, lead to Believe that the encoder 412 and 414 of equipment 410 estimates interference of the other signal for the signal to be encoded, specifically between frequency Compartment interferes.
Specifically, the estimated receiving terminal in the first signal during the estimation of encoder 412 of communication equipment 410 emits at the same time By second signal S at (i.e. communication equipment 420)BIt is caused to the first signal SAInterference (can be described as the second interference, be expressed as IB).When calculating the second interference, encoder 412 is also by second signal SBAs input.During the estimation of encoder 414 emits at the same time It is expected that by the first signal S at the receiving terminal (i.e. communication equipment 430) of second signalAIt is caused to second signal SBInterference (can Referred to as first interference, is expressed as IA).When calculating the second interference, encoder 412 is also by the first signal SAAs input.Further Ground, encoder 412 is by from the first signal SAIt is middle to remove the second interference IBCome generate transmission signal (can be described as the first transmission signal, It is expressed as TA), encoder 414 is by from second signal SBIt is middle to remove the first interference IA(the second biography is can be described as to generate transmission signal Defeated signal, is expressed as TB).That is, transmission signal is equal to signal to be transmitted (SAOr SB) and interference difference.412 He of encoder 414 cataloged procedure will be discussed in detail following.
First transmission signal TAWith the second transmission signal TBMultiplexer 416 is provided to be multiplexed.Multiplexer 416 can be with By the first transmission signal TAIt is modulated to corresponding subcarrier (including first subcarrier), and signal T is transmitted by secondBIt is modulated to Corresponding subcarrier (including second subcarrier).Other processing can also be performed to realize that two transmission signals exist in multiplexer 416 The multiplexing of frequency domain.Signal through multiplexing is provided to transceiver 418 to be transmitted simultaneously in corresponding transmission time.
It introduces in further detail below in encoder 412 and 414 to the coded treatment of the first and second signals.When using not When the adjacent sub-carrier at same frequency interval executes communication, for different frequency interval, corresponding time-frequency will be used at receiving terminal Transformation parameter executes time-frequency conversion.For example, for the frequency interval of 30kHz, 1024 points of Fourier transformation will be used, and it is right The frequency interval of 15kHz will use 2048 points of Fourier transformation.Such change, which is changed commanders, generates interference.That is, interference refers to Be receiving terminal execute docking collect mail number time-frequency conversion when due to the unmatched time-frequency conversion parameter of adjacent sub-carrier It uses, generates the outer energy leakage of band for coming from adjacent sub-carrier.Such interference is also referred to as out-of-band interference (out-of- band interference).Due to the first and second frequency intervals difference, the first and second interference IAAnd IBMagnitude not yet Together.In some implementations, encoder 412 can be determined to the first signal SAIt is held for the time-frequency conversion parameter of second signal Signal when row transformation other than the frequency band of the first subcarrier, to interfere I as firstA.Encoder 414 can be determined to Binary signal SBWhen executing transformation for the time-frequency conversion parameter of the first signal signal other than the frequency band of the second subcarrier with As the second interference IB.Time domain can depend on the configuration of communication system to the specific converter technique of frequency domain.In some implementations, Time-frequency conversion may include Fast Fourier Transform (FFT) (FFT), and time-frequency conversion parameter includes Fourier transformation points.It should know Road, other time domains are also possible to frequency-domain transform, and can correspondingly determine out-of-band interference.
It is given below and determines the first and second signal SAAnd SBTo the specific example of mutual interference.Assuming that first and second Signal SAAnd SBIt is frequency-region signal, and assumes to be divided between first frequency for convenience of explanation twice of second frequency interval.When In domain representation, second signal SBA symbol (being represented as b) duration be equal to the first signal SATwo symbol (quilts It is expressed as a1 and a2), this is similar with example shown in Fig. 2 B.With in the communication process of communication equipment 420 and 430, according to dirty The principle of paper code, it is desirable to which the signal that receiving communication device 420 and 430 receives is as follows：
Wherein SbIndicate second signal SBA frequency domain symbol；TbIndicate symbol S after being handled by encoder 414bTransmission Symbol；Sa1And Sa2Indicate the first signal SATwo frequency domain symbols；Ta1And Ta2Symbol after being handled by encoder 412 is indicated respectively Sa1And Sa2Two frequency domain symbols；IaIt indicates in a transmission time slot by the first signal SARespective symbol Sa1And Sa2Cause Interference；Ib1And Ib2It indicates in same transmission time slot by second signal SBRespective symbol SbFirst part b1 and second Divide interference caused by b2.According to formula (1) it is found that the transmission signal that communication equipment 410 emits is done in experience multicarrier compartment After disturbing, the signal for it is expected transmitting originally can be equal to.
Interfere Ia、Ib1And Ib2It can be by causing the band external enwergy amount of the adjacent sub-carrier of interference to indicate.Assuming that being communicated receiving To the first signal S at equipment 420AThe time domain of execution to frequency-domain transform be 1024-FFT, and to second at receiving communication device 430 Signal SBThe time domain of execution to frequency-domain transform be 2048-FFT.Therefore, the out-of-band interference that encoder 412 and 414 calculates can be by It is expressed as：
Wherein taIndicate the first signal S in time domain to frequency-domain transformAThe time-domain sampling of time-domain symbol a1 and a2 (and be 2048)；tb1And tb2It is illustrated respectively in second signal S in time domain to frequency-domain transformBThe time-domain sampling of time-domain symbol b (and be 2048)；FFT2048() and FFT1024() indicates the operation of 2048-FFT and 1024-FFT respectively；And cut () indicates only to intercept The operation of the numerical value of out-of-band interference sampled point.According to formula (2) as can be seen that the first signal SAThe interference I of generationaIt is due to right First signal (its time-domain representation ta) become using time-frequency conversion parameter (i.e. 2048 points of FFT parameters) the execution FFT of second signal It changes and causes.Second signal SBThe interference of the distinct symbols a1 and a2 to the first signal generated is due to second signal (its Time-domain representation tb1And tb2) FFT transform is executed using the time-frequency conversion parameter (i.e. 1024 points of FFT parameters) of the first signal and is led It causes.
According to formula (1) and (2), encoder 412 and 414 can determine the first and second transmission signal TAAnd TBIt is as follows Transmit symbol：
Transmit symbol Ta1、Ta2And TbIt corresponds respectively to from symbol Sa1、Sa2And SbRemove the symbol after interference.
Various ways may be used and determine the out-of-band interference I generated during the time domain of signal is to frequency-domain transforma、Ib1With Ib2.In Interference Estimation, encoder 412 and 414 is it is known that S in frequency domainAAnd SB.In one implementation, it is counted to improve Speed is calculated, the process that iteration may be used in encoder 412 and 414 calculates interference.The iterative process can be based on above-mentioned formula (1) It is specific as follows to (3).
It is possible, firstly, to pass through S in encoder 414a1And Sa2EstimationAnd it then determinesIt is as follows：
Wherein IFFT () indicates inverse fast fourier transform, for executing frequency domain to time domain transformation；WithIt indicates from symbol Number Sa1And Sa2Convert the first time estimation of obtained time-domain representation；Indicate interference IaFirst time estimation；AndIt indicates With symbol SbThe first time estimation of corresponding transmission symbol.
It is then possible to pass through in encoder 412Estimation interferenceWithAnd it thereby determines thatWithSuch as Under：
Wherein interfereWithIt indicates to interfering Ib1And Ib2First time estimation, andWithIt indicates and symbol Sa1 And Sa2The first time estimation of corresponding transmission symbol.
InterferenceWithCan signal be transmitted for determining by encoder 414 and 412, such as pass through formula (1) It determines.In order to further increase determining accuracy, can also continue to pass through in encoder 414WithCalculate interference Ia Second estimationAnd it thereby determines that, it is as follows：
WhereinWithIt indicates from symbol Sa1And Sa2Convert second of estimation of obtained time-domain representation；Indicate interference IaSecond estimation；AndIt indicates and symbol SbSecond of estimation of corresponding transmission symbol.
Further, be based on formula (6) as a result, can be passed through in encoder 412 with recurring formula (5)Continue to estimate Meter interferenceWithAnd it thereby determines thatWithIt is as follows：
Wherein interfereWithIt indicates to interfering Ib1And Ib2Second estimation, andWithIt indicates and symbol Sa1 And Sa2Second of estimation of corresponding transmission symbol.
The interference of second of estimationWithIt can be by encoder 414 and 412 for determining transmission signal.By Above-mentioned iterative process it is found that the similar step corresponding with formula (4) of step corresponding to formula (6) repetition, and formula (7) correspondence The step of be formula (5) repetition.In some implementations, can also continue to be iteratively performed formula in encoder 414 and 412 (6) and the calculating of (7), to obtain the further estimation to interference.The realization of the disclosure is not limited in this respect.For One signal SAWith second signal SBOther symbols, can also similarly estimate interference, and execute interference remove.
Fig. 5 shows the exemplary construction of the interference determination process for executing above-mentioned iteration in encoder 412 and 414.Tool Body, in encoder 414, module 512 can be used for executing to the first signal SARespective symbol IFFT operations, such as it is public The operation of IFFT involved in formula (4) and (6).Module 514 can be used for executing the FFT operations to time-domain signal, such as formula (4) (6) operation of FFT involved in.In addition, module 516 can be used for executing the determination to out-of-band interference.Module 512 to 516 Operation can be repeatedly carried out, to determine the first signal SATo second signal SBFirst interference IA.It is determined by module 516 dry Disturb IAIt can be with second signal SBIt is entered combiner 518 together, so as to from second signal SBRemove the first interference IA, production Raw second transmission signal TB。
Similarly, in encoder 412, module 522 can be used for executing to second signal SBRespective symbol IFFT Operation, for example, IFFT involved in formula (5) and (7) operation.Module 524 can be used for executing the FFT operations to time-domain signal, Such as the operation of FFT involved in formula (5) and (7).In addition, module 526 can be used for executing the determination to out-of-band interference.Module 522 to 526 operation can be repeatedly carried out, to determine second signal SBTo the first signal SASecond interference IB.By module The 526 interference I determinedBIt can be with the first signal SAIt is entered combiner 528 together, so as to from the first signal SARemove the Two interference IB, generate the first transmission signal TA。
Process determining to interference about specific frequency interval, time-frequency conversion parameter and technology etc. is retouched above It states.It will be appreciated, however, that with other parameters, such as other frequency interval relationships, other time-frequency conversion parameters and technology In realization, interference can also be similarly calculated.It is, of course, also possible to be determined with different frequency interval using various other technologies Adjacent sub-carrier between interfere with each other.In addition, above with respect to the first and second signal SAAnd SBFor frequency-region signal example into Description is gone.In other implementations, communication equipment 410 can obtain the first and second signals of time domain, and can also be corresponding Ground determines the first and second transmission signals by estimating and removing interference.
In the above description, discuss transmitting communication equipment 410 to two receiving devices 420 and 430 simultaneously emit two Signal SAAnd SBThe case where.In other implementations, communication equipment 410 can also emit the signal of three or more, and this simultaneously A little signals may be transmitted on the subcarrier with different frequency intervals.It is adjacent two-by-two between these subcarriers.This In situation, for signal specific (such as the first signal SA), if being used for transmission the first signal SAThe first subcarrier not only with Binary signal SBThe second subcarrier it is adjacent, but also be used for transmission third signal SCThird subcarrier it is adjacent, communication equipment 410 can also correspondingly calculate at the same time transmitting in will be by third signal SCIt is caused to the first signal SAThird interference.In addition to From the first signal SAMiddle removal second signal SBExcept the second interference brought, the encoder 412 of communication equipment 410 is also from first Signal SAMiddle removal third signal SCThe third interference brought, to generate the first transmission signal.
Third signal can be transferred to other communication equipment, or can as communication equipment 410 or 420 other Business datum and be transmitted.Correspondingly, in order to transmit third signal, the encoder 412 of communication equipment 410 can also be calculated same When transmitting in will be by the first signal SAIt is caused to third signal SCThe 4th interference, and from three signal SCMiddle removal the 4th is dry It disturbs to generate third transmission signal TC.Above-mentioned similar mode can also be used for the calculating of the third and fourth interference.One In a little realizations, communication equipment 410 may include that other separately encoded device is used for third signal SCCoding.Third transmits signal Multiplexer 416 is provided to for multiplexing with together with the first and second transmission signals.Third transmission signal can be multiplexed to phase With on the third subcarrier of transmission time.Signal through multiplexing is provided to transceiver 418 with same in corresponding transmission time When emit.
Signal through multiplexing can be transferred to communication equipment 420 and 430 via channel 402.Channel 402 can be that communication is set Wireless connection and/or wired connection between standby.With continued reference to Fig. 4, in receiving side, communication equipment 420 is via channel 402 from logical Believe that equipment 410 receives signal.Communication equipment 420 includes transceiver 422, converter 424 and controller 426.Transceiver 422 is used for In the first received over subcarriers signal with first frequency interval.The signal received may be time-domain signal.Therefore, it communicates The converter 424 of equipment 420 can execute transformation of the time domain to frequency domain, obtain first and receive signal.
Because of the reason of frequency division multiplexing, although that the transmitting of communication equipment 410 is transmission signal TA, but due to being passed simultaneously The interference I of defeated signalBIntroducing, the reception signal that communication equipment 420 actually obtains be TA+IB(do not considering other interference In the case of).That is, it includes by second signal S to receive signalBCaused interference IBAnd believed from first by transmitting equipment Number remove interference IBAnd the transmission signal T generatedA.In the case where not considering other interference, the controller 426 of communication equipment 420 Removal be may not need by second signal SBCaused interference, and be that the first signal (it is expected by the directly processing of the first reception signal Signal).
In some cases, for from communication equipment 410 to the channel 402 of the transmission of communication equipment 420, there may be make an uproar Acoustic jamming.Such noise jamming for example can be by additive white noise N (0, σ2) modeling.Therefore, become alternatively by converter 424 Signal afterwards can be TA+IB+σ2.Therefore, controller 426 can also further execute the elimination of the noise jamming to channel 402 Deng processing, to obtain the first signal TA+IB.Certainly, controller 426 can also execute other processing, this public affairs to the first reception signal The realization opened is not limited in this respect.
Similarly, communication equipment 430 can also include transceiver 432, converter 434 and controller 436.Transceiver 432 For receiving signal from communication equipment 410 on the second subcarrier with second frequency interval.Converter 434 is used for receiving The time-domain signal arrived executes transformation of the time domain to frequency domain, obtains second and receives signal.Since the first signal being transmitted simultaneously draws The interference entered, second, which receives signal, includes interference IAWith transmission signal TB.In the case where not considering other interference, controller 436 It is second signal (i.e. desired signal) that can directly signal processing be received by second.In other implementations, controller 436 may be used also Further processing, such as the noise jamming elimination etc. of channel are executed to receive signal to second.
In the example of fig. 4, the first and second signals are transmitted to different communication equipments.It will be appreciated, however, that another In outer realization, the first and second signals can be launched as the different business data of same equipment.In such realization In, communication equipment 410 or 420 in Fig. 4 can be as the different receiving portions of same equipment, for receiving corresponding signal.
Although it should be appreciated that being described above with respect to the structure of transmitting terminal and the communication equipment of receiving terminal, communicate Equipment can also include the structure of other function modules and/or other configurations.In some implementations, it is described above as by two The operation that a or more function module executes can be executed by individual feature module.In other implementations, be described above as by The operation that individual feature module executes can also be realized by multiple function modules.The scope of the present disclosure is unrestricted in this regard System.
Fig. 6 shows the flow chart of the process 600 of some communications based on frequency division multiplexing realized according to the disclosure.It can To understand, process 600 can be for example in the equipment of communication equipment 410 or transmitting signal as shown in Figure 1 as shown in Figure 4 Implement at 110 or 120.For convenience of description, process 600 is illustrated with reference to Fig. 4.610, communication equipment 410 determines It is expected in emitting while the first signal and the second signal at the receiving terminal of second signal first caused by the first signal Interference and it is expected that the second interference caused by second signal at the receiving terminal of the first signal.First signal will be with the first frequency It is transmitted on first subcarrier at rate interval, and second signal will be passed on the second subcarrier with second frequency interval It is defeated.Second subcarrier is adjacent with the first subcarrier, and second frequency interval is different from first frequency interval.620, communication is set Standby 410 generate the first transmission signal by removing the second interference from the first signal.630, communication equipment 410 is by from The first interference is removed in binary signal to generate the second transmission signal.640, first transmission signal of the multiplexing of communication equipment 410 and the Two transmit signals for emitting simultaneously.
In some implementations, determine the first interference and second interference can include determining that the first signal for second The time-frequency conversion parameter of signal executes signal when converting other than the frequency band of the first subcarrier to be interfered as first, and really It is scheduled on when executing transformation to second signal for the time-frequency conversion parameter of the first signal other than the frequency band of the second subcarrier Signal as second to interfere.
In some implementations, time domain to frequency-domain transform may include Fast Fourier Transform (FFT), and wherein time-frequency conversion join Number includes Fourier transformation points.
In some implementations, the first transmission signal is generated to may further include：Third signal is obtained, third signal will be It is transmitted on the third subcarrier with third frequency interval in frequency domain, third subcarrier is adjacent with the first subcarrier and third Frequency interval is different from first frequency interval；It determines and will be believed by third in emitting while third subcarrier and the first subcarrier The third of the first signal is interfered caused by number；And generate first by further removing third interference from the first signal Transmit signal.
In some implementations, multiplexing may further include：Determine in the transmission the first signal to third signal the 4th Interference；By removing the 4th interference from third signal signal is transmitted to generate third；And third is further transmitted into signal Signal multiplexing is transmitted with the first transmission signal and second for emitting simultaneously.
In some implementations, second frequency interval can be first frequency interval two multiple or first frequency between Every two multiple that can be second frequency interval.
Fig. 7 shows the flow chart of the process 700 of some communications based on frequency division multiplexing realized according to the disclosure.It can To understand, process 700 can be for example in communication equipment 420 or 430 as shown in Figure 4, or as shown in Figure 1 reception signal Implement at equipment 110 or 120.For convenience of description, process 700 is illustrated with reference to the communication equipment of Fig. 4 420.It should Understand, communication equipment 430 can similarly execute operation.710, communication equipment 420 is in first with first frequency interval Received over subcarriers first receives signal.First reception signal is associated with the first signal for emitting equipment transmission, the first signal It is transmitted simultaneously with the second signal on the second subcarrier with second frequency interval.Second subcarrier and the first subcarrier It is adjacent, and second frequency interval is different from first frequency interval.First reception signal includes to have been done caused by second signal It disturbs and removes interference from the first signal by transmitting equipment and the transmission signal of generation.720, communication equipment 420 is not removing Processing first receives signal to obtain the first signal in the case of interference.
In some implementations, second frequency interval is two multiple at first frequency interval or first frequency interval is Two multiple at second frequency interval.
Fig. 8 shows the block diagram of some devices 800 realized according to the disclosure.It is appreciated that device 800 can be implemented At the equipment 110 or 120 of 410 side of communication equipment shown in Fig. 4 or transmitting signal shown in Fig. 1.As shown in figure 8, dress It includes determination unit 810 to set 800, is expected in second signal in transmitting while the first signal and the second signal for determining At receiving terminal the first interference caused by the first signal and it is expected that the first signal receiving terminal the caused by second signal Two interference.First signal will be transmitted on the first subcarrier with first frequency interval, and second signal will with It is transmitted on second subcarrier at second frequency interval.Second subcarrier is adjacent with the first subcarrier, and second frequency interval Different from first frequency interval.Device 800 further includes the first generation unit 820, for by removing second from the first signal It interferes to generate the first transmission signal.Device 800 further includes the second generation unit 830, for by being removed from second signal First interferes to generate the second transmission signal.In addition, device 800 further includes Multiplexing Unit 840, for being multiplexed the first transmission signal Signal is transmitted with second for emitting simultaneously.
In some implementations, determination unit 810 can be used for：It determines in the time-frequency to the first signal for second signal Signal when transformation parameter executes transformation other than the frequency band of the first subcarrier as first to interfere；And it determines to second When signal executes transformation for the time-frequency conversion parameter of the first signal signal other than the frequency band of the second subcarrier using as Second interference.
In some implementations, time domain to frequency-domain transform may include Fast Fourier Transform (FFT), and wherein time-frequency conversion join Number includes Fourier transformation points.
In some implementations, device 800 may further include：Acquiring unit, for obtaining third signal, third signal Will in a frequency domain with third frequency interval third subcarrier on be transmitted, third subcarrier it is adjacent with the first subcarrier and Third frequency interval is different from first frequency interval.Determination unit 810 is determined for carrying in third subcarrier and the first son The third of the first signal will be interfered caused by third signal in emitting while wave.First generation unit 820 can be used for The first transmission signal is generated by further removing third interference from the first signal.
In some implementations, determination unit 810 can be further used for：Determine that the first signal is to third signal in the transmission The 4th interference.Device 800 may further include third generation unit, for by removing the 4th interference from third signal Signal is transmitted to generate third.Multiplexing Unit 840 can be further used for third transmission signal transmitting signal and the with first Two transmit signal multiplexings for emitting simultaneously.
In some implementations, second frequency interval is two multiple at first frequency interval or first frequency interval is Two multiple at second frequency interval.
Fig. 9 shows the block diagram of some devices 900 realized according to the disclosure.It is appreciated that device 900 can be implemented At the equipment 110 or 120 of 420 or 430 side of communication equipment shown in Fig. 4 or reception signal shown in Fig. 1.Such as Fig. 9 institutes Show, device 900 includes receiving unit 910, for receiving letter in the first received over subcarriers first with first frequency interval Number.First, first signal and with second frequency interval associated with the first signal for emitting equipment transmission that receive signal Second signal on second subcarrier is transmitted simultaneously.Second subcarrier is adjacent with the first subcarrier, and second frequency interval Different from first frequency interval.First receive signal include the interference caused by second signal and by transmitting equipment from first Signal removes interference and the transmission signal of generation.Device 900 further includes processing unit 920, for the case where not removing interference Lower processing first receives signal to obtain the first signal.
In some implementations, second frequency interval is two multiple at first frequency interval or first frequency interval is Two multiple at second frequency interval.
It should be appreciated that device 800 and each unit described in device 900 respectively with the process that is described with reference to figure 6 to Fig. 7 Each step in 600 and 700 is corresponding.Moreover, being equally applicable to 800 above in association with Fig. 4 to Fig. 5 operations described and feature It with device 900 and unit wherein included, and has same effect, detail repeats no more.
800 and device 900 in included unit can profit realize in various manners, including software, hardware, firmware or It is arbitrarily combined.In one implementation, one or more units can be realized using software and/or firmware, such as be stored in Computer executable instructions on storage medium.Other than computer executable instructions or alternatively, 800 and device Some or all of unit in 900 can be realized by one or more hardware logic components at least partly.As example And it is unrestricted, the hardware logic component of the exemplary type that can be used includes field programmable gate array (FPGA), special integrated Circuit (ASIC), application specific standard product (ASSP), system on chip (SOC), Complex Programmable Logic Devices (CPLD), etc..
These units shown in Fig. 8 and Fig. 9 can partially or entirely be embodied as hardware module, software module, consolidate Part module or its arbitrary combination.Particularly, in some implementations, above-described flow, method or process can be by communicating Hardware in equipment is realized.For example, communication equipment can utilize its transmitter, receiver, transceiver and/or processor or control Device processed realizes process 600 and 700.
Figure 10 shows the simplified block diagram of the equipment 1000 for the realization for being suitable for realizing the disclosure.Equipment 1000 can be used for real Existing communication equipment, such as the network equipment shown in FIG. 1 110, terminal device 120 or communication equipment shown in Fig. 4 410,420 Or 430.As shown, equipment 1000 includes one or more processors 1010, is coupled to the one of (multiple) processor 1010 A or multiple memories 1020 are coupled to the one or more transmitters and/or receiver (TX/RX) 1040 of processor 1010.
Processor 1010 can have any types for being suitable for local technical environment, and can as non-limiting example To include following one or more：It all-purpose computer, special purpose computer, microprocessor, digital signal processor (DSP) and is based on The processor of multi-core processor framework.Equipment 1000 can have multiple processors, such as follow in time and primary processor Synchronous clock carries out driven dedicated IC chip.
Memory 1020 can have any types for being suitable for local technical environment and can use any suitable Data storage technology is implemented, as non-limiting example, such as non-transient computer readable storage medium, based on semiconductor Storage device, magnetic storage device and system, optical memory devices and system, fixed memory and removable memory.
Memory 1020 stores at least part of program 1030.TX/RX 1040 is used for two-way communication.TX/RX 1040 With at least one antenna, for promoting communication.Communication interface can indicate to communicate necessary any interface with other equipment.
It is assumed that program 1030 includes program instruction, these program instructions make when being executed by associated processor 1010 Equipment 1000 executes the realization such as the disclosure discussed above by reference to Fig. 4 to Fig. 7.That is, the realization of the disclosure can be with It is realized to realize, or by the combination of software and hardware by the executable computer software of the processor 1010 of equipment 1000.
In general, the various example implementations of the disclosure can be in hardware or special circuit, software, logic or its is any Implement in combination.Some aspects can be implemented within hardware, and other aspect can by controller, microprocessor or its Implement in the firmware or software that his computing device executes.For example, in some implementations, the various examples of the disclosure (such as method, Device or equipment) it some or all of can be implemented on a computer-readable medium.When the various aspects quilt of the realization of the disclosure Block diagram, flow chart are illustrated or described as or when using other certain graphical representations, it will be understood that box described herein, device, being System, techniques or methods can be used as unrestricted example hardware, software, firmware, special circuit or logic, common hardware or Implement in controller or other computing devices or its certain combination.
As an example, the realization of the disclosure can be described in the context of computer executable instructions, computer can Execute instruction such as includes in the program module that is executed in device on the physically or a virtually processor of target.It is general and Speech, program module include routine, program, library, object, class, component, data structure etc., execute specific task or realization Specific abstract data structure.In each realization, the function of program module can merge between described program module or Person is divided.Computer executable instructions for program module can execute in local or distributed apparatus.In distribution In equipment, program module can be located locally in remote medium storage the two.
The computer program code of method used to implement the present disclosure can be write with one or more programming languages.These Computer program code can be supplied to the processing of all-purpose computer, special purpose computer or other programmable data processing units Device so that program code by computer or other programmable data processing units execution when, cause flow chart and/ Or function/operation specified in block diagram is carried out.Program code can completely on computers, part on computers, conduct Independent software package, part are on computers and part is held on a remote computer or server on the remote computer or completely Row.
In the context of the disclosure, computer-readable medium can be include or storage be used for or about instruction execution Any tangible medium of the program of system, device or equipment.Computer-readable medium can be machine-readable signal medium or machine Device readable storage medium storing program for executing.Computer-readable medium can include but is not limited to electronics, magnetic, it is optical, electromagnetism, infrared Or semiconductor system, device or equipment or its any appropriate combination.The more detailed example of machine readable storage medium includes band There are electrical connection, portable computer diskette, hard disk, random access memories (RAM), the read-only storage of one or more conducting wire Device (ROM), Erasable Programmable Read Only Memory EPROM (EPROM or flash memory), light storage device, magnetic storage apparatus or its arbitrary conjunction Suitable combination.
In addition, although operation is depicted with particular order, this simultaneously should not be construed and require this generic operation to show Particular order is completed with sequential order, or executes the operation of all diagrams to obtain expected result.In some cases, more Task or parallel processing can be beneficial.Similarly, although discussed above contain certain specific implementation details, this is not It should be interpreted that any invention of limitation or the scope of the claims, and should be interpreted that specific implementation to specific invention can be directed to Description.Certain features in this specification described in the context of separated realization can also combined implementation individually realizing In.Conversely, the various features described in the context individually realized can also be discretely in multiple realizations or any appropriate Sub-portfolio in implement.
Although with specific to the language description of structural features and or methods of action theme, but it is to be understood that institute The theme limited in attached claim is not limited to above-described special characteristic or action.On the contrary, above-described specific spy Action of seeking peace is disclosed as the exemplary forms for realizing claim.

Claims (18)

1. a kind of method implemented at communication equipment, including：
Determine in emitting while the first signal and the second signal it is estimated at the receiving terminal of the second signal by described the First interference caused by one signal and it is expected that second dry caused by the second signal at the receiving terminal of first signal Disturb, first signal will be transmitted on the first subcarrier with first frequency interval, the second signal will with It is transmitted on second subcarrier at second frequency interval, second subcarrier and first subcarrier are adjacent and described Second frequency interval is different from the first frequency interval；
The first transmission signal is generated by removing second interference from first signal；
The second transmission signal is generated by removing first interference from the second signal；And
The first transmission signal and the second transmission signal are multiplexed for described while emitting.
2. according to the method described in claim 1, wherein determining that first interference and second interference include：
It determines when executing transformation to first signal for the time-frequency conversion parameter of the second signal described first Signal other than the frequency band of subcarrier as described first to interfere；And
It determines when executing transformation to the second signal for the time-frequency conversion parameter of first signal described second Signal other than the frequency band of subcarrier as described second to interfere.
3. according to the method described in claim 2, the wherein described time domain to frequency-domain transform include Fast Fourier Transform (FFT), and its Described in time-frequency conversion parameter include Fourier transformation points.
4. further comprising according to the method described in claim 1, wherein generating the first transmission signal：
Third signal is obtained, the third signal will be transmitted on the third subcarrier in a frequency domain with third frequency interval, The third subcarrier is adjacent with first subcarrier and the third frequency interval is different from the first frequency interval；
It determines and will be caused by the third signal in emitting simultaneously described in the third subcarrier and first subcarrier The third of first signal is interfered；And
The first transmission signal is generated by further removing the third interference from first signal.
5. according to the method described in claim 4, wherein described be multiplexed into a step and include：
Determine fourth interference of the first signal described in the transmission to the third signal；
By removing the 4th interference from the third signal signal is transmitted to generate third；And
Third transmission signal and the first transmission signal and described second are further transmitted into signal multiplexing for described Emit simultaneously.
6. according to the method described in claim 1, the wherein described second frequency interval is times of the two of the first frequency interval Number or the first frequency interval are two multiples at the second frequency interval.
7. a kind of method implemented at communication equipment, including：
Signal is received in the first received over subcarriers first with first frequency interval, the first reception signal is set with transmitting First signal of standby transmission is associated, first signal and the second letter on the second subcarrier with second frequency interval It number is transmitted simultaneously, second subcarrier is adjacent with first subcarrier, and the second frequency interval is different from described the One frequency interval, and the first reception signal includes the interference caused by the second signal and is set by the transmitting The standby transmission signal for removing the interference from first signal and generating；And
Described first is handled in the case where not removing the interference receives signal to obtain first signal.
8. according to the method described in claim 7, the wherein described second frequency interval is times of the two of the first frequency interval Number or the first frequency interval are two multiples at the second frequency interval.
9. a kind of communication equipment, including：
Processor；And
The memory coupled with the processor, the memory, which has, is stored in instruction therein, and described instruction is being handled Device makes the transmitting equipment execute action when executing, and the action includes：
Determine in emitting while the first signal and the second signal it is estimated at the receiving terminal of the second signal by described the First interference caused by one signal and it is expected that second dry caused by the second signal at the receiving terminal of first signal Disturb, first signal will be transmitted on the first subcarrier with first frequency interval, the second signal will with It is transmitted on second subcarrier at second frequency interval, second subcarrier and first subcarrier are adjacent and described Second frequency interval is different from the first frequency interval；
The first transmission signal is generated by removing second interference from first signal；
The second transmission signal is generated by removing first interference from the second signal；And
The first transmission signal and the second transmission signal are multiplexed for described while emitting.
10. communication equipment according to claim 9, wherein determining that first interference and second interference include：
It determines when executing transformation to first signal for the time-frequency conversion parameter of the second signal described first Signal other than the frequency band of subcarrier as described first to interfere；And
It determines when executing transformation to the second signal for the time-frequency conversion parameter of first signal described second Signal other than the frequency band of subcarrier as described second to interfere.
11. communication equipment according to claim 10, wherein the time domain to frequency-domain transform include Fast Fourier Transform (FFT), And the wherein described time-frequency conversion parameter includes Fourier transformation points.
12. communication equipment according to claim 9 further comprises wherein generating the first transmission signal：
Third signal is obtained, the third signal will be transmitted on the third subcarrier in a frequency domain with third frequency interval, The third subcarrier is adjacent with first subcarrier and the third frequency interval is different from the first frequency interval；
It determines and will be caused by the third signal in emitting simultaneously described in the third subcarrier and first subcarrier The third of first signal is interfered；And
The first transmission signal is generated by further removing the third interference from first signal.
13. communication equipment according to claim 12, it is multiplexed into a step wherein described and includes：
Determine fourth interference of the first signal described in the transmission to the third signal；
By removing the 4th interference from the third signal signal is transmitted to generate third；And
Third transmission signal and the first transmission signal and described second are further transmitted into signal multiplexing for described Emit simultaneously.
14. communication equipment according to claim 9, wherein the second frequency interval is the two of the first frequency interval Multiple or the first frequency interval be the second frequency interval two multiple.
15. a kind of communication equipment, including：
Processor；And
The memory coupled with the processor, the memory, which has, is stored in instruction therein, and described instruction is being handled Device makes the transmitting equipment execute action when executing, and the action includes：
Signal is received in the first received over subcarriers first with first frequency interval, the first reception signal is set with transmitting First signal of standby transmission is associated, first signal and the second letter on the second subcarrier with second frequency interval It number is transmitted simultaneously, second subcarrier is adjacent with first subcarrier, and the second frequency interval is different from described the One frequency interval, and the first reception signal includes the interference caused by the second signal and is set by the transmitting The standby transmission signal for removing the interference from first signal and generating；And
Described first is handled in the case where not removing the interference receives signal to obtain first signal.
16. communication equipment according to claim 15, wherein the second frequency interval is the first frequency interval Two multiple or the first frequency interval are two multiples at the second frequency interval.
17. a kind of computer-readable medium, be stored thereon with computer executable instructions, the computer executable instructions by One or more processors make one or more of processors execute according to described in any one of claim 1 to 6 when executing Method the step of.
18. a kind of computer-readable medium, be stored thereon with computer executable instructions, the computer executable instructions by One or more processors make one or more of processors execute according to described in any one of claim 7 and 8 when executing Method the step of.
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