WO2023109856A1 - Émetteur-récepteur de communication, procédé d'émission-réception de signal, dispositif électronique et support de stockage - Google Patents

Émetteur-récepteur de communication, procédé d'émission-réception de signal, dispositif électronique et support de stockage Download PDF

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WO2023109856A1
WO2023109856A1 PCT/CN2022/138953 CN2022138953W WO2023109856A1 WO 2023109856 A1 WO2023109856 A1 WO 2023109856A1 CN 2022138953 W CN2022138953 W CN 2022138953W WO 2023109856 A1 WO2023109856 A1 WO 2023109856A1
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signal
cancellation
downlink
output
link
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PCT/CN2022/138953
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English (en)
Chinese (zh)
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王大鹏
宁东方
段亚娟
张青青
张作锋
许勇
黄�俊
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the technical field of mobile communication.
  • wireless transceivers have used half-duplex modes for information exchange, either Time Division Duplex (TDD) or Frequency Division Duplex (FDD).
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • the transceiver cannot transmit and receive signals in the same frequency band in the same time slot.
  • This communication mode restricts the efficiency of spectrum utilization.
  • full-duplex communication has received more attention.
  • Full-duplex communication technology allows nodes to send and receive signals at the same frequency at the same time, significantly improving the utilization efficiency of spectrum and time slot resources.
  • Full-duplex communication has the following advantages: first, its data throughput can be approximately twice that of half-duplex mode; second, it can significantly reduce end-to-end delay; third, it can avoid channel conflicts and solve hidden terminals, etc. question.
  • the main purpose of the embodiments of the present disclosure is to provide a communication transceiver, a signal transceiving method, an electronic device, and a storage medium.
  • an embodiment of the present disclosure provides a communication transceiver, including: at least one transmitting link, at least one observation branch, at least one receiving link, at least one auxiliary branch, at least one first cancellation module, At least one second cancellation module, and an antenna, wherein the number of the at least one transmission chain is the same as the number of the at least one observation branch, and the number of the at least one reception chain, the at least one auxiliary branch
  • the number of the way, the number of the at least one first cancellation module and the number of the at least one second cancellation module are the same as each other, and the output end of each of the at least one transmission chain and the at least one observation branch are the same as the The input end and antenna connection of the observation branch corresponding to the transmission chain, each of at least one transmission chain is configured to generate and output a downlink signal according to the downlink baseband signal, and the output of all observation branches in at least one observation branch
  • Each terminal is connected to the input end of each of the at least one second cancellation module, and each of the at least one observation branch is
  • an embodiment of the present disclosure further provides a signal transceiving method, including: generating and sending a downlink signal according to the downlink baseband signal; generating a first cancellation signal according to the downlink baseband signal, and generating a second cancellation signal according to a noise signal of the downlink baseband signal.
  • the second cancellation signal according to the first cancellation signal and the second cancellation signal, two-stage interference cancellation is performed on the uplink baseband signal received in the process of sending the downlink signal; the uplink baseband signal after the two-stage interference cancellation is analyzed to obtain the uplink signal.
  • an embodiment of the present disclosure further provides an electronic device, including: at least one processor; and a memory connected to the at least one processor in communication; wherein, the memory stores instructions that can be executed by the at least one processor , when the instructions are executed by at least one processor, at least one processor is made to execute the signal transceiving method as described above.
  • an embodiment of the present disclosure further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the above-mentioned method for transmitting and receiving signals is implemented.
  • the auxiliary branch is used to obtain the baseband copy of the radio frequency cancellation signal in the digital domain, and the first cancellation signal (radio frequency cancellation signal) is generated through signal processing;
  • the observation branch is used according to The downlink baseband signal and the downlink signal of the transmission link are obtained in the digital domain to cancel the second cancellation signal (noise cancellation signal) that cancels the noise component of the downlink baseband signal to the self-interference of the uplink signal; then the first cancellation signal and the received uplink baseband signal After combining, the first combined signal is adjusted through the receiving link to generate a second combined signal, and then the second cancellation signal is combined with the second combined signal to generate a third combined signal for analyzing the uplink signal.
  • the adaptive capability of the communication transceiver is improved; by canceling the two-level cancellation signals that the downlink baseband signal has on the radio frequency and noise effects of the uplink signal, two-level self-interference cancellation is performed on the uplink baseband signal , which greatly improves the self-interference cancellation performance of the communication transceiver;
  • the auxiliary branch and the observation branch are only used for offset signal generation, not for offset coordination, so as to improve the stability of communication transceiver self-interference cancellation.
  • FIG. 1 is a schematic structural diagram of a communication transceiver according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a communication transceiver according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a communication transceiver according to an embodiment of the present disclosure
  • FIG. 4 is a flowchart of a signal transceiving method according to an embodiment of the present disclosure
  • Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
  • the main problem faced is self-interference phenomenon.
  • the duplex bandwidth of the full-duplex communication transceiver is smaller, and the transmission and reception do not distinguish between time slots.
  • Part of the energy of the transmitted signal will enter the receiving link through leakage, coupling, multipath reflection, etc., causing interference to the received user signal .
  • This part of the energy that enters the receiving chain and originates from the transmitting chain is called self-interference signal.
  • the downlink transmit signal power will be about 110dB higher than the uplink receive signal power.
  • the transceiver isolation of the full-duplex communication needs to meet the specific isolation requirement according to the scenario.
  • the desired isolation requirements are achieved jointly in the propagation, radio frequency and digital domains.
  • Isolation techniques in the propagation domain include physical separation of antennas, polarized antennas, circulators and other isolation or self-interference cancellation methods.
  • the self-interference cancellation technology in the radio frequency domain mainly adopts the multi-tap radio frequency canceller scheme, and reconstructs the anti-phase self-interference signal through the n-order FIR filter.
  • Each stage of the FIR filter is composed of a fixed delay line, an adjustable attenuator and an adjustable Phase device composition.
  • the self-interference cancellation in the digital domain mainly uses the transmitted baseband signal as a reference signal, and realizes self-interference channel modeling through an adaptive filter.
  • the performance gain is low, the adaptive ability to the time-varying interference channel is poor, and the system stability is easily affected.
  • the digital domain self-interference cancellation scheme is adopted, in the case of strong interference, the digital quantization noise is relatively large, and the self-interference cancellation effect is poor.
  • an embodiment of the present disclosure provides a communication transceiver, including: at least one transmission link, at least one observation branch, at least one reception link, at least one auxiliary branch, and at least one first cancellation module , at least one second canceling module, and an antenna; wherein, the output end of each transmission chain is connected to the input end of the observation branch corresponding to the transmission chain and the antenna, and each transmission chain is used to generate And output the downlink signal; the output ends of all observation branches are connected to the input end of each second offset module, and each observation branch is used to generate and output the second offset signal according to the downlink baseband signal and the downlink signal; each first The other input terminal of the second canceling module is connected to the output terminal of the receiving link corresponding to the second canceling module, and each second canceling module is used to generate and output the obtained second combination signal and the second canceling signal
  • the communication transceiver uses the auxiliary branch to obtain the baseband copy of the radio frequency cancellation signal in the digital domain during operation, and generates the first cancellation signal (radio frequency cancellation signal) through signal processing; uses the observation branch According to the downlink baseband signal and the downlink signal of the transmission link, the second cancellation signal (noise cancellation signal) that cancels the noise component of the downlink baseband signal to the self-interference of the uplink signal is obtained in the digital domain; then the first cancellation signal and the received uplink baseband After the signals are combined, the first combined signal is adjusted through the receiving link to generate the second combined signal, and then the second cancellation signal is combined with the second combined signal to generate the third combined signal for analyzing the uplink signal. combined signal.
  • the adaptive capability of the communication transceiver is improved; by canceling the two-level cancellation signals that the downlink baseband signal has on the radio frequency and noise effects of the uplink signal, two-level self-interference cancellation is performed on the uplink baseband signal , which greatly improves the self-interference cancellation performance of the communication transceiver; the auxiliary branch and the observation branch are only used for cancellation signal generation, not for cancellation coordination, and improve the stability of the self-interference cancellation of the communication transceiver.
  • the present disclosure provides a communication transceiver, in which the transmitting link and the receiving link can be one or more.
  • the present disclosure is described as including a transmission link and a reception link in a communication transceiver.
  • Fig. 1 is a schematic structural diagram of a communication transceiver according to an embodiment of the present disclosure.
  • the communication transceiver includes a transmission link 101 , an observation branch 102 , a second cancellation module 103 , a reception link 104 , a first cancellation module 105 , an auxiliary branch 106 and an antenna 107 .
  • the transmit link 101 is used to generate and output a downlink signal according to a downlink baseband signal.
  • the transmit link 101 in the communication transceiver is used to perform signal processing on the downlink baseband signal to generate a downlink signal, for example, perform digital-to-analog conversion, up-conversion, filtering, gain adjustment, and power amplification on the downlink baseband signal, and then obtain downlink signal output. Therefore, the output end of the transmitting link 101 is connected to the input end of the observation branch 102 and the antenna 107, and the transmitting link 101 is used to generate and output a downlink signal according to the received downlink baseband signal.
  • the observation branch 102 is configured to generate and output a second cancellation signal according to the downlink baseband signal and the downlink signal.
  • the observation branch 102 is used to obtain a second cancellation signal (noise cancellation signal) that cancels the noise interference caused by the noise component of the downlink baseband signal to the uplink signal in the digital domain, and transmits the obtained second cancellation signal to the second cancellation module 103 in. Therefore, the output end of the observation branch 102 is connected to the input end of the second cancellation module 103, and the observation branch 102 is used to generate and output the second cancellation signal according to the acquired downlink baseband signal and the downlink signal generated based on the downlink baseband signal .
  • a second cancellation signal noise cancellation signal
  • the second canceling module 103 is configured to generate and output a third combined signal for parsing the uplink signal.
  • the second canceling module 103 is configured to combine the second combined signal output by the receiving link 104 and the second canceled signal output by the observation branch 102, so as to cancel noise interference in the second combined signal. Therefore, the other input terminal of the second canceling module 103 is connected to the output terminal of the receiving link 104. After receiving the second combination signal output by the receiving link 104 and the second canceling signal output by the observation branch 102, the first The second cancellation module 103 generates and outputs a third combined signal for analyzing the uplink signal according to the acquired second combined signal and the second canceled signal.
  • the receiving link 104 is used to generate and output the second combined signal.
  • the receiving chain 104 is used to perform signal processing and adjustment on the first combined signal formed by the first stage of self-interference cancellation, for example, low noise amplification, gain adjustment, down-conversion, analog-to-digital conversion, etc., to generate the second combined signal Signal. Therefore, the input terminal of the receiving link 104 is connected to the output terminal of the first canceling module 105, and after receiving the first combined signal output by the first canceling module 105, the receiving link 104 generates and outputs a second combined signal.
  • the first cancellation module 105 is used for generating and outputting a first combined signal.
  • the first canceling module 105 is configured to perform first-stage self-interference cancellation on the uplink baseband signal according to the received first canceling signal, so as to generate a first combined signal. Therefore, the input terminal of the first canceling module 105 is connected with the output terminal of the auxiliary branch 106 and the antenna 107. After receiving the first canceling signal output by the auxiliary branch 106 and the uplink baseband signal output by the antenna 107, the first canceling module 105 Combine the first cancellation signal and the acquired uplink baseband signal to generate and output a first combined signal.
  • the auxiliary branch 106 is used to generate and output the first cancellation signal.
  • the auxiliary branch 106 is used to extract the radio frequency interference component of the downlink baseband signal on the uplink signal, and obtain a first cancellation signal for canceling radio frequency self-interference caused by the downlink baseband signal. Therefore, the input end of the auxiliary branch 106 is connected to the output end of the receiving link 104 , and the auxiliary branch 106 generates a first cancellation signal according to the obtained downlink baseband signal and the second combined signal output by the receiving link 104 .
  • the antenna 107 is used for sending downlink signals and receiving uplink baseband signals.
  • the antenna 107 is used to send the downlink signal output by the transmission link 101 to the next node, receive the uplink baseband signal sent from other nodes, and transmit the received uplink baseband signal to the first canceling module 105 .
  • the transmit link 101 When the communication transceiver performs uplink signal reception and downlink signal transmission at the same frequency or close frequency at the same time, the transmit link 101 generates a downlink signal according to the downlink baseband signal and outputs the downlink signal to the antenna 107 for transmission, and the antenna 107 will transmit the downlink signal in the
  • the uplink baseband signal received in the downlink signal transmission process is transmitted to the first canceling module 105, and the first canceling module 105 uses the first canceling signal generated by the auxiliary branch 106 according to the downlink baseband signal and the second combined signal to correct the uplink baseband signal.
  • the signal is subjected to the first level of radio frequency self-interference cancellation, and then the first combined signal generated by the first level of self-interference cancellation is input to the receiving link 104, and the receiving link 104 performs signal processing and conversion on the first combined signal , generate the second combined signal, and output the second combined signal to the second canceling module 103 and the auxiliary branch 106, the second canceling module 103 uses the second signal generated by the observation branch 102 according to the downlink baseband signal and the downlink signal Canceling the signal, performing a second stage of noise self-interference cancellation on the second combined signal to generate a third combined signal for analyzing the uplink signal.
  • the generation and modulation of the downlink baseband signal can be completed by the downlink signal modulator in the communication transceiver, and the acquisition of the uplink signal can be completed by the uplink signal demodulator in the communication transceiver, or directly obtain the downlink signal externally.
  • the baseband signal and the uplink signal are analyzed and acquired, which is not limited in this embodiment.
  • the observation branch in the communication transceiver includes: a noise model filter, an observation link, and a power division module.
  • the input end of the power division module is connected to the output end of the transmission link corresponding to the observation branch, the output end of the power division module is connected to the input end of the observation link and the antenna, and the power division module is used for power distribution of the downlink signal.
  • the downlink signal after power allocation is transmitted to the observation link and the antenna; the output end of the observation link is connected to the input end of the noise model filter, and the observation link is used to generate and output the reference signal according to the received downlink signal after power allocation.
  • Downlink baseband signal; the output end of the noise model filter is connected to the second cancellation module, and the noise model filter is used to generate and output the second cancellation signal according to the downlink baseband signal and the reference downlink baseband signal.
  • the antennas are used to transmit downlink signals after power allocation.
  • the power division module in the observation branch is used to allocate power to the downlink signal output by the transmission link, allocate part of the power as the input of the observation link, and transmit the rest to the antenna for transmission. After performing gain adjustment, frequency down conversion, filtering, analog-to-digital conversion and other operations on the received downlink signal with partial power through the power distribution of the power division module and the observation link, the downlink signal after the adjusted power distribution is transmitted to the noise model filter.
  • the noise model filter extracts the noise component of the downlink signal sent by the antenna according to the received downlink signal after the adjusted power allocation and the downlink baseband signal, and generates a second cancellation signal for canceling noise self-interference.
  • the noise interference is accurately extracted through the noise model filter and a second cancellation signal is generated for the second cancellation module to accurately cancel the noise interference, thereby improving the self-interference cancellation performance of the communication transceiver.
  • the power dividing module, the first canceling module, and the second canceling module may all be power dividers, combiners or couplers, and this embodiment does not limit the specific selection.
  • the auxiliary branch in the communication transceiver includes: a channel model filter and an auxiliary link; the input end of the channel model filter is connected to the output end of the receiving link corresponding to the auxiliary branch, and the channel model filter The output end of the filter is connected to the input end of the auxiliary link, and the channel model filter is used to generate a digital baseband signal according to the downlink baseband signal and the second combined signal; the output end of the auxiliary link and the first offsetting module corresponding to the auxiliary branch The input terminal is connected, and the auxiliary link is used to generate and output the first cancellation signal according to the digital baseband signal.
  • the channel model filter in the auxiliary branch collects the second combined signal output by the receiving link, and performs radio frequency interference on the uplink signal from the downlink signal sent by the antenna according to the downlink baseband signal and the second combined signal. Extract and generate a digital baseband signal that cancels radio frequency interference, and then output the digital baseband signal to the auxiliary link.
  • the auxiliary link performs digital-to-analog conversion, up-conversion, and gain adjustment on the digital baseband signal, the first offset is generated and output Signal.
  • the digital baseband signal that cancels the radio frequency interference is accurately generated according to the second combined signal and the downlink baseband signal output by the receiving link, and the digital baseband signal is processed through the auxiliary link to obtain the first cancellation signal and the second.
  • a cancellation signal is sent to the first cancellation module, and the first cancellation module accurately cancels the radio frequency interference to improve the self-interference cancellation performance of the communication transceiver.
  • FIG. 2 a schematic structural diagram of a full-duplex communication transceiver is shown in FIG. 2 .
  • the workflow of the communication transceiver is as follows.
  • the downlink signal modulator outputs the downlink baseband signal x[n].
  • the transmission link band-pass signal s TX (t) is power distributed by the power division module, a part of the power is transmitted to the transmission antenna, and the other part of the power is transmitted to the observation link.
  • the signal transmitted to the transmit antenna is called transmit bandpass signal Its power is approximately equal to the transmit link band-pass signal s TX (t), and the transmit band-pass signal
  • the transmitting antenna is converted into electromagnetic waves for radiative transmission.
  • part of the power reaches the output end of the receiving antenna through the self-interference channel, forming a self-interference bandpass signal S TxL (t), where is the self-interference component of the transmitted bandpass signal, is the self-interference component of the transmitted bandpass noise.
  • the receiving antenna simultaneously receives the uplink bandpass signal u(t) and background noise v ANT (t), and the receiving bandpass signal y(t) appearing at the output of the receiving antenna can be expressed as:
  • the receive bandpass signal y(t) is composed of the self-interference bandpass signal S TxL (t), the uplink bandpass signal u(t) and the background noise v ANT (t).
  • the receiving bandpass signal y(t) output by the receiving antenna is transmitted to the first canceling module, the first input of the first canceling module is the receiving bandpass signal y(t), and the second input is the auxiliary link output by the auxiliary link Bandpass signal (1st cancellation signal) x AUX (t):
  • the first cancellation module combines the first cancellation signal output by the auxiliary link with the reception bandpass signal y(t) output by the receiving antenna to generate a first-stage cancellation residual bandpass signal after the first-stage self-interference cancellation (first combined signal) e 1 (t):
  • the first-stage cancellation residual band-pass signal e 1 (t) is transmitted to the receiving chain, and the receiving chain performs low-noise amplification, filter adjustment, down-conversion, and gain adjustment on the first-stage cancellation residual band-pass signal e 1 (t) , analog-to-digital conversion and other signal adjustments, output a first-level offset residual baseband signal (second combined signal) p[n]:
  • e 1 [n] is the first-order cancellation residual baseband signal
  • v RX [n] is the noise of the receiving chain
  • the digital baseband u[n], v ANT [n], v RX [n], and ⁇ 1 [n] are RF bandpass signals, respectively
  • the one-stage cancellation residual baseband signal p[n] is transmitted to the first channel model filter input terminal and the first input terminal of the second offsetting module.
  • the first input of the channel model filter is the first-stage cancellation residual baseband signal p[n]
  • the second input of the channel model filter is the downlink baseband signal x[n]
  • the output of the channel model filter is the first-stage self-interference cancellation Baseband signal (digital baseband signal)
  • Auxiliary link to first-stage self-interference cancellation baseband signal After performing digital-to-analog conversion, up-conversion, and gain adjustment, an auxiliary link band-pass signal (first cancellation signal) x AUX (t) is output.
  • observation link bandpass signal s OBS (t) Another part of the power of the transmission link bandpass signal s TX (t) is transmitted to the observation link, then the observation link bandpass signal s OBS (t) can be expressed as
  • ⁇ is the coupling coefficient
  • the bandpass signal of the observation link is adjusted by gain, frequency down-conversion, filtering, and analog-to-digital conversion to output the baseband signal of the observation link s OBS [n]:
  • ⁇ DIG is the digital gain proportional to ⁇
  • x PA [n] is the linear or nonlinear mapping of the downlink baseband signal x[n]
  • v TX [n] is the transmit link noise
  • v OBS [n] is the observed Total link noise.
  • the first input of the noise model filter is the downlink baseband signal x[n]
  • the second input of the noise model filter is the observed link baseband signal s OBS [n]
  • the output of the noise model filter is the transmit link noise estimate ( second offset signal)
  • ⁇ OBS [n] is the model error of the noise model filter.
  • the first input of the digital domain canceller is the first-stage cancellation residual baseband signal p[n], and the second input of the digital domain canceller is the transmit link noise estimate
  • the digital domain canceller uses transmit chain noise estimation Fitting a baseband replica of the self-interference component of the transmit bandpass noise
  • the second cancellation module generates and outputs the secondary cancellation residual baseband signal (third combined signal) e 2 [n]:
  • v total [n] v ANT [n] + v RX [n] is the total noise of the receiving link
  • ⁇ total [n] ⁇ 1 [n] + ⁇ 2 [n ] is the unmodeled total error introduced by the two-stage self-interference cancellation.
  • the unmodeled total error power introduced by the two-stage self-interference cancellation is less than the total noise of the receiving link, that is, E(
  • the two-stage The loss of receiving sensitivity introduced by interference cancellation is less than or equal to 3dB.
  • the introduction of the auxiliary branch and the observation branch's own noise can also be optimized and reduced by increasing the dynamic range of the digital-to-analog converter and the analog-to-digital converter, so as to achieve a better signal transmission effect.
  • the communication transceiver further includes: at least one transmission model filter, the output end of the transmission model filter is connected to the input end of the transmission link corresponding to the transmission model, and is used to perform nonlinear distortion on the downlink baseband signal Correction.
  • a transmission model filter can be added at the front end of each transmission link of the communication transceiver.
  • the transmission model filter is used to correct the downlink baseband input to the transmission link by establishing a nonlinear inverse model of the transmission link.
  • the nonlinear distortion of the signal improves the linearity of the transmitted signal and alleviates the nonlinear interference component introduced by the receiving link.
  • Fig. 3 is a schematic structural diagram of a communication transceiver according to an embodiment of the present disclosure.
  • the communication transceiver includes multiple transmission links, several observation branches with the same number as the transmission links, multiple reception links, several auxiliary branches with the same number as the reception links, and a first cancellation module and a second offset module.
  • connection mode between each module of the communication transceiver is roughly the same as when there is only one transmission link and reception link (that is, Figure 1), the difference is that the outputs of all observation branches are connected to each second offsetting module, and each A second canceling module performs secondary self-interference cancellation on the second composite signal output by the receiving chain corresponding to the second canceling module according to a plurality of second canceling signals respectively corresponding to all transmitting links to generate a third combined signal;
  • an auxiliary branch generates the first canceling signal
  • the first canceling signal is generated according to the multiple downlink baseband signals generated by each transmitting link and the second combined signal output by the receiving link corresponding to the auxiliary branch , and output to the first cancellation module corresponding to the auxiliary branch.
  • each auxiliary branch is used to generate and output a first cancellation signal according to the n downlink baseband signals and the second combination signal output by the receiving link corresponding to the auxiliary branch; each second cancellation module is used for Generate and output a third combined signal according to the n second canceling signals and the second combined signal output by the receiving link corresponding to the second canceling module.
  • the communication transceiver does not need to be increased too much in the MIMO scenario equipment, and the self-interference cancellation system has better stability and cancellation performance.
  • the communication transceiver when it performs the first-level self-interference cancellation on each uplink signal, it uses the first cancellation signal generated according to the m downlink baseband signals and the second composite signal in the current link Synthesize with the uplink baseband signal to generate the first combined signal; when performing the second-level self-interference cancellation, each second cancellation module calculates and outputs the corresponding transmission link noise estimate based on n observation branches, and completes The second-stage self-interference cancellation of the second combined signal output by the receiving link corresponding to itself generates a third combined signal.
  • the communication transceiver can transmit and receive uplink and downlink signals through an antenna, and the antenna can be formed by two antenna configurations: a separate transmitting and receiving antenna and a circulator transmitting and receiving common antenna.
  • self-interference includes the leakage of the whole machine, near-field radiation, multipath reflection, etc. This embodiment does not limit the selected antenna and the specific configuration of the antenna.
  • a transmission model filter module can also be set before each transmission link to further optimize the nonlinear distortion of the transmission link and avoid the introduction of nonlinear distortion interference.
  • the communication transceiver provided in the embodiments of the present disclosure may be a wireless transceiver, which may be used in any duplex communication transceiver node in a wireless communication network, and may also be used in a duplex wireless communication terminal. For example, communication between a base station and a terminal, communication between a base station and a base station, and the like.
  • the information exchange of the above-mentioned communication transceivers, more precisely, the signal transmission and reception can be carried out in the same time slot and the same frequency band.
  • the communication transceivers can be used in at least the following two working modes, which can flexibly meet the requirements of different time slots and frequency resource divisions.
  • FIG. 4 is a flowchart of a signal transceiving method according to an embodiment of the present disclosure.
  • the signal transceiving method is applied to a communication transceiver.
  • the signal transceiving method includes steps 401 to 404 .
  • step 401 a downlink signal is generated and sent according to the downlink baseband signal.
  • the transmission link in the communication transceiver performs digital-to-analog conversion, up-conversion, filtering, gain adjustment, and power amplification on the downlink baseband signal according to the received downlink baseband signal, so as to generate and output the downlink signal, and transmit the downlink signal through the antenna.
  • the signal is sent to the next node.
  • the communication transceiver before the communication transceiver generates and transmits the downlink signal according to the downlink baseband signal, it further includes: performing nonlinear distortion correction on the downlink baseband signal.
  • the step of generating and sending the downlink signal according to the downlink baseband signal includes: generating and sending the downlink signal according to the downlink baseband signal after nonlinear distortion correction.
  • a first cancellation signal is generated according to the downlink baseband signal
  • a second cancellation signal is generated according to a noise signal of the downlink baseband signal.
  • the communication transceiver generates a first cancellation signal for canceling radio frequency interference caused by the downlink signal to the uplink signal through the auxiliary branch according to the downlink baseband signal.
  • the communication transceiver generates a second cancellation signal for canceling noise interference caused by the noise signal of the downlink signal to the uplink signal through the observation branch according to the downlink baseband signal.
  • the communication transceiver generates the first cancellation signal according to the downlink baseband signal
  • the step of generating the second cancellation signal according to the noise signal of the downlink baseband signal includes: generating the first cancellation signal according to the downlink baseband signal and the uplink combined signal, wherein the uplink combined signal
  • the signal is generated according to the uplink baseband signal after interference cancellation by using the first cancellation signal
  • the second cancellation signal is generated according to the downlink baseband signal and the downlink signal after power allocation.
  • the communication transceiver generates the first cancellation signal through the auxiliary branch according to the downlink baseband signal and the uplink combined signal output by the receiving link corresponding to the auxiliary branch;
  • the downlink baseband signal of the link and the downlink signal after the power allocation are used to generate a second cancellation signal.
  • step 403 two-stage interference cancellation is performed on the uplink baseband signal received in the process of sending the downlink signal according to the first cancellation signal and the second cancellation signal.
  • the communication transceiver combines the acquired first cancellation signal with the uplink baseband signal received in the process of sending the downlink signal through the first cancellation module, cancels the radio frequency interference of the downlink signal to the uplink signal, and generates the first combined signal; Then perform low-noise amplification, gain adjustment, down-conversion, analog-to-digital conversion and other processing on the first combined signal to generate a second combined signal; Combine the signals of the two channels to cancel the noise interference of the noise signal of the downlink signal on the uplink signal, complete the two-stage interference cancellation, and generate the third combined signal.
  • step 404 the uplink baseband signal (that is, the third combined signal) after the two-stage interference cancellation is analyzed to obtain the uplink signal.
  • the uplink signal demodulator can analyze the third combined signal to obtain the uplink signal.
  • the signal transceiving method is a method embodiment corresponding to the above-mentioned communication transceiver, and the signal transceiving method can be implemented in cooperation with the above-mentioned communication transceiver.
  • the relevant technical details mentioned above in the communication transceiver are still valid in this embodiment, and will not be repeated here in order to reduce repetition.
  • the relevant technical details mentioned in this embodiment can also be applied in the device embodiment.
  • Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
  • the electronic device includes: at least one processor 501 ; and a memory 502 communicatively connected to the at least one processor 501 .
  • the memory 502 stores instructions executable by the at least one processor 501.
  • the at least one processor 501 can execute the signal transceiving method described in any method embodiment above.
  • the memory 502 and the processor 501 are connected by a bus.
  • the bus may include any number of interconnected buses and bridges.
  • the bus connects one or more processors 501 and various circuits of the memory 502 together.
  • the bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein.
  • the bus interface provides an interface between the bus and the transceivers.
  • a transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium.
  • the data processed by the processor 501 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the data and transmits the data to the processor 501 .
  • Processor 501 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management and other control functions. And the memory 502 may be used to store data used by the processor 501 when performing operations.
  • the present disclosure also provides a computer-readable storage medium storing a computer program.
  • the computer program is executed by the processor, the above signal transceiving method is realized.
  • the program is stored in a storage medium and includes several instructions to make a device (which can be a single-chip microcomputer, chips, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disc, etc., which can store program codes. .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Noise Elimination (AREA)
  • Transceivers (AREA)

Abstract

La présente divulgation concerne un émetteur-récepteur de communication, un procédé d'émission-réception de signal, un dispositif électronique, et un support de stockage. L'émetteur-récepteur de communication comprend au moins une liaison de transmission et au moins une branche d'observation comprenant le même numéro, au moins une liaison de réception, au moins une branche auxiliaire, au moins un premier module d'annulation et au moins un second module d'annulation comprenant le même numéro, et une antenne. Chaque liaison de transmission est utilisée pour générer et émettre un signal de liaison descendante selon un signal de bande de base de liaison descendante. Chaque branche d'observation est utilisée pour générer et émettre un second signal d'annulation. Chaque liaison de réception est utilisée pour générer et émettre un premier signal combiné. Chaque branche auxiliaire est utilisée pour générer et émettre un premier signal d'annulation. Chaque premier module d'annulation et chaque second module d'annulation sont respectivement utilisés pour réaliser une annulation d'interférence à deux étages sur le signal de bande de base de liaison montante selon le premier signal d'annulation et le second signal d'annulation.
PCT/CN2022/138953 2021-12-15 2022-12-14 Émetteur-récepteur de communication, procédé d'émission-réception de signal, dispositif électronique et support de stockage WO2023109856A1 (fr)

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