WO2017020604A1 - 一种收发共用天线的同时同频全双工终端及其通信方法 - Google Patents

一种收发共用天线的同时同频全双工终端及其通信方法 Download PDF

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Publication number
WO2017020604A1
WO2017020604A1 PCT/CN2016/078646 CN2016078646W WO2017020604A1 WO 2017020604 A1 WO2017020604 A1 WO 2017020604A1 CN 2016078646 W CN2016078646 W CN 2016078646W WO 2017020604 A1 WO2017020604 A1 WO 2017020604A1
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Prior art keywords
signal
transmitting
antenna
receiving
module
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Ceased
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PCT/CN2016/078646
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English (en)
French (fr)
Inventor
胡胜钢
郭爱平
赵士青
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Huizhou TCL Mobile Communication Co Ltd
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Huizhou TCL Mobile Communication Co Ltd
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Priority to US15/327,034 priority Critical patent/US20170214512A1/en
Publication of WO2017020604A1 publication Critical patent/WO2017020604A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
    • 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
    • H04B1/005—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—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 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • 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
    • H04B1/44—Transmit/receive switching
    • 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
    • H04B1/44—Transmit/receive switching
    • H04B1/48—Transmit/receive switching in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna and a communication method thereof.
  • CCFD Co-frequency Co-time Full
  • co-frequency simultaneous full-duplex Wireless communication devices use the same time, the same frequency, and simultaneously transmit and receive wireless signals, making the spectrum efficiency of wireless communication links doubled.
  • the existing 5G alternative technology of the same-frequency full-duplex terminal antenna adopts a multi-antenna scheme, and multiple antennas are used to achieve antenna interference cancellation and radio frequency interference cancellation.
  • the multi-antenna cost is high, and the terminal is required to have enough space and place the antennas as required, such as space placement to achieve antenna cancellation, etc., which brings many difficulties to the terminal design, which not only increases the cost, but also increases the terminal volume.
  • the transmission signal of the CCFD transmitter will cause interference to the local receiver.
  • the primary task of using CCFD is to suppress strong self-interference.
  • the self-interference cancellation capability will directly affect the communication quality of the CCFD system.
  • the invention proposes to transmit and receive the same-frequency full-duplex terminal sharing the same antenna, so that the simultaneous-frequency full-duplex transmission and reception solve the same-frequency self-interference cancellation problem in the case of sharing one antenna.
  • an object of the present invention is to provide a simultaneous-frequency full-duplex terminal and a communication method thereof for transmitting and receiving a shared antenna, so as to achieve a common transmission and reception of the same-frequency full-duplex terminal.
  • the antenna achieves the purpose of self-interference suppression elimination.
  • a simultaneous-frequency full-duplex terminal for transmitting and receiving a shared antenna, comprising a central processing unit and a radio frequency transmitting receiver, wherein the simultaneous co-frequency full-duplex terminal further comprises a transmitting module, a receiving module, an antenna module, and a combiner;
  • the antenna module includes an antenna; the first end of the combiner is connected to the transmitting module, the second end of the combiner is connected to the receiving module, and the third end of the combiner is connected to the antenna;
  • the transmitting data output by the central processing unit is modulated by the radio frequency transmitting receiver to obtain a radio frequency signal, and the transmitting module performs power amplification on the radio frequency signal, and then outputs a transmitting signal to the antenna of the antenna module to transmit;
  • the antenna module receives a base station signal and combines the self-interference signal into a mixed signal
  • the receiving module performs amplitude and phase adjustment on the transmitted signal to generate a sampling signal, delays the mixed signal, and performs hybrid descrambling on the sampled signal, and the output received signal is demodulated by the RF transmitting receiver. Transmitting to the central processor;
  • the transmitting module is a power amplifier, and the combiner transmits the transmitting signal to the antenna for transmitting, and combines the base station signal received by the antenna and the self-interference signal into a mixed signal output to the The receiving module.
  • the same-frequency full-duplex terminal for transmitting and receiving a shared antenna wherein the receiving module comprises a delay device, an adjustable attenuator, an adjustable phase shifter and a signal mixer;
  • the delay device is configured to delay generating the delayed signal by using the mixed signal
  • the adjustable attenuator is configured to perform amplitude attenuation on the transmitted signal to generate an attenuation signal
  • the adjustable phase shifter is configured to phase shift the attenuated signal to generate a sampling signal
  • the signal mixer is configured to mix the sampling signal with the delayed signal to eliminate self-interference, and output the received signal.
  • the simultaneous co-frequency full-duplex terminal of the shared-receive antenna wherein the amplitude of the sampling signal is equal to the amplitude of the self-interference signal.
  • the simultaneous co-frequency full-duplex terminal that transmits and receives a shared antenna, wherein a phase of the sampling signal is opposite to a phase of the self-interference signal.
  • the simultaneous co-frequency full-duplex terminal of the transmitting and receiving common antenna wherein a difference between a phase of the sampling signal and a phase of the self-interference signal is ⁇ .
  • the simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna, wherein the central processor is further configured to control amplitude adjustment of the adjustable attenuator and phase adjustment of the adjustable phase shifter in real time.
  • a simultaneous-frequency full-duplex terminal for transmitting and receiving a shared antenna, comprising a central processing unit and a radio frequency transmitting receiver, wherein the simultaneous intra-frequency full-duplex terminal further comprises a transmitting module, a receiving module and an antenna module; and the antenna module comprises An antenna
  • the transmitting data output by the central processing unit is modulated by the radio frequency transmitting receiver to obtain a radio frequency signal, and the transmitting module performs power amplification on the radio frequency signal, and then outputs a transmitting signal to the antenna of the antenna module to transmit;
  • the antenna module receives the base station signal and combines with the self-interference signal into a mixed signal; the receiving module performs amplitude and phase adjustment on the transmitted signal to generate a sampling signal, delays the mixed signal, and mixes with the sampling signal. The interference is cancelled, and the output received signal is demodulated by the radio frequency transmitting receiver and transmitted to the central processing unit.
  • the antenna module further includes a combiner; the first end of the combiner is connected to the transmitting module, and the second end of the combiner Connecting the receiving module, the third end of the combiner is connected to the antenna;
  • the combiner transmits the transmit signal to the antenna for transmission, and combines the base station signal received by the antenna and the self-interference signal into the mixed signal output to the receiving module.
  • the same-frequency full-duplex terminal for transmitting and receiving a shared antenna wherein the receiving module comprises a delay device, an adjustable attenuator, an adjustable phase shifter and a signal mixer;
  • the delay device is configured to delay generating the delayed signal by using the mixed signal
  • the adjustable attenuator is configured to perform amplitude attenuation on the transmitted signal to generate an attenuation signal
  • the adjustable phase shifter is configured to phase shift the attenuation signal to generate a sampling signal
  • the signal mixer is configured to mix the sampling signal with the delayed signal to eliminate self-interference, and output the received signal.
  • the simultaneous-frequency full-duplex terminal of the transmitting and receiving common antenna wherein the amplitude of the sampling signal is equal to the amplitude of the self-interference signal, the phase of the sampling signal is opposite to the phase of the self-interference signal, and The difference between the phase of the sampled signal and the phase of the self-interfering signal is ⁇ .
  • the simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna, wherein the central processor is further configured to control amplitude adjustment of the adjustable attenuator and phase adjustment of the adjustable phase shifter in real time.
  • the simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna, wherein the transmitting module is a power amplifier.
  • a method for communicating with a simultaneous-frequency full-duplex terminal using the above-mentioned transmitting and receiving shared antenna comprising:
  • Transmitting data output by the central processor is modulated by the radio frequency transmitting receiver to obtain a radio frequency signal;
  • the transmitting module performs power amplification on the radio frequency signal, and outputs a transmission signal to an antenna of the antenna module to transmit;
  • the antenna module receives a base station signal and combines with the self-interference signal into a mixed signal
  • the receiving module performs amplitude and phase adjustment on the transmitted signal to generate a sampling signal, and delays the mixed signal to perform hybrid cancellation with the sampling signal to output a received signal;
  • the received signal is demodulated by the RF transmit receiver and transmitted to a central processor.
  • the method for transmitting and receiving a common-frequency full-duplex terminal of a shared antenna wherein the receiving module performs amplitude and phase adjustment on the transmitted signal to generate a sampling signal, and delays the sampling and the sampling
  • the steps of the signal for hybrid descrambling to output the received signal include:
  • the receiving module Performing a delay signal on the mixed signal to generate a delay signal; the receiving module performing amplitude attenuation on the transmitted signal to generate an attenuation signal;
  • the received signal is transmitted to the radio frequency transmit receiver.
  • the method for transmitting and receiving a simultaneous-frequency full-duplex terminal of a shared antenna wherein an amplitude of the sampling signal is equal to an amplitude of the self-interference signal, and a phase of the sampling signal is opposite to a phase of the self-interference signal And the difference between the phase of the sampled signal and the phase of the self-interference signal is ⁇ .
  • the present invention provides a simultaneous-frequency full-duplex terminal for transmitting and receiving a shared antenna and a communication method thereof, and the transmission data output by the central processing unit is modulated by a radio frequency transmitting receiver to obtain a radio frequency signal, and the transmitting module is The RF signal is subjected to power amplification, and the output signal is output to the antenna of the antenna module.
  • the antenna module receives the base station signal and combines with the self-interference signal into a mixed signal; the receiving module performs amplitude and phase adjustment on the transmitted signal to generate a sample.
  • the antenna module includes an antenna, and the transmitting and receiving share an antenna, and the solution is solved.
  • the existing multi-antenna has the problem of high cost and high antenna placement requirements.
  • FIG. 1 is a structural block diagram of a simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna according to the present invention.
  • FIG. 2 is a schematic diagram of an application embodiment of a simultaneous-frequency full-duplex terminal for transmitting and receiving a shared antenna according to the present invention.
  • FIG. 3 is a flow chart of a communication method for a simultaneous-frequency full-duplex terminal of a transmitting and receiving shared antenna according to the present invention.
  • the invention provides a simultaneous co-frequency full-duplex terminal for transmitting and receiving a shared antenna and a communication method thereof, and the same antenna is shared by the transmitting and receiving of the same-frequency full-duplex terminal, that is, the transmitting channel and the receiving channel pass through the combiner and the shared device.
  • the same-frequency full-duplex is also an alternative key technology for the next-generation 5G communication.
  • the present invention advances the 5G technology and patents, and realizes the improvement of the existing CCFD technology.
  • the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • the same-frequency full-duplex terminal communicates with the CCFD base station, and the same-frequency full-duplex terminal includes a central processing unit 10, a radio frequency transmitting receiver 20, and a transmitting. Module 30, receiving module 40 and antenna module 50.
  • the central processing unit 10 is connected to the radio frequency transmitting receiver 20, the transmitting module 30 is connected to the radio frequency transmitting receiver 20 and the antenna module 50, and the receiving module 40 is connected to the radio frequency transmitting receiver 20 and the antenna module 50;
  • the antenna module 50 includes an antenna.
  • the central processing unit 10 transmits the transmission data to the radio frequency transmission receiver 20.
  • the radio frequency transmission receiver 20 modulates the transmission data, and then outputs the modulated radio frequency signal through the TX port, and the transmitting module 30 performs power amplification and transmission on the radio frequency signal.
  • the transmit signal Sr(t) of frequency fc is transmitted to the antenna module 50 to the CCFD base station.
  • the antenna module 50 receives the base station signal R(t) of the frequency fc transmitted by the CCFD base station, and combines with the self-interference signal to form a mixed signal.
  • the receiving module 40 attenuates and phase shifts the transmitted signal Sr(t) to generate a sampling signal aSr(t+ ⁇ t+ ⁇ ), and delays the mixed signal with the sampling signal aSr(t+ ⁇ t). + ⁇ ) Performs hybrid descrambling to generate a received signal R1(t+ ⁇ t) and transmits it to the RX port of the RF transmitting receiver 20.
  • the radio frequency transmitting receiver 20 transmits the received signal R1(t+ ⁇ t) demodulation processing to the central processing unit 10.
  • the transmitting module 30 is a power amplifier.
  • the receiving module 40 includes a delayer 410, an adjustable attenuator 420, an adjustable phase shifter 430, and a signal mixer 440.
  • the antenna module 50 includes a combiner 510 and an antenna 520.
  • the transmission channel is defined from the TX port of the RF transmitting receiver 20, through the transmitting module 30 to the first end of the combiner 510, and the receiving channel is delayed from the second end of the combiner 510.
  • the signal mixer 440 to the RX port of the RF transmitting receiver 20;
  • the sampling channel is the output from the output of the transmitting module, via the adjustable attenuator 420, the adjustable phase shifter 430 to the negative input of the signal mixer 440 End - so far.
  • the transmitting channel and the receiving channel of the same-frequency full-duplex terminal share the antenna.
  • the third end of the combiner 510 is connected to the antenna 520, the first end of the combiner 510 is connected to the output end of the transmitting module 30, and the second end of the combiner 510 is connected to the input of the delay unit 410.
  • the input end of the transmitting module 30 is connected to the TX port of the RF transmitting receiver 20; the output end of the delaying device 410 is connected to the positive input end of the signal mixer 440; the adjustable attenuator 420 is connected to the output end of the transmitting module 30,
  • the phase shifter 430, the central processing unit 10, and the antenna module 50 are adjusted.
  • Adjustable phase shifter 430 is coupled to the negative input of signal mixer 440 - and central processor 10.
  • the output of signal mixer 440 is coupled to the RX port of radio frequency transmit receiver 20.
  • the mixed signal outputted by the second end of the combiner 510 includes the first base station signal R1(t) after the antenna 520 receives the combiner, and the transmit signal output by the transmitting module 30 to the combiner and the antenna enters the receiving channel.
  • the delay unit 410 delays the mixed signal, that is, the first base station signal R1(t) and the self-interference signal S1(t), to generate a delay signal [R1(t+ ⁇ t)+ S1(t+ ⁇ t)].
  • the delay is to synchronize the delay of the self-interference signal entering the receiving channel with the signal of the first base station.
  • the adjustable attenuator 420 amplitude attenuates the transmit signal Sr(t) to generate an attenuation signal aSr(t).
  • the adjustable phase shifter 430 phase shifts the attenuation signal aSr(t) to generate a sampling signal aSr(t+ ⁇ t+ ⁇ ).
  • the signal mixer 440 compares the sampled signal aSr(t+ ⁇ t+ ⁇ ) with the delayed signal [R1(t+ ⁇ t)+ S1(t+ ⁇ t)] is mixed to eliminate self-interference, and the received signal R1(t+ ⁇ t) is output.
  • the signal S1(t+ ⁇ t) indicating the self-interference in the delayed signal and the sampling signal aSr(t+ ⁇ t+ ⁇ ) must cancel each other and cannot There is signal remaining. Therefore, the purpose of the attenuation and phase shift is to make the amplitude of the sampling signal aSr(t+ ⁇ t+ ⁇ ) equal to the amplitude of the self-interference signal, the phase is opposite, and the phase difference is ⁇ .
  • the self-interference signal S1(t+?t) is completely cancelled by the sampling signal aSr(t+?t+?), and only the received signal R1 indicating the true reception data is left (t + ⁇ t), thereby achieving the purpose of self-interference cancellation, achieving simultaneous co-frequency full-duplex communication.
  • the received signal R1(t+ ⁇ t) is transmitted to the RX port of the radio frequency transmitting receiver 20.
  • the RF transmitting receiver 20 demodulates the received signal R1(t+ ⁇ t) and transmits it to the central processing unit 10.
  • the central processing unit 10 controls the amplitude adjustment and phase adjustment of the sampling channel in real time to optimize the self-interference cancellation performance.
  • the present invention further provides a communication method for a simultaneous-frequency full-duplex terminal that transmits and receives a shared antenna, and the communication method includes:
  • the transmit data output by the central processing unit is modulated by the radio frequency transmitting receiver to obtain a radio frequency signal, and the transmitting module performs power amplification on the radio frequency signal, and then outputs a transmitting signal to the antenna of the antenna module for transmitting;
  • the antenna module receives the base station signal and combines with the self-interference signal to form a mixed signal; the receiving module adjusts the amplitude and phase of the transmitted signal to generate a sampling signal, delays the mixed signal, and performs mixing and descrambling with the sampling signal, and the output is received.
  • the signal is demodulated by the RF transmit receiver and transmitted to the central processor.
  • the step S200 specifically includes:
  • Step 201 The antenna module receives the base station signal and combines with the self-interference signal to form a mixed signal.
  • Step 202 The receiving module performs amplitude attenuation on the transmitted signal to generate an attenuation signal.
  • Step 203 Perform phase shifting on the attenuation signal to generate a sampling signal.
  • Step 204 mixing the sampling signal and the delay signal to eliminate self-interference, outputting the received signal and transmitting the signal to the radio frequency transmitting receiver;
  • Step 205 The radio frequency transmitting receiver demodulates the received signal and transmits the received signal to the central processing unit.
  • the radio frequency transmitting receiver demodulates the received signal and transmits the received signal to the central processing unit.
  • the transmitting and receiving of the present invention share an antenna to realize simultaneous communication between the same-frequency full-duplex terminal and the CCFD base station, and solve the problem that the existing multi-antenna leads to high cost and high antenna placement requirements;
  • the mixed signal is delayed, and the amplitude and phase of the transmitted signal are adjusted, so that the amplitudes of the self-interference signal and the sampled signal in the mixed signal are equal, the phases are opposite, and the phase difference is ⁇ , so that the self-interference signal can be eliminated, ensuring good performance.
  • Communication quality real-time control of the amplitude adjustment of the adjustable attenuator and phase adjustment of the adjustable phase shifter to achieve the best self-interference cancellation performance.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transceivers (AREA)
  • Radio Transmission System (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种收发共用天线的同时同频全双工终端及其通信方法，该终端包括：发射模块对经射频发射接收器调制获得的射频信号进行功率放大后，输出发射信号给天线模块；天线模块接收基站信号并与自干扰信号组合成混合信号；接收模块对该发射信号处理生成采样信号，对混合信号进行延迟后与该采样信号进行混合消扰。

Description

一种收发共用天线的同时同频全双工终端及其通信方法 技术领域
本发明涉及通信技术领域，尤其涉及的是一种收发共用天线的同时同频全双工终端及其通信方法。
 背景技术
CCFD（Co-frequency Co-time Full Duplex，同频同时全双工）无线通信设备使用相同的时间、相同的频率，同时发射和接收无线信号，使得无线通信链路的频谱效率提高了一倍。
现有的5G备选技术的同时同频全双工终端的天线均采用多天线方案，用多个天线来实现天线干扰消除和射频干扰消除的目的。多天线成本较高，且要求终端有足够的空间并按要求放置这些天线，如空间摆放实现天线对消等，这给终端设计带来很多困难，不但增加成本，还会增大终端体积。同时，CCFD发射机的发射信号会对本地接收机产生干扰，使用CCFD的首要工作是抑制强自干扰。自干扰消除能力将直接影响CCFD系统的通信质量。
本发明提出了发射和接收共用同一根天线的同时同频全双工终端，使同时同频全双工的发射和接收在共用一根天线的情况下解决同频自干扰消除问题。
因而现有技术还有待改进和提高。
 技术问题
鉴于上述现有技术的不足之处，本发明的目的在于提供一种收发共用天线的同时同频全双工终端及其通信方法，以达到同时同频全双工终端的发射和接收共用一根天线并实现自干扰抑制消除的目的。
 技术解决方案
一种收发共用天线的同时同频全双工终端，包括中央处理器和射频发射接收器，其中所述同时同频全双工终端还包括发射模块、接收模块和天线模块、合路器；所述天线模块包括一天线；所述合路器的第一端连接所述发射模块，所述合路器的第二端连接所述接收模块，所述合路器的第三端连接天线；
所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号，所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
所述天线模块接收基站信号并与自干扰信号组合成混合信号；以及
所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，对所述混合信号进行延迟后与所述采样信号进行混合消扰，输出的接收信号由所述射频发射接收器解调后传输给所述中央处理器；
其中，所述发射模块为功率放大器，所述合路器将所述发射信号传输给所述天线进行发射，及将所述天线接收的基站信号和所述自干扰信号组合成混合信号输出给所述接收模块。
所述的收发共用天线的同时同频全双工终端，其中所述接收模块包括延时器、可调衰减器、可调移相器和信号混合器；
所述延时器用于对所述混合信号进行延时生成延时信号；
所述可调衰减器用于对所述发射信号进行幅度衰减生成衰减信号；
所述可调移相器用于对所述衰减信号进行移相生成采样信号；以及
所述信号混合器用于将所述采样信号与所述延时信号进行混合以消除自干扰，输出所述接收信号。
所述的收发共用天线的同时同频全双工终端，其中所述采样信号的幅度与所述自干扰信号的幅度相等。
所述的收发共用天线的同时同频全双工终端，其中所述采样信号的相位与所述自干扰信号的相位相反。
所述的收发共用天线的同时同频全双工终端，其中所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
所述的收发共用天线的同时同频全双工终端，其中所述中央处理器还用于实时控制所述可调衰减器的幅度调整和所述可调移相器的相位调整。
一种收发共用天线的同时同频全双工终端，包括中央处理器和射频发射接收器，其中所述同时同频全双工终端还包括发射模块、接收模块和天线模块；所述天线模块包括一天线；
所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号，所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
所述天线模块接收基站信号并与自干扰信号组合成混合信号；所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，对所述混合信号进行延迟后与所述采样信号进行混合消扰，输出的接收信号由所述射频发射接收器解调后传输给所述中央处理器。
所述的收发共用天线的同时同频全双工终端，其中所述天线模块还包括合路器；所述合路器的第一端连接所述发射模块，所述合路器的第二端连接所述接收模块，所述合路器的第三端连接天线；
所述合路器将所述发射信号传输给所述天线进行发射，及将所述天线接收的基站信号和所述自干扰信号组合成所述混合信号输出给所述接收模块。
所述的收发共用天线的同时同频全双工终端，其中所述接收模块包括延时器、可调衰减器、可调移相器和信号混合器；
所述延时器用于对所述混合信号进行延时生成延时信号；
所述可调衰减器用于对所述发射信号进行幅度衰减生成衰减信号；
所述可调移相器用于对所述衰减信号进行移相生成采样信号；
所述信号混合器用于将所述采样信号与所述延时信号进行混合以消除自干扰，输出所述接收信号。
所述的收发共用天线的同时同频全双工终端，其中所述采样信号的幅度与所述自干扰信号的幅度相等、所述采样信号的相位与所述自干扰信号的相位相反、且所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
所述的收发共用天线的同时同频全双工终端，其中所述中央处理器还用于实时控制所述可调衰减器的幅度调整和所述可调移相器的相位调整。
所述的收发共用天线的同时同频全双工终端，其中所述发射模块为功率放大器。
一种采用上述收发共用天线的同时同频全双工终端进行通信的方法，其包括：
所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号；
所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
所述天线模块接收基站信号并与自干扰信号组合成混合信号；
所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，并对所述混合信号进行延迟后与所述采样信号进行混合消扰，以输出接收信号；
由所述射频发射接收器对所述接收信号解调后传输给中央处理器。
所述的收发共用天线的同时同频全双工终端的通信方法，其中所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，并对所述混合信号进行延迟后与所述采样信号进行混合消扰，以输出的接收信号的步骤包括：
对所述混合信号进行延时生成延时信号；所述接收模块对所述发射信号进行幅度衰减生成衰减信号；
对所述衰减信号进行移相生成采样信号；
将所述采样信号与所述延时信号进行混合以消除自干扰，以输出所述接收信号；
将所述接收信号传输至所述射频发射接收器。
所述的收发共用天线的同时同频全双工终端的通信方法，其中所述采样信号的幅度与所述自干扰信号的幅度相等、所述采样信号的相位与所述自干扰信号的相位相反、且所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
 有益效果
相较于现有技术，本发明提供的收发共用天线的同时同频全双工终端及其通信方法，中央处理器输出的发射数据经射频发射接收器调制获得射频信号，所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；所述天线模块接收基站信号并与自干扰信号组合成混合信号；接收模块对所述发射信号进行幅度和相位调整生成采样信号，对所述混合信号进行延迟后与所述采样信号进行混合消扰，从而可将自干扰信号消除，确保良好的通信质量；天线模块包括一天线，发射和接收共用一根天线，解决了现有用多天线导致成本高、天线放置要求高的问题。
附图说明
图1是本发明提供的收发共用天线的同时同频全双工终端的结构框图。
图2是本发明提供的收发共用天线的同时同频全双工终端的应用实施例示意图。
图3是本发明提供的收发共用天线的同时同频全双工终端的通信方法流程图。
 本发明的最佳实施方式
本发明提供一种收发共用天线的同时同频全双工终端及其通信方法，同时同频全双工终端的发射和接收共用同一根天线，即发射通道与接收通道通过合路器与共用的天线连接；在接收通道上增加延时器以实现对接收到的自干扰信号和采样信号进行时延同步；还能根据收到的信号实时控制采样通道的幅度调整和相位调整，以使自干扰消除性能最佳。同时同频全双工也是下一代5G通信的备选关键技术，本发明为对5G技术及专利的提前布局，实现了对现有CCFD技术的改进。为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
请同时参阅图1和图2，本发明提供的收发共用天线的同时同频全双工终端与CCFD基站通讯，该同时同频全双工终端包括中央处理器10、射频发射接收器20、发射模块30、接收模块40和天线模块50。所述中央处理器10连接射频发射接收器20，发射模块30连接射频发射接收器20和天线模块50，接收模块40连接射频发射接收器20和天线模块50; 所述天线模块50包括一根天线。
所述中央处理器10将发射数据传给射频发射接收器20，射频发射接收器20对发射数据进行调制后经TX端口输出已调制的射频信号，发射模块30对该射频信号进行功率放大后传输频率为fc的发射信号Sr（t）给天线模块50发射给CCFD基站。
所述天线模块50接收CCFD基站发送的频率为fc的基站信号R（t）、并与自干扰信号组合成混合信号。所述接收模块40一方面对发射信号Sr（t）进行衰减、移相生成采样信号aSr（t+Δt+π），另一方面对混合信号进行延迟后与所述采样信号aSr（t+Δt+π）进行混合消扰，生成接收信号R1（t+Δt）并传输至射频发射接收器20的RX端口。射频发射接收器20对接收信号R1（t+Δt）解调处理传输给中央处理器10。
其中，所述发射模块30为功率放大器。所述接收模块40包括延时器410、可调衰减器420、可调移相器430和信号混合器440。所述天线模块50包括合路器510和天线520。本实施例定义发射通道为从射频发射接收器20的TX端口开始、经发射模块30至合路器510的第一端为止；接收通道为从合路器510的第二端开始、经延时器410、信号混合器440至射频发射接收器20的RX端口为止；采样通道为从发射模块的输出端开始，经可调衰减器420、可调移相器430至信号混合器440的负输入端-为止。
为了解决现有同时同频全双工终端的天线为多天线方案导致成本较高，增加设计难度和终端体积的问题，本实施例的同时同频全双工终端的发射通道和接收通道共用天线520。则所述合路器510的第三端连接天线520，所述合路器510的第一端连接发射模块30的输出端，所述合路器510的第二端连接延时器410的输入端；发射模块30的输入端连接射频发射接收器20的TX端口；延时器410的输出端连接信号混合器440的正输入端+；可调衰减器420连接发射模块30的输出端、可调移相器430、中央处理器10和天线模块50。可调移相器430连接信号混合器440的负输入端-和中央处理器10。信号混合器440的输出端连接射频发射接收器20的RX端口。
所述天线520的通道CH天线（即从合路器的第三端至天线520之间的通道）传输的信号包括本机发射信号S(t)和接收到的基站信号R(t)，即CH天线=S(t)+R(t)。合路器510的第二端输出的混合信号包括天线520接收经合路器后的第一基站信号R1(t)，由发射模块30输出给合路器的发射信号及天线进入接收通道的自干扰信号S1(t)，即合路器510与延时器410之间传输的信号为CH1=R1(t)+S1(t)。
所述延时器410对混合信号、即第一基站信号R1(t)和自干扰信号S1(t)进行延时生成延时信号[R1（t+Δt）+ S1(t+△t)]。延时是为了实现进入接收通道的自干扰信号和第一基站信号的时延同步。
所述可调衰减器420对发射信号Sr（t）进行幅度衰减生成衰减信号aSr（t）。所述可调移相器430对所述衰减信号aSr（t）进行移相生成采样信号aSr（t+Δt+π）。所述信号混合器440将采样信号aSr（t+Δt+π）与延时信号[R1（t+Δt）+ S1(t+△t)]进行混合以消除自干扰，输出接收信号R1（t+Δt）。
为了使接收通道和采样通道混合后的信号能完全消除自干扰，则延时信号中表示自干扰的信号S1(t+△t)与采样信号aSr(t+△t+π)必须能相互抵消且不能有信号余留。因此，衰减、移相的目的即是使采样信号aSr(t+△t+π)的幅度与自干扰信号的幅度相等，相位相反且相位差为π。则表示自干扰的信号S1(t+△t)与采样信号aSr(t+△t+π)混合的结果为：S1(t+△t)+aSr(t+△t+π)= S1(t+△t)-aSr(t+△t)=0。由此可知，延时信号与采样信号混合的结果为：R1(t+△t)+S1(t+△t)+aSr(t+△t+π) =R1(t+△t)。这样由信号混合器440混合后，表示自干扰的信号S1(t+△t)被采样信号aSr(t+△t+π)完全抵消掉，只剩下表示正真的接收数据的接收信号R1（t+Δt），从而达到了自干扰消除的目的，实现同时同频全双工通信。
接收信号R1（t+Δt）传输至射频发射接收器20的RX端口。射频发射接收器20对接收信号R1（t+Δt）进行解调处理后传输给中央处理器10。中央处理器10会实时控制采样通道的幅度调整和相位调整，以使自干扰消除性能最佳。
基于上述的收发共用天线的同时同频全双工终端，本发明还提供一种收发共用天线的同时同频全双工终端的通信方法，请一并参阅图3，所述通信方法包括：
S100、中央处理器输出的发射数据经射频发射接收器调制获得射频信号，发射模块对所述射频信号进行功率放大后输出发射信号给天线模块的天线进行发射；
S200、天线模块接收基站信号并与自干扰信号组合成混合信号；接收模块对发射信号进行幅度和相位调整生成采样信号，对混合信号进行延迟后与所述采样信号进行混合消扰，输出的接收信号由射频发射接收器解调后传输给中央处理器。
所述步骤S200具体包括：
步骤201、天线模块接收基站信号并与自干扰信号组合成混合信号；
步骤202、接收模块对发射信号进行幅度衰减生成衰减信号；
步骤203、对所述衰减信号进行移相生成采样信号；
步骤204、将采样信号与延时信号进行混合以消除自干扰，输出接收信号并传输至射频发射接收器；
步骤205、射频发射接收器对所述接收信号进行解调后传输给中央处理器。具体请参见上述实施例。
综上所述，本发明的发射和接收共用一根天线来实现同时同频全双工终端与CCFD基站的通讯，解决了现有用多天线导致成本高、天线放置要求高的问题；同时，通过对混合信号进行延时，对发射信号进行幅度和相位调整，使混合信号中的自干扰信号和采样信号的幅度相等，相位相反且相位差为π，从而可将自干扰信号消除，确保良好的通信质量；还实时控制可调衰减器的幅度调整和可调移相器的相位调整，使自干扰消除性能达到最佳。
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。

Claims (15)

  1. 一种收发共用天线的同时同频全双工终端，包括中央处理器和射频发射接收器，其中所述同时同频全双工终端还包括发射模块、接收模块和天线模块、合路器；所述天线模块包括一天线；所述合路器的第一端连接所述发射模块，所述合路器的第二端连接所述接收模块，所述合路器的第三端连接天线；
    所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号，所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
    所述天线模块接收基站信号并与自干扰信号组合成混合信号；以及
    所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，对所述混合信号进行延迟后与所述采样信号进行混合消扰，输出的接收信号由所述射频发射接收器解调后传输给所述中央处理器；
    其中，所述发射模块为功率放大器，所述合路器将所述发射信号传输给所述天线进行发射，及将所述天线接收的基站信号和所述自干扰信号组合成混合信号输出给所述接收模块。
  2. 根据权利要求1所述的收发共用天线的同时同频全双工终端，其中所述接收模块包括延时器、可调衰减器、可调移相器和信号混合器；
    所述延时器用于对所述混合信号进行延时生成延时信号；
    所述可调衰减器用于对所述发射信号进行幅度衰减生成衰减信号；
    所述可调移相器用于对所述衰减信号进行移相生成采样信号；以及
    所述信号混合器用于将所述采样信号与所述延时信号进行混合以消除自干扰，输出所述接收信号。
  3. 根据权利要求2所述的收发共用天线的同时同频全双工终端，其中所述采样信号的幅度与所述自干扰信号的幅度相等。
  4. 根据权利要求2所述的收发共用天线的同时同频全双工终端，其中所述采样信号的相位与所述自干扰信号的相位相反。
  5. 根据权利要求4所述的收发共用天线的同时同频全双工终端，其中所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
  6. 根据权利要求2所述的收发共用天线的同时同频全双工终端，其中所述中央处理器还用于实时控制所述可调衰减器的幅度调整和所述可调移相器的相位调整。
  7. 一种收发共用天线的同时同频全双工终端，包括中央处理器和射频发射接收器，其中所述同时同频全双工终端还包括发射模块、接收模块和天线模块；所述天线模块包括一天线；
    所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号，所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
    所述天线模块接收基站信号并与自干扰信号组合成混合信号；所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，对所述混合信号进行延迟后与所述采样信号进行混合消扰，输出的接收信号由所述射频发射接收器解调后传输给所述中央处理器。
  8. 根据权利要求7所述的收发共用天线的同时同频全双工终端，其中所述天线模块还包括合路器；所述合路器的第一端连接所述发射模块，所述合路器的第二端连接所述接收模块，所述合路器的第三端连接天线；
    所述合路器将所述发射信号传输给所述天线进行发射，及将所述天线接收的基站信号和所述自干扰信号组合成所述混合信号输出给所述接收模块。
  9. 根据权利要求8所述的收发共用天线的同时同频全双工终端，其中所述接收模块包括延时器、可调衰减器、可调移相器和信号混合器；
    所述延时器用于对所述混合信号进行延时生成延时信号；
    所述可调衰减器用于对所述发射信号进行幅度衰减生成衰减信号；
    所述可调移相器用于对所述衰减信号进行移相生成采样信号；
    所述信号混合器用于将所述采样信号与所述延时信号进行混合以消除自干扰，输出所述接收信号。
  10. 根据权利要求9所述的收发共用天线的同时同频全双工终端，其中所述采样信号的幅度与所述自干扰信号的幅度相等、所述采样信号的相位与所述自干扰信号的相位相反、且所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
  11. 根据权利要求9所述的收发共用天线的同时同频全双工终端，其中所述中央处理器还用于实时控制所述可调衰减器的幅度调整和所述可调移相器的相位调整。
  12. 根据权利要求7所述的收发共用天线的同时同频全双工终端，其中所述发射模块为功率放大器。
  13. 一种采用权利要求7所述的收发共用天线的同时同频全双工终端的通信方法，其包括：
    所述中央处理器输出的发射数据经所述射频发射接收器调制获得射频信号；
    所述发射模块对所述射频信号进行功率放大后输出发射信号给所述天线模块的天线发射；
    所述天线模块接收基站信号并与自干扰信号组合成混合信号；
    所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，并对所述混合信号进行延迟后与所述采样信号进行混合消扰，以输出接收信号；
    由所述射频发射接收器对所述接收信号解调后传输给中央处理器。
  14. 根据权利要求13所述的收发共用天线的同时同频全双工终端的通信方法，其中所述接收模块对所述发射信号进行幅度和相位调整生成采样信号，并对所述混合信号进行延迟后与所述采样信号进行混合消扰，以输出的接收信号的步骤包括：
    对所述混合信号进行延时生成延时信号；所述接收模块对所述发射信号进行幅度衰减生成衰减信号；
    对所述衰减信号进行移相生成采样信号；
    将所述采样信号与所述延时信号进行混合以消除自干扰，以输出所述接收信号；
    将所述接收信号传输至所述射频发射接收器。
  15. 根据权利要求14所述的收发共用天线的同时同频全双工终端的通信方法，其中所述采样信号的幅度与所述自干扰信号的幅度相等、所述采样信号的相位与所述自干扰信号的相位相反、且所述采样信号的相位与所述自干扰信号的相位之间的差值为π。
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