基于射频耦合与数字重建的同址干扰对消
|
摘要
提出了一种改进的联合射频耦合与数字重建的射频域对消方法.射频耦合对消阶段根据最小化加权信道响应原则优化抽头系数,将干扰强度更高的线性成分赋予较大权重,等效减小了多抽头对消带宽,从而增大该阶段干扰对消比.数字重建射频对消阶段对发射机功放、干扰信道和多抽头射频对消结构联合建立非线性模型,采用最小二乘法提取模型参数,在数字域重构干扰信号并利用射频链路发送到射频域以对消剩余干扰.仿真结果表明:该方法在降低硬件复杂度的同时仍能获得高对消比.
An improved interference cancelling method in radio frequency(RF) domain was proposed,which combined RF coupling and digital reconstruction.In RF coupling cancellation phase,tap coefficients were optimized under the criteria of minimizing the weighted channel response by giving the strong linear interference component bigger weight,which equivalently reduced the cancelling bandwidth of the multi-tap structure,resulting in improved cancellation performance of this phase.In digital reconstruction phase,a joint nonlinear model was built,in which the transmitter power amplifier and the interference channel together with the RF multi-tap cancellation structure were comprised.The least square(LS) algorithm was implemented to extract the model parameter,and then the interference signal was reconstructed in digital domain and subsequently transmitted to RF domain to cancel the residual interference utilizing an extra RF chain.Simulation results show that the proposed method can reduce hardware complexity while still obtaining high interference cancellation ratio.
An improved interference cancelling method in radio frequency(RF) domain was proposed,which combined RF coupling and digital reconstruction.In RF coupling cancellation phase,tap coefficients were optimized under the criteria of minimizing the weighted channel response by giving the strong linear interference component bigger weight,which equivalently reduced the cancelling bandwidth of the multi-tap structure,resulting in improved cancellation performance of this phase.In digital reconstruction phase,a joint nonlinear model was built,in which the transmitter power amplifier and the interference channel together with the RF multi-tap cancellation structure were comprised.The least square(LS) algorithm was implemented to extract the model parameter,and then the interference signal was reconstructed in digital domain and subsequently transmitted to RF domain to cancel the residual interference utilizing an extra RF chain.Simulation results show that the proposed method can reduce hardware complexity while still obtaining high interference cancellation ratio.
引文
[1]KIAYANI A,WAHEED M Z,ANTTIL L,et al.Adaptive nonlinear RF cancellation for improved isolation in simultaneous transmit-receive systems[J].IEEE Transactions on Microwave Theory and Techniques,2017,66(5):2299-2312.
[2]CHOI Y S,SHIRANI-MEHR H.Simultaneous transmission and reception:algorithm,design and system level performance[J].IEEE Transactions on Wireless Communications,2013,12(12):5992-6010.
[3]CHOI J I,JAIN M,SRINIVASAN K,et al.Achieving single channel,full duplex wireless communication[C]//Proc of International Conference on Mobile Computing and Networking.Chicago:ACM,2010:1-12.
[4]吴飞,邵士海,唐友喜.一种基于多天线波束成形的全双工自干扰抵消算法[J].电子学报,2017,45(1):8-15.
[5]LI W,ZHAO Z,TANG J,et al.Performance analysis and optimal design of the adaptive interference cancellation system[J].IEEE Transactions on Electromagnetic Compatibility,2013,55(6):1068-1075.
[6]刘建成,全厚德,李召瑞,等.多路延迟正交合成的多径信道射频干扰对消[J].电子与信息学报,2017,39(3):654-661.
[7]MCMICHAEL J G,KOLODZIEJ K E.Optimal tuning of analog self-interference cancellers for full-duplex wireless communication[C]//Proc of Allerton Conference on Communication,Control,and Computing.Monticello:IEEE,2012:246-251.
[8]KOLODZIEJ K E,MCMICHAEL J G,PERRY B T.Multitap RF canceller for in-band full-duplex wireless communications[J].IEEE Transactions on Wireless Communications,2016,15(6):4321-4334.
[9]DUARTE M,SABHARWAL A.Full-duplex wireless communications using off-the-shelf radios:feasibility and first results[C]//Proc of Asilomar Conference on Signals,Systems and Computers.Pacific Grove:IEEE,2010:1558-1562.
[10]LIU Y,QUAN X,PAN W,et al.Digitally assisted analog interference cancellation for in-band full-duplex radios[J].IEEE Communications Letters,2017,21(5):1079-1082.
[11]KIAYANI A,ANTTILA L,VALKAMA M.Active RFcancellation of nonlinear TX leakage in FDD transceivers[C]//Proc of IEEE Global Conference on Signal and Information Processing.Washington:IEEE,2016:689-693.
[12]QUAN X,LIU Y,PAN W,et al.A two-stage analog cancellation architecture for self-interference suppression in full-duplex communications[C]//Proc of IEEE MTT-SInternational Microwave Symposium.Honololu:IEEE,2017:1169-1172.
[13]LIU Y,ROBLIN P,QUAN X,et al.A full-duplex transceiver with two-stage analog cancellations for multipath self-interference[J].IEEE Transactions on Microwave Theory and Techniques,2017,65(12):5263-5273.
[14]KORPI D,CHOI Y S,HUUSARI T,et al.Adaptive nonlinear digital self-interference cancellation for mobile inband full-duplex radio:algorithms and RF measurements[C]//Proc of IEEE Global Communications Conference.San Diego:IEEE,2015:1-7.
[15]李伟,孟进,何方敏,等.基于变因子迭代的峰值功率降低方法[J].华中科技大学学报:自然科学版,2016,44(9):38-42.
[16]钟佩琳,王红星,刘传辉,等.一种并行两箱预失真方法[J].华中科技大学学报:自然科学版,2014,42(2):86-90.
[17]WU X,SHEN Y,TANG Y.The power delay profile of the single-antenna full-duplex self-interference channel in indoor environments at 2.6 GHz[J].IEEE Antennas and Wireless Propagation Letters,2014,13(4):1561-1564.
[18]DING L,ZHOU G T,MORGAN D R,et al.A robust digital baseband predistorter constructed using memory polynomials[J].IEEE Trans on Communications,2004,52(1):159-165.
[2]CHOI Y S,SHIRANI-MEHR H.Simultaneous transmission and reception:algorithm,design and system level performance[J].IEEE Transactions on Wireless Communications,2013,12(12):5992-6010.
[3]CHOI J I,JAIN M,SRINIVASAN K,et al.Achieving single channel,full duplex wireless communication[C]//Proc of International Conference on Mobile Computing and Networking.Chicago:ACM,2010:1-12.
[4]吴飞,邵士海,唐友喜.一种基于多天线波束成形的全双工自干扰抵消算法[J].电子学报,2017,45(1):8-15.
[5]LI W,ZHAO Z,TANG J,et al.Performance analysis and optimal design of the adaptive interference cancellation system[J].IEEE Transactions on Electromagnetic Compatibility,2013,55(6):1068-1075.
[6]刘建成,全厚德,李召瑞,等.多路延迟正交合成的多径信道射频干扰对消[J].电子与信息学报,2017,39(3):654-661.
[7]MCMICHAEL J G,KOLODZIEJ K E.Optimal tuning of analog self-interference cancellers for full-duplex wireless communication[C]//Proc of Allerton Conference on Communication,Control,and Computing.Monticello:IEEE,2012:246-251.
[8]KOLODZIEJ K E,MCMICHAEL J G,PERRY B T.Multitap RF canceller for in-band full-duplex wireless communications[J].IEEE Transactions on Wireless Communications,2016,15(6):4321-4334.
[9]DUARTE M,SABHARWAL A.Full-duplex wireless communications using off-the-shelf radios:feasibility and first results[C]//Proc of Asilomar Conference on Signals,Systems and Computers.Pacific Grove:IEEE,2010:1558-1562.
[10]LIU Y,QUAN X,PAN W,et al.Digitally assisted analog interference cancellation for in-band full-duplex radios[J].IEEE Communications Letters,2017,21(5):1079-1082.
[11]KIAYANI A,ANTTILA L,VALKAMA M.Active RFcancellation of nonlinear TX leakage in FDD transceivers[C]//Proc of IEEE Global Conference on Signal and Information Processing.Washington:IEEE,2016:689-693.
[12]QUAN X,LIU Y,PAN W,et al.A two-stage analog cancellation architecture for self-interference suppression in full-duplex communications[C]//Proc of IEEE MTT-SInternational Microwave Symposium.Honololu:IEEE,2017:1169-1172.
[13]LIU Y,ROBLIN P,QUAN X,et al.A full-duplex transceiver with two-stage analog cancellations for multipath self-interference[J].IEEE Transactions on Microwave Theory and Techniques,2017,65(12):5263-5273.
[14]KORPI D,CHOI Y S,HUUSARI T,et al.Adaptive nonlinear digital self-interference cancellation for mobile inband full-duplex radio:algorithms and RF measurements[C]//Proc of IEEE Global Communications Conference.San Diego:IEEE,2015:1-7.
[15]李伟,孟进,何方敏,等.基于变因子迭代的峰值功率降低方法[J].华中科技大学学报:自然科学版,2016,44(9):38-42.
[16]钟佩琳,王红星,刘传辉,等.一种并行两箱预失真方法[J].华中科技大学学报:自然科学版,2014,42(2):86-90.
[17]WU X,SHEN Y,TANG Y.The power delay profile of the single-antenna full-duplex self-interference channel in indoor environments at 2.6 GHz[J].IEEE Antennas and Wireless Propagation Letters,2014,13(4):1561-1564.
[18]DING L,ZHOU G T,MORGAN D R,et al.A robust digital baseband predistorter constructed using memory polynomials[J].IEEE Trans on Communications,2004,52(1):159-165.