Polarization-based optimal detection scheme for digital self-interference cancellation in full-duplex system  

作　　者：Adil Khan Zhang Jinling Muhammad Ayzed Mirza Sibghat Ullah Erum Ab basi Babar Hayat 

机构地区：[1]School of Electronic Engineering,Beijing University of Posts and Telecom munication,Beijing 100876,China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2020年第3期73-82,共10页中国邮电高校学报（英文版）

基　　金：This work was supported by the Fundamental Research Funds for the Central Universities(2019XD-A07);the National Natural Science Foundation of China(61771063);the Huawei Innovation Research Program(HIRP)(2018040300246).

摘　　要：In order to detect and cancel the self-interference(SI)signal from desired binary phase-shift keying(BPSK)signal,the polarization-based optimal detection(POD)scheme for cancellation of digital SI in a full-duplex(FD)system is proposed.The POD scheme exploits the polarization domain to isolate the desired signal from the SI signal and then cancel the SI to obtain the interference-free desired signal at the receiver.In FD communication,after antenna and analog cancellation,the receiver still contains residual SI due to non-linearities of hardware imperfections.In POD scheme,a likelihood ratio expression is obtained,which isolates and detects SI bits from the desired bits.After isolation of these signal points,the POD scheme cancels the residual SI.As compared to the conventional schemes,the proposed POD scheme gives significantly low bit error rate(BER),a clear constellation diagram to obtain the boundary between desired and SI signal points,and increases the receiver's SI cancellation performance in low signal to interference ratio(SIR)environment.

关 键 词：POLARIZATION full-duplex self-interference cancellation optimal detection 

分 类 号：TN929.5[电子电信—通信与信息系统]