Self-interference cancellation for cooperative jamming communications with nonideal alignment and channel equalization  

作　　者：Wenbo GUO Yimin HE Hongzhi ZHAO Shihai SHAO Youxi TANG 

机构地区：[1]National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China,Chengdu 611731,China

出　　处：《Science China(Information Sciences)》2021年第11期203-211,共9页中国科学（信息科学）（英文版）

基　　金：supported by National Key Research and Development Program of China(Grant No.2018YFB1801903);National Natural Science Foundation of China(Grant Nos.61771107,61701075,61601064,61531009);Sichuan Science and Technology Program(Grant No.2019JDRC0006)。

摘　　要：For the security of wireless communications, cooperative jamming can be used to intentionally degrade the signal-to-noise ratios received by eavesdroppers. Unfortunately, this jamming may also propagate to the legal receiver and then become a harmful self-interference(SI), which should be cancelled for reliable detection of the desired signal. In this paper, by comprehensively considering nonideal time-frequency alignment and channel equalization, SI-cancellation capability is investigated for the additive white Gaussian noise channel. Theoretical and simulation results demonstrated that the impact of the frequency alignment error is more serious than that of the time alignment and channel equalization errors. Moreover, it is illustrated that weaker SI power can tolerate a larger range of those nonidealities.

关 键 词：cooperative jamming SELF-INTERFERENCE time-frequency alignment channel equalization nonidealities 

分 类 号：TN975[电子电信—信号与信息处理]