频率捷变的全双工数字自干扰抑制方法  

Digital self-interference cancellation method for frequency agility full duplex system

作　　者：皇甫雅帆 杨春[1] 秋勇涛 刘友江[1] Huangfu Yafan;Yang Chun;Qiu Yongtao;Liu Youjiang(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621900,China;Dept.of Engineering Physics,Tsinghua University,Beijing 100084,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621900 [2]清华大学工程物理系,北京100084

出　　处：《计算机应用研究》2020年第3期884-886,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(61601425);中国工程物理研究院院长基金资助项目(YZJJLX2017006)。

摘　　要：针对极端频谱环境中强干扰对全双工(full duplex,FD)系统性能的影响,提出了一种适用于频率捷变的全双工数字自干扰抑制(digital self-interference cancellation,DSIC)方法。通过离线运算获取工作频带范围内的误差补偿模型,并利用该模型实时生成捷变频点的自干扰(self-interference,SI)信道参数以重建自干扰信号并完成数字对消。数值仿真结果表明该方法在系统工作频带范围内可将自干扰抑制到噪底以下,并在整个频带具有较高一致性和良好的收敛性。To overcome the effects of the intense jam for the FD systems in the extreme spectrum environment,this paper proposed a novel DSIC method that adapted to the frequency agility FD systems.The error compensation model of the full working band was calculated offline and could generate the SI channel coefficients real-timely to reconstruct the SI signal and accomplish the DSIC.The numerical simulation results indicate that the level of the residual SI signal after the DSIC is below the noise floor level in the full band,which also demonstrate the consistency and convergence of this method at different frequency points.

关 键 词：数字自干扰抑制 频率捷变 全双工 

分 类 号：TN929.5[电子电信—通信与信息系统]