全双工无线通信中射频自干扰抑制的凸优化分析  

Convex optimization analysis of radio frequency self-interference suppression in full-duplex wireless communication

作　　者：周娟 刘岚 陈超[1] 何梦 沈莹[2] ZHOU Juan;LIU Lan;CHEN Chao;HE Meng;SHEN Ying(College of Communication Engineering,Chengdu University of Information Technology,Chengdu 610225,China;Lab of Anti⁃interference Communication,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]成都信息工程大学通信工程学院,四川成都610225 [2]电子科技大学通信抗干扰实验室,四川成都611731

出　　处：《现代电子技术》2020年第11期29-32,36,共5页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61601064)。

摘　　要：全双工无线通信网络中,通过有效的自干扰抑制手段,终端设备可以采用同时同频收发的全双工模式工作。文中主要研究的是有用信号对射频域自干扰抑制性能的影响。通过对射频自干扰抑制性能的分析,可以看出,在不存在有用信号的情况下,射频自干扰抑制是一个凸优化问题,可以得到最优估计参数及最佳射频干扰抑制性能。当有用信号存在且信道时变,射频自干扰抑制不再是凸优化问题,自干扰抑制能力下降。实验仿真验证了理论分析结果,进一步表明有用信号的信道条件是限制射频域自干扰抑制性能的重要因素,且在非凸优化情况下,干扰抑制性能恶化。With the efficient means of self-interference suppression,the terminal equipment in full-duplex wireless communication network is allowed to transmit and receive signals in full-duplex pattern simultaneously in the same frequency band. The effect of useful signals on the self-interference suppression performance of the radio frequency(RF)domain is studied mainly in this paper. By analyzing the performance of RF self-interference suppression,it can be found that,in the absence of useful signals, RF self-interference suppression belongs to a convex optimization category, and the optimal estimation parameters and optimal RF interference cancellation performance can be obtained. However,when the useful signal exists and the channel is time-variant,the RF self-interference suppression is no longer a convex optimization problem,and the self-interference suppression capability is degraded. The theoretical analysis results were verified by both the simulation and the experiment,which further show that the channel condition of the useful signal is an important factor limiting the self-interference suppression performance of the RF domain,and the interference suppression performance is degraded under the condition of nonconvex optimization.

关 键 词：凸优化分析 无线通信 全双工模式 射频域自干扰抑制 理论分析 仿真验证 

分 类 号：TN92-34[电子电信—通信与信息系统]