人工噪声辅助MIMO系统下数据信号功率占比的误码率研究  

Bit Error Rate of Data Signal Power Allocation Ratio under Artificial Noise-Assisted MIMO System

作　　者：李闻 宋欢欢[1,2] 唐杰 文红[1,2] 郁子阳 刘雍煌[1,2] LI Wen;SONG Huanhuan;TANG Jie;WEN Hong;YU Ziyang;LIU Yonghuang(University of Electronic Science and Technology of China,Chengdu Sichuan 611731,China;Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province,Chengdu Sichuan 611731,China)

机构地区：[1]电子科技大学,四川成都611731 [2]飞行器集群智能感知与协同控制四川省重点实验室,四川成都611731

出　　处：《通信技术》2023年第6期768-771,共4页Communications Technology

基　　金：四川省自然科学基金(2022NSFSC0946)。

摘　　要：针对多输入多输出(Multiple-Input Multiple-Output,MIMO)无线通信系统传输过程中的安全问题,提出了一种基于人工噪声辅助的安全传输方法。首先,建立人工噪声辅助MIMO系统的信道状态矩阵;其次,将信道状态矩阵进行奇异值分解,设计合理的预编码和人工噪声矩阵,从而显著提升MIMO系统的安全性。对于窃听节点的译码采用最大似然检测译码。仿真结果表明,利用MIMO系统信道信息的零空间矩阵,采用人工噪声进行信号加密,有效提高了潜在窃听节点的误码率,当合法信道质量降低时,通过降低分配数据信号功率系数来提高MIMO无线系统的窃听误码率。Aiming at the security problems in the transmission process of MIMO(Multiple-Input Multiple-Output)wireless communication system,a secure transmission method based on artificial noise assistance is proposed.First,the channel state information matrix of artificial noise-assisted MIMO system is established,and then the channel state information matrix is subjected to singular value decomposition,and a reasonable precoding and artificial noise matrix are designed to significantly improve the security of the MIMO system.For the decoding of eavesdropping nodes,the maximum likelihood detection is used to decode.Simulation results indicate that based on the null-space matrix of MIMO system channel state information,the artificial noise is adopted to encrypt the signal,which effectively improves the bit error rate of potential eavesdropping nodes.When the legal channel quality decreases,the eavesdropping bit error rate of MIMO wireless system is improved by reducing the power coefficient of the allocated data signal.

关 键 词：物理层安全 人工噪声 MIMO 误码率 

分 类 号：TN918[电子电信—通信与信息系统]