轮流中继系统物理层安全传输方案  

Improving Security in Successive Relaying Systems by Exploiting Inter-Relay Interference

作　　者：邹羿 黄开枝[1] 李明亮[1] ZOU Yi;HUANG Kaizhi;LI Mingliang(National Digital Switching System Engineering and Technological R＆D Center,Zhengzhou 450002,China)

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002

出　　处：《信息工程大学学报》2018年第3期264-269,共6页Journal of Information Engineering University

基　　金：国家863计划资助项目(2014AA01A701);国家自然科学基金资助项目(61379006)

摘　　要：针对轮流中继系统的外部窃听问题,提出轮流中继系统物理层安全传输方案。首先,利用中继间干扰恶化窃听者的窃听;然后,通过合法节点接收信号之间的相关性消除中继间干扰对目的节点的影响,提高合法用户接收信号质量;最后,设计提出最大化保密速率的发射功率分配算法。仿真结果表明,在仿真条件下,采用安全方案后轮流中继系统的保密速率提升了至少3 bits/s/Hz。To solve eavesdropping problem in successive relaying systems, a physical-layer security scheme based on inter-relay interference iterative elimination is proposed. Inter-relay interference is exploited as artificial noise to degrade eavesdropper’s channel quality, and is eliminated at user by making use of correlation between adjacent receiving signals. Then a quick power allocation algorithm at transmitter is proposed to maximize secrecy rate. Simulation results show that the proposed scheme improves secrecy rate of the successive relaying system by at least 3 bits/s/Hz.

关 键 词：物理层安全 轮流中继 干扰消除 功率分配 

分 类 号：TN929.5[电子电信—通信与信息系统]