无线能量采集技术下的全双工中继系统安全性能分析  

Security Performance Analysis of Full Duplex Relay System With Wireless Energy Harvesting

作　　者：吴奇 刘菁华[1] 赵睿[1,2] 聂志巧 李元健 WU Qi;LIU Jinghua;ZHAO Rui;NIE Zhiqiao;LI Yuanjian(College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China;Xiamen Key Laboratory of Mobile Multimedia Communications, Huaqiao University, Xiamen 361021, China)

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021 [2]华侨大学厦门市移动多媒体重点实验室,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2019年第3期390-398,共9页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(61401165);福建省自然科学基金资助项目(2015J01262);华侨大学研究生科研创新能力培育计划资助项目(1611301040)

摘　　要：为提升基于无线能量采集技术的全双工中继安全网络系统的安全性能,提出全双工中继干扰窃听者的策略.为干扰窃听者窃听有用信息,在第一时隙,中继发送人工噪声干扰窃听者;在第二时隙,中继在转发有用信息的同时,信源发送人工噪声干扰窃听者.在瑞利衰落信道下,通过合理的近似分析,推导出遍历可达安全速率(EASR)的表达式.分析与仿真结果表明:理论分析曲线与蒙特卡洛仿真结果基本吻合;对模型进行不同参数的性能对比,显示出所提系统在不同情况下具有性能优越性.A full-duplex relay secure transmission model is investigated based on wireless energy harvesting technology. In order to improve the security performance of the system, a strategy of interfering eavesdroppers with full-duplex relay nodes is proposed. In order to preventing eavesdrop useful information for eavesdroppers, in the first time slot, the relay sends artificial noise to disturb the eavesdropper. In the second time slot, the relay sends useful information while the source sends artificial noise to disturb the eavesdropper. Under the rayleigh fading channel, an expression of ergodic achievable secrecy rate(EASR) is deduced through reasonable approximate analysis. The analysis and simulation results show that the theoretical analysis curves are in good agreement with the Monte Carlo simulation results, and the performance comparison of the model under different parameter settings shows the performance superiority of the strategy in different situations.

关 键 词：物理层安全 能量采集 协作通信 马尔科夫链 遍历可达安全速率 

分 类 号：TN92[电子电信—通信与信息系统]