协作干扰下的非可信中继与全双工目的节点系统的遍历安全容量分析  

Ergodic Secrecy Capacity of Untrusted Relay and Full Duplex Destination Systems with Cooperative Jamming

作　　者：谭星[1] 赵睿[1] 王聪[1] 袁毅[1] 

机构地区：[1]华侨大学厦门市移动多媒体通信实验室,福建厦门361021

出　　处：《信号处理》2017年第5期732-740,共9页Journal of Signal Processing

基　　金：国家自然科学基金(61401165;61362018;61302095);福建省自然科学基金(2015J01262;2014J01243);华侨大学中青年教师科研提升资助计划(ZQN-PY407);华侨大学研究生科研创新能力培育计划资助项目(1511301034)

摘　　要：研究了一种非可信放大转发中继与全双工目的节点相结合的传输模型。为提升系统安全性能,提出了全双工目的节点干扰(full duplex-destination based jamming,FD-DBJ)策略。同时结合半双工目的节点干扰策略以及放大转发中继策略对比分析系统安全性能。在瑞利衰落信道下,通过合理的近似分析推导出三种策略遍历安全容量的近似闭合表达式。分析与仿真结果显示,在高信噪比下,理论分析曲线与蒙特卡洛仿真结果基本吻合,并对三种策略的性能进行对比,凸显出FD-DBJ策略的性能优越性。并分析了FD-DBJ传输策略的最优功率分配因子。A transmission model is investigated by combining the untrusted amplify-and-forward relay with full-duplex desti- nation. To improve the secrecy performance of the system, the full duplex destination based jamming （FD-DBJ） scheme is proposed. The traditional half duplex DBJ scheme and the amplify-and-forward relaying scheme are compared with the pro- posed one to analyze the system performance. Through the reasonable analysis, the approximate closed-form solutions are de- rived for three strategies in the Rayleigh fading channel. Analyses and simulation results show that, in the high SNR regime, the analytical curves match well with the simulation results, and the advantage of FD-DBJ is also revealed through the per- formance comparison of three strategies. The optimal power allocation factor is analyzed for the FD-DBJ transmission strategy.

关 键 词：物理层安全 协同通信 目的端干扰 遍历安全容量 天线选择 

分 类 号：TN92[电子电信—通信与信息系统]