解码转发中继选择系统的安全性能分析

发布时间：2018-06-10 20:47

本文选题：物理层安全 + 解码转发　；参考：《中国科学:信息科学》2017年09期

【摘要】：本文研究源节点与中继节点发送的信号均能被窃听时,多中继自适应解码转发(decode-andforward,DF)系统的安全性能.根据信道状态信息是否可知,分析最优中继选择(optimal relay selection,ORS)、传统中继选择(conventional relay selection,CRS)和多中继选择(multiple relays selection,MRS)3种方案的安全性能,推导出3种方案安全中断概率的解析表达式.通过渐进性能分析,得到了3种方案的安全分集增益和安全分集阶数.仿真结果验证了理论研究的正确性,并分析得到不同参数对系统安全性能的影响.结果表明多中继场景中,ORS方案对系统的安全性能提升最为明显,3种方案的安全分集阶数相同且均与中继个数有关,窃听信道参数只对系统安全分集增益有影响.最后,给出了系统最佳功率分配方法.
[Abstract]:In this paper, we study the security performance of multi-relay adaptive decoding and forwarding decode and forward forwarding (DFF) system when the signals sent by both source and relay nodes can be eavesdropped. According to the channel state information, this paper analyzes the security performance of the optimal relay selection scheme, the conventional relay selection scheme and the multiple relay selection scheme, and derives the analytical expressions of the security interruption probability of the three schemes. Through the asymptotic performance analysis, the security diversity gain and the security diversity order of the three schemes are obtained. The simulation results verify the correctness of the theoretical research and analyze the influence of different parameters on the security performance of the system. The results show that the security diversity order of the three schemes are the same and all are related to the number of relays in the multi-relay scenario. The eavesdropping channel parameters only affect the security diversity gain of the system. Finally, the optimal power allocation method is given.
【作者单位】：重庆邮电大学移动通信技术重庆市重点实验室;西南大学非线性电路与智能信息处理重庆市重点实验室;
【基金】：国家自然科学基金(批准号:61471076,61401372) 重庆市教委科学技术研究项目(批准号:KJ1600413) 重庆市基础科学与前沿技术研究项目(批准号:cstc2017jcyjAX0204)资助
【分类号】：TN918

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