重庆邮电大学学报（自然科学版）2016，Vol.28Issue(5)：648-657,10.DOI:10.3979/j.issn.1673-825X.2016.05.007
单窃听双跳协作网络的中继选择方案及其性能分析
Relay selection schemes for dual-hop cooperative networks with an eavesdropper and their performance analysis
摘要
Abstract
The problem of relay selection for one-way decode-and-forward(DF)cooperative wireless networks with secrecy constraints is investigated.In this paper,we propose three relay selection schemes to improve physical layer security a-gainst the eavesdropper who can eavesdrop on both the source and the relays.The first scheme chooses the relay having the lowest instantaneous signal-to-noise ratio(SNR)to the eavesdropper.The second one is the max-min approach,which opts the relay has the best worse end-to-end SNR of the relays and destination.The third scheme assumes the instantaneous channel state information(CSI)of the wiretap channels and the legitimate channels,and maximizes the achievable secrecy rate.Afterwards,the closed-form expressions of intercept probability for the proposed selection schemes were derived.Fur-thermore,we carry out an asymptotic analysis of intercept probability to evaluate the diversity order performance of the pro-posed relay selection schemes.Specifically,the diversity order of the first scheme is 1 ,and other two relay selection schemes achieve the diversity order M,where Mis the number of relays.Finally,numerical results are provided to corrobo-rate the analytical results.关键词
中继选择/物理层安全性/译码转发/拦截概率/分集阶数Key words
relay selection/physical-layer security/decode and forward/intercept probability/diversity order分类
信息技术与安全科学引用本文复制引用
阳俐君,曹张华,张士兵,吉晓东..单窃听双跳协作网络的中继选择方案及其性能分析[J].重庆邮电大学学报（自然科学版）,2016,28(5):648-657,10.基金项目
国家自然科学基金（61371111，61371112，61371113，61401238，61401241）；江苏省自然科学基金（BK20140433）；南通市科技计划资助 （）
