河南理工大学学报（自然科学版）2024，Vol.43Issue(3)：81-90,10.DOI:10.16186/j.cnki.1673-9787.2022030036
多卫星的星地混合协作网物理层安全性能分析
Analysis of physical layer security performance of multi-satellite hybrid satellite-terrestrial relay network
摘要
Abstract
Satellite communication has shown broad application prospects in various scenarios such as recon-naissance,broadcasting,early warning,resources exploration,topographic mapping due to its advantages of high transmission quality,long transmission distance and wide coverage.Objectives To address the security problem,Methods multiple-input-multiple-output(MIMO)technology is applied to the satellite relay sys-tem,a hybrid satellite-terrestrial relay network(HSTRN)with multiple satellites is constructed,and the physical layer security performance is studied in this paper.The relay is adopted either amplify-and-forward(AF)or decode-and-forward(DF)protocol to assist the transmission.The satellite link follows shadowed-Rician distribution,while terrestrial link and eavesdropper link follows Rayleigh distribution.The the theo-retical expressions of the system security outage probability(SOP)based on AF and DF relay are derived,as well as approximate expression and the system throughput under high signal-to-noise ratio conditions,the correctness of the theoretical analysis through computer simulation experiments is also verified.Results The results showed that,the security performance of the considered network gets better with the increase of the number of the satellites,and the decrease of the severity of the channel fading scenario;the security perfor-mance of the system based on the DF relaying is better than AF at low SNR region,while they will get in-creasingly consistent at high SNR region;the improvement of the channel fading scenario and high SNR can result in high throughput of the system.Conclusions The satellite number,security rate threshold,the chan-nel fading degree and other parameters have great impact on the security performance of AF and DF HSTRN,which can provide reference for subsequent research on the security performance of satellite com-munication physical layer.关键词
星地混合协作网/多卫星/物理层安全/阴影莱斯衰落/安全中断概率Key words
hybrid satellite-terrestrial relay network/multi-satellite/physical layer security/shadowed-Rician fading/security outage probability分类
信息技术与安全科学引用本文复制引用
王小旗,侯争,张捍卫,施闯..多卫星的星地混合协作网物理层安全性能分析[J].河南理工大学学报（自然科学版）,2024,43(3):81-90,10.基金项目
国家自然科学基金资助项目(42074002,41931075) （42074002,41931075）
河南省科技攻关项目(232102321004) （232102321004）
河南省高等学校重点科研项目(22A420005) （22A420005）
河南省高校基本科研业务费专项项目(NSFRF210329) （NSFRF210329）
河南理工大学博士基金资助项目(B2021-18) （B2021-18）
