王小旗, 侯争, 张捍卫,等.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）,doi:10.16186/j.cnki.1673-9787.2022030036

WANG X Q, HOU Z, ZHANG H W, ,et al. Physical layer secrecy analysis of multi-satellite hybrid satellite-terrestrial relay networks[J].Journal of Henan Polytechnic University(Natural Science) ,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（网络首发）

王小旗1, 侯争2, 张捍卫3, 施闯4

1.河南理工大学 物理与电子信息学院，河南 焦作 454000;2.河南理工大学 测绘与国土信息工程学院，河南 焦作 454000;3.河南理工大学资源环境学院，河南 焦作 454000;4.北京航空航天大学，北京 100191

摘要:针对侦察、预警、资源、地形测绘等卫星信息传输安全问题，构建多卫星星地混合协作网（hybrid satellite-terrestrial relay networks， HSTRN），中继采用放大转发协议（amplify—and-forward， AF）或译码转发协议 （decode-and-forward， DF），卫星链路服从阴影莱斯（Shadowed-Rician）分布，地面链路和窃听链路服从瑞利 （Rayleigh）分布，推导系统安全中断概率的理论表达式，得到高信噪比条件下安全中断概率的近似表达和系统吞吐量。结果表明，卫星个数、安全速率阈值、信道衰落程度等参数对AF和DF中继HSTRN的安全性能 具有重要影响。该研究运用计算机仿真试验验证了理论分析的准确性，可为卫星通信物理层安全性能的后续研究提供参考。

关键词:星地混合协作网;多卫星;阴影莱斯衰落;安全中断概率

中图分类号: TN927

doi:10.16186/j.cnki.1673-9787.2022030036

基金项目:国家自然科学基金资助项目(42074002； 41931075)； 河南省科技攻关项目(212102310436)； 河南省高等学校重点科研项目(22A420005)； 河南省高校基本科研业务费专项项目(NSFRF210329)； 河南理工大学博士基金资助项目(B2021-18)

收稿日期:2022-03-15

修回日期:2022-05-16

网络首发日期:2022-11-14

 Physical layer secrecy analysis of multi-satellite hybrid satellite-terrestrial relay networks(Online)

WANG Xiaoqi1, HOU Zheng2, ZHANG Hanwei3, SHI Chuang4

1.School of Physics & Electronic Information Engineering， Henan Polytechnic University， Jiaozuo  454000， Henan， China;2.School of Surveying and Land；Information Engineering， Henan Polytechnic University， Jiaozuo  454000， Henan， China;3.Institute of Resources & Environment， Henan Polytechnic University，Jiaozuo  454000， Henan， China;4.Beihang University， Beijing  100191， China

Abstract:Aiming at the information transmission security of reconnaissance, early warning, resource, topographic mapping and space target monitoring satellites, the physical layer secrecy performance of a multi-satellite hybrid satellite-terrestrial relay network (HSTRN) is investigated in this paper, where multiple satellite sources aim to communicate with a destination user via a relay, in the existence of an eavesdropper. The relay is adopted using either amplify-and-forward (AF) or decode-and-forward (DF) protocol to assist the transmission. To take full advantage of the satellite and relay, Shadowed-Rician fading is considered for satellite links while Rayleigh fading is considered for both terrestrial link and eavesdropper link. To evaluate the secrecy performance of the considered network, the accurate analytical expression for the secrecy outage probability (SOP) is derived. In order to get further insights on the achievable diversity order of the system, the asymptotic behavior of SOP expression at high signal-to-noise ratio (SNR) regime is deduced. The throughput of the system is also discussed to evaluate the secrecy performance of the network. Finally, the theoretical results are validated through comparison with simulations and show: (1) The secrecy performance of the considered network gets better with the increase of the satellite number, and with the decreasing severity of the channel fading scenario. (2) The secrecy performances of AF and DF relaying system are different at medium and low SNR regions, while they will get increasingly consistent at high SNR region. (3) The improvement of the channel fading scenario and high SNR can yield to high throughput of the system.

Key words:hybrid satellite-terrestrial relay network;multi-satellite;Shadowed-Rician fading;secrecy outage probability

CLC: TN927