多关口站的卫星通信系统前向链路安全性能分析  

Secrecy Outage Performance Analysis for Satellite Communication System with Multi-Gateway

作　　者：朱丽文 许拔 廖向荣 解路瑶 顾晨伟 黄硕 Zhu Li-wen;Xu Ba;Liao Xiang-rong;Xie Lu-yao;Gu Chen-wei;Huang Shuo(College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Jiangsu Nanjing 210003;Institute of Sixty-third National University of Defense Technology,Jiangsu Nanjing 210007;Shanghai Aerospace Electronic Technology Institute,Shanghai 201109)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]国防科技大学第六十三研究所,江苏南京210007 [3]上海航天电子通讯设备研究所,上海201109

出　　处：《电子质量》2021年第1期101-105,共5页Electronics Quality

基　　金：江苏省研究生科研与实践创新计划项目(SJCX19_0238)。

摘　　要：针对卫星通信系统的前向链路,分析了基于选择合并(Selection Combining,SC)方案下的系统安全中断性能。首先,考虑路径损耗和天线增益,并假设卫星链路服从阴影莱斯(Shadowed-Rician,SR)分布的情况下,得到SC方案下系统的端到端输出信噪比(Signal-to-Noise ratio,SNR)表达式。然后,基于输出SNR表达式,推导出卫星通信系统前向链路的精确安全中断概率闭合表达式。最后,数值分析结果证明了安全性能评估的正确性,并分析了馈电链路中关口站数对卫星系统前向链路性能的影响,以及窃听者对系统性能的影响,从而为实际系统设计提供了参考和依据。This paper analyzes the secrecy outage performance of the forward link of the satellite system with selection combining(SC)scheme.First,taking the path loss and antenna gain into account,assuming the satellite links obeys to Shadowed-Rician(SR)distribution.The end-to-end signal-to-noise ratio(SNR)expression is obtained for the considered and system with SC scheme.Furthermore,based on the output SNR expression,we derived the accurate and closed-form system secrecy outage probability expression for the forward link of the satellite communication system.Finally,the numerical simulation results validate the correctness of the secrecy performance evaluation,and analyze the influence of the number of gateways on the performance for the forward link of the satellite system,as well as the influence of eavesdropper on the performance for the forward link of the satellite system,which provides a guide and basis for the design of actual system.

关 键 词：卫星通信 选择合并 阴影莱斯 安全中断概率 

分 类 号：TN927[电子电信—通信与信息系统]