卫星通信系统的物理层安全性能分析

doi:10.19665/j.issn1001-2400.2021.03.021

西安电子科技大学学报 ›› 2021, Vol. 48 ›› Issue (3): 163-169.doi: 10.19665/j.issn1001-2400.2021.03.021

卫星通信系统的物理层安全性能分析

肖叶秋¹(),祝幸辉¹(),赵双睿¹(),任保全²(),沈玉龙¹()

1.西安电子科技大学计算机科学与技术学院,陕西西安 710071
2.军事科学院系统工程研究院,北京 100141

收稿日期:2021-03-08 出版日期:2021-06-20 发布日期:2021-07-05
作者简介:肖叶秋(1990—),女,西安电子科技大学博士研究生,E-mail:yqxiao@stu.xidian.edu.cn|祝幸辉(1990—),男,西安电子科技大学博士研究生,E-mail:xhzhu@stu.xidian.edu.cn|赵双睿(1995—),男,西安电子科技大学博士研究生,E-mail:srzhao@stu.xidian.edu.cn|任保全(1974—),男,高级工程师,博士,E-mail:renbq88@126.com|沈玉龙(1978—),男,教授,博士,E-mail:ylshen@mail.xidian.edu.cn
基金资助:
国家自然科学基金(61941114);国家自然科学基金(61972308);国家重点研发计划(2018YFB2100403)

Analysis of physical layer security performance for satellite communication systems

XIAO Yeqiu¹(),ZHU Xinghui¹(),ZHAO Shuangrui¹(),REN Baoquan²(),SHEN Yulong¹()

1. School of Computer Science and Technology,Xidian University,Xi’an 710071,China
2. Institute of Systems Engineering,Academy of Military Science,Beijing 100141,China

Received:2021-03-08 Online:2021-06-20 Published:2021-07-05

摘要/Abstract

摘要：

由于全球卫星通信系统信道完全开放、天地一体化组网等,导致其通信安全保障面临严峻挑战。而物理层内生的安全机制能够保障卫星通信安全,有效地防止信道窃听。结合天地一体化组网,构建了同时存在地面窃听基站和窃听卫星场景的卫星通信系统安全性能分析框架。基于瑞利衰落信道和Shadowed-Rician衰落信道,分别建立了两类窃听者的窃听模型;考虑窃听者采用不共谋策略和共谋策略,分别推导出了两种窃听策略下该系统的平均安全容量和安全中断概率的解析表达式,以评估系统的物理层安全性能。仿真结果表明,提高发射功率能够保证在安全中断概率不变的情况下有效地提高系统的安全容量。与地面窃听基站相比,降低窃听卫星处的信噪比能够更显著地提高系统的安全性能。

关键词: 卫星通信, 物理层安全, 平均安全容量, 安全中断概率

Abstract:

Due to the openness of the wireless medium and construction of the space-ground integrated information network,satellite communication (SATCOM) systems are facing severe security challenges.Physical layer security technology can guarantee secure satellite communication and effectively prevent the channel from being eavesdropped.By taking into account the space-ground integrated information network,a security performance analysis framework is developed for the SATCOM system with the existence of a ground eavesdropper and a satellite eavesdropper.Based on the Rayleigh fading channel and Shadowed-Rician fading channel,eavesdropping models of two eavesdroppers are provided,respectively.Regarding the non-collusion and collusion strategies employed at eavesdroppers,the exact expressions for average secrecy capacity (ASC) and secrecy outage probability (SOP) are derived under the two strategies,respectively.Simulation results show that a growing transmit power can improve ASC with SOP unchanged at the same time.Reducing the signal noise ratio at the satellite eavesdropper can provide a better secrecy performance for the SATCOM system than decreasing the signal noise ratio at the ground eavesdropper.

Key words: satellite communication, physical layer security, average secrecy capacity, secrecy outage probability

中图分类号:

TN927.2

肖叶秋,祝幸辉,赵双睿,任保全,沈玉龙. 卫星通信系统的物理层安全性能分析[J]. 西安电子科技大学学报, 2021, 48(3): 163-169.

XIAO Yeqiu,ZHU Xinghui,ZHAO Shuangrui,REN Baoquan,SHEN Yulong. Analysis of physical layer security performance for satellite communication systems[J]. Journal of Xidian University, 2021, 48(3): 163-169.

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卫星通信系统的物理层安全性能分析

Analysis of physical layer security performance for satellite communication systems

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