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

Abstract

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

CLC Number:

TN927.2

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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References 16

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Analysis of physical layer security performance for satellite communication systems

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