On the secrecy performance of land mobile satellite communication systems
journal contributionposted on 2018-08-14, 09:29 authored by Kang An, Tao Liang, Xiaojuan Yan, Gan Zheng
In this paper, we investigate the secrecy performance against eavesdropping of a land mobile satellite (LMS) system, where the satellite employs the spot beam technique, and both the terrestrial user and eavesdropper are equipped with multiple antennas and utilize maximal ratio combining (MRC) to receive the confidential message. Specifically, in terms of the availability of the eavesdropper’s CSI at the satellite, we consider both passive (Scenario I) and active (Scenario II) eavesdropping. For Scenario I where the eavesdropper’s channel state information (CSI) is unknown to the satellite, closed-form expressions for the probability of non-zero secrecy capacity and secrecy outage probability are derived. Furthermore, expressions for the asymptotic secrecy outage probability are also presented to reveal the secrecy diversity order and array gain of the considered system. For Scenario II where the eavesdropper’s CSI is available at the satellite, novel expressions for the exact and asymptotic average secrecy capacity are obtained. Based on a simple asymptotic formula, we can characterize the high signalto- noise ratio (SNR) slope and high SNR power offset of the LMS systems. Finally, simulations are provided to validate our theoretical analysis and show the effect of different parameters on the system performance.
The work of K. An and T. Liang was supported by the National Natural Science Foundation of China under Grant 61471392. The work of X. Yan was supported in part by the Innovation Project of Guangxi Graduate Education and in part by the Innovation Project of GUET Graduate Education under Grant 2016YJCXB05. The work of G. Zheng was supported in part by the U.K. EPSRC under Grant EP/N007840/1 and in part by the Leverhulme Trust under Grant RPG-2017-129.
- Mechanical, Electrical and Manufacturing Engineering