On the physical layer security for land mobile satellite systems

Abstract

Land mobile satellite (LMS) systems have become prominent in the fifth-generation broadband wireless communications by providing high quality-of-services to terrestrial mobile users at low cost. However, with the increasing smart technologies, wiretapping and security threats are becoming a major concern in such systems. In this paper, we investigate the secrecy performance of a downlink LMS system by employing a friendly jammer in the presence of an eavesdropper on the ground. Specifically, we derive the secrecy outage probability (SOP) and the probability of strictly positive secrecy capacity (SPSC) expressions of the considered LMS system under the pertinent heterogeneous fading models for the satellite channels and terrestrial jamming channels. We validate our analytical hypothesis through simulations and reveal the impact of jamming and key parameters on the secrecy performance of LMS systems. © Springer Nature Singapore Pte Ltd 2020.