Keywords :
Amplify-and-forward (AF); decode-and-forward (DF); friendly jammer; imperfect channel state information (CSI); nonidentical Rayleigh; physical layer security; relay networks; Amplify-and-forward; Decode-and-forward; Friendly jammer; Imperfect channel state information; Jamming; Non-identical; Non-identical rayleigh; Physical layer security; Rayleigh; Rayleigh channel; Relay; Relay network; Security; Aerospace Engineering; Electrical and Electronic Engineering
Abstract :
[en] This article proposes and analyzes the reliability and security tradeoff for a satellite-terrestrial (SatTer) relay system. Herein, a satellite sends confidential information to multiple ground users with the help of a relay base station (BS) in the presence of multiple eavesdroppers trying to wiretap the information. In particular, a friendly jammer is deployed near the relay BS to improve secure transmissions. Moreover, the nonidentical Rayleigh fading channels and imperfect channel state information are adopted for a general system model. Then, we consider both amplify-and-forward (AF) and decode-and-forward (DF) relaying strategies to give a full picture of the benefits of each method. In this context, we derive the closed-form expressions of the outage probability and intercept probability corresponding to AF- and DF-based relaying schemes, which is a high challenge and has not been investigated before. Then, Monte-Carlo simulations are conducted to evaluate the correctness of the mathematical analysis and the effectiveness of the proposed methods. Furthermore, the security and reliability trade-off of the SatTer system and the influences of various system parameters (e.g., satellite's transmit power, channel estimation errors, relay's transmit power, fading severity parameter, the average power of light-of-sight, and satellite's multipath components) on the system performance are shown.
Funders :
Van Lang University, Vietnam
Hanoi University of Science and Technology
U.S National Science Foundation
Ministry of Education, Youth and Sports of the Czech Republic
e-INFRA CZ
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