Robust Secure Transmission for Satellite Communications | IEEE Journals & Magazine | IEEE Xplore

Robust Secure Transmission for Satellite Communications


Abstract:

In recent years, satellite communications have become the focus of research on space–air–ground–sea integrated wireless communication networks because of their wide cover...Show More

Abstract:

In recent years, satellite communications have become the focus of research on space–air–ground–sea integrated wireless communication networks because of their wide coverage. Due to the broadcasting nature of satellite communications, the security of satellite systems has become a critical issue. In this article, we study the secure transmission of satellite communications, focusing on the geostationary earth orbit (GEO) and low earth orbit (LEO) satellite scenarios, respectively. Because of the satellite's high mobility and long propagation delays, the transmitter side cannot obtain accurate channel state information (CSI). To this end, we establish the channel phase uncertainty model of GEO satellite users, the channel angle uncertainty model of LEO satellite users, and the norm-bounded model of eavesdroppers, respectively. Then, a corresponding robust secure transmission design is proposed. Since the resulting optimization problems are nonconvex and challenging to handle, we propose an algorithm that transforms the original problem into a series of convex optimization subproblems and obtains the beamforming weight vectors through iterative calculation. Simulation results indicate that the security and robustness performance of the proposed algorithms are significantly improved compared with the conventional baselines.
Published in: IEEE Transactions on Aerospace and Electronic Systems ( Volume: 59, Issue: 2, April 2023)
Page(s): 1598 - 1612
Date of Publication: 31 August 2022

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I. Introduction

In recent years, the space–air–ground–sea integrated wireless communication network supporting seamless, high-speed, and reliable transmission has attracted extensive attentions [1], [2]. Satellite communications have the superiority of wide-range coverage and can realize the global interconnection, thus becoming one of the hot spots in integrated network researches. The geostationary earth orbit (GEO) and low earth orbit (LEO) satellites are the main focuses of satellite communication researches. The GEO satellites with the multibeam architecture have spectrum multiplexing capabilities and high data transmission rates. They have been widely applied in civil and military fields, such as navigation, disaster relief, rescue, broadcasting, etc. [3], [4]. The LEO satellites have also gained significant attentions because of their relatively smaller path loss, less delay, and lower production costs than GEO ones [5], [6].

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