期刊
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
卷 16, 期 -, 页码 1670-1680出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIFS.2020.3040884
关键词
Satellite antennas; Array signal processing; Precoding; Satellite broadcasting; Physical layer security; Downlink; Throughput; Anti-eavesdropping; multiuser MIMO; physical layer security; precoding; satellite communications
In satellite communication downlinks, a precoding algorithm is proposed in this paper to secure the data of multiple users and optimize the minimum secrecy capacity. By introducing artificial noise, a positive secrecy effect is achieved, even if the number of eavesdroppers exceeds the number of beams. Multiple-reflector antenna design shows higher secrecy and throughput performance compared to single-reflector design.
In satellite communication downlinks, physical layer security is challenging to achieve due to their broadcasting nature and Line-of-Sight channel characteristics. This paper provides a precoding algorithm to secure the downlinks of multiple users against multiple eavesdroppers with optimization of the minimum secrecy capacity. By the use of artificial noise, a positive secrecy capacity is achievable even if the number of eavesdroppers is higher than the number of beams. We demonstrate that a multiple-reflector antenna design provides a significantly higher secrecy and throughput performance when compared to a single-reflector design due to additional degrees of freedom, exhibited by the signal phases. The total vulnerability region is introduced as a new figure of merit with respect to unidentified eavesdroppers.
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