Ergodic Secrecy Rate of RIS-Assisted Communication Systems in the Presence of Discrete Phase Shifts and Multiple Eavesdroppers

Peng Xu*, Gaojie Chen, Gaofeng Pan, Marco Di Renzo

*此作品的通讯作者

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摘要

This letter investigates the ergodic secrecy rate (ESR) of a reconfigurable intelligent surface (RIS)-assisted communication system in the presence multiple eavesdroppers (Eves), and by assuming discrete phase shifts at the RIS. In particular, a closed-form approximation of the ESR is derived for both non-colluding and colluding Eves. The analytical results are shown to be accurate when the number of reflecting elements of the RIS N is large. Asymptotic analysis is provided to investigate the impact of N on the ESR, and it is proved that the ESR scales with log 2 N for both non-colluding and colluding Eves. Numerical results are provided to verify the analytical results and the obtained scaling laws.

源语言英语
文章编号9291402
页(从-至)629-633
页数5
期刊IEEE Wireless Communications Letters
10
3
DOI
出版状态已出版 - 3月 2021

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Xu, P., Chen, G., Pan, G., & Renzo, M. D. (2021). Ergodic Secrecy Rate of RIS-Assisted Communication Systems in the Presence of Discrete Phase Shifts and Multiple Eavesdroppers. IEEE Wireless Communications Letters, 10(3), 629-633. 文章 9291402. https://doi.org/10.1109/LWC.2020.3044178