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RIS-aided secure massive MIMO with hardware imperfections

Published on:

8 April 2024

Primary Category:

Information Theory

Paper Authors:

Dan Yang,

Jindan Xu,

Wei Xu,

Bin Sheng,

Xiaohu You,

Chau Yuen,

Marco Di Renzo

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Key Details

Proposes RIS integration into secure massive MIMO system under hardware/channel imperfections

Derives ergodic secrecy rate expressions considering transceiver/RIS hardware impairments

Shows transmit power can scale as 1/N with RIS elements N and sustain positive secrecy

Secrecy rate grows logarithmically with base station antennas M

More RIS elements can counteract secrecy rate loss from hardware impairments

AI generated summary

RIS-aided secure massive MIMO with hardware imperfections

This paper analyzes the integration of a reconfigurable intelligent surface (RIS) into a secure multi-user massive MIMO system under hardware impairments, imperfect channel state information, and spatial correlation. A linear minimum mean square error channel estimation method considers transceiver hardware impairments and RIS phase errors. Analytical expressions for the achievable ergodic secrecy rate with artificial noise at the base station are derived. To mitigate hardware impairments, an optimal power allocation between signals and artificial noise is presented. Key results show that positive secrecy rates are maintained if transmit power scales as 1/N with number of RIS elements N, and secrecy rate grows logarithmically with base station antennas M. More RIS elements can counteract secrecy rate losses from hardware impairments.

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