University of Hertfordshire

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Impact of Phase-Noise and Spatial Correlation on Double-RIS-Assisted Multiuser MISO Networks

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Original languageEnglish
Pages (from-to)1473-1477
Number of pages5
JournalIEEE Wireless Communications Letters
Volume11
Issue7
DOIs
Publication statusPublished - 17 May 2022

Abstract

We study the performance of a phase-noise impaired double reconfigurable intelligent surface (RIS)-aided multiuser (MU) multiple-input single-output (MISO) system under spatial correlation at both RISs and base-station (BS). The downlink achievable rate is derived in closed-form under maximum ratio transmission (MRT) precoding. In addition, we obtain the optimal phase-shift design at both RISs in closed-form for the considered channel and phase-noise models. Numerical results validate the analytical expressions, and highlight the effects of different system parameters on the achievable rate. Our analysis shows that phase-noise can severely degrade the performance when users do not have direct links to both RISs, and can only be served via the double-reflection link. Also, we show that high spatial correlation at RISs is essential for high achievable rates.

Notes

© 2012 IEEE. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/

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