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

Zaid Abdullah; Anastasios Papazafeiropoulos; Steven Kisseleff; Symeon Chatzinotas; Bjorn Ottersten

doi:10.1109/LWC.2022.3175539

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

Zaid Abdullah
, Anastasios Papazafeiropoulos
, Steven Kisseleff
, Symeon Chatzinotas
, Bjorn Ottersten

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

86 Downloads (Pure)

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.

Original language	English
Pages (from-to)	1473-1477
Number of pages	5
Journal	IEEE Wireless Communications Letters
Volume	11
Issue number	7
DOIs	https://doi.org/10.1109/LWC.2022.3175539
Publication status	Published - 17 May 2022

Keywords

channel correlation
multiuser communication
phase-noise
Reconfigurable intelligent surface (RIS)

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This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
Final published version, 497 KBLicence: CC BY

Cite this

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title = "Impact of Phase-Noise and Spatial Correlation on Double-RIS-Assisted Multiuser MISO Networks",

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.",

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AU - Abdullah, Zaid

AU - Papazafeiropoulos, Anastasios

AU - Kisseleff, Steven

AU - Chatzinotas, Symeon

AU - Ottersten, Bjorn

PY - 2022/5/17

Y1 - 2022/5/17

N2 - 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.

AB - 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.

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KW - multiuser communication

KW - phase-noise

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JO - IEEE Wireless Communications Letters

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

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Keywords

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