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Impact of Phase-Noise and Spatial Correlation on Double-RIS-Assisted Multiuser MISO Networks
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, Luxembourg City, Luxembourg.
Communications and Intelligent Systems Research Group, University of Hertfordshire, Hatfield, U.K; Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, Luxembourg City, Luxembourg.
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, Luxembourg City, Luxembourg.
Interdisciplinary Center for Security, Reliability and Trust, University of Luxembourg, Luxembourg City, Luxembourg.
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2022 (English)In: IEEE Wireless Communications Letters, ISSN 2162-2337, E-ISSN 2162-2345, Vol. 11, no 7, p. 1473-1477Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE) , 2022. Vol. 11, no 7, p. 1473-1477
National Category
Signal Processing
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URN: urn:nbn:se:kth:diva-312589DOI: 10.1109/lwc.2022.3175539ISI: 000838382400037Scopus ID: 2-s2.0-85130479457OAI: oai:DiVA.org:kth-312589DiVA, id: diva2:1659443
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QC 20250702

Available from: 2022-05-19 Created: 2022-05-19 Last updated: 2025-07-02Bibliographically approved

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Ottersten, Björn

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