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On the Sum-Rate of RIS-Assisted MIMO Multiple-Access Channels over Spatially Correlated Rician Fading
Xu, Kaizhe1; Zhang, Jun2; Yang, Xi1; Ma, Shaodan1; Yang, Guanghua3,4
2021-12-01
Source PublicationIEEE Transactions on Communications
ISSN0090-6778
Volume69Issue:12Pages:8228-8241
Abstract

Reconfigurable intelligent surface (RIS) stands out as a promising technology by enhancing the electromagnetic wave propagation environment with its passive reflecting elements. In this paper, we focus on the ergodic sum-rate analysis and maximization of the RIS-assisted uplink multiuser multiple-input multiple-output (MIMO) multiple-access channel (MAC) under Rician fading by exploiting full statistical channel state information (CSI). The spatial correlations at the base station, the users, and the RIS are also considered. By using the replica method originated in statistical physics, the closed-form asymptotic ergodic sum-rate of the system is first derived in the large-system regime on the account of the unique channel structure of the RIS-assisted MIMO-MAC system. Then, based on the derived asymptotic ergodic sum-rate, we propose an alternating optimization (AO) algorithm to jointly design the transmit covariance matrix of users and the phase-shifting matrix of RIS with full statistical CSI. Simulation results are also demonstrated to verify the accuracy of the derived asymptotic ergodic sum-rate and the superiority of the proposed AO algorithm. The results reveal that the derived closed-form asymptotic ergodic sum-rate matches very well with the Monte Carlo results even for a small number of antennas, and the proposed AO algorithm can achieve up to 10 bps/Hz gain at high signal-to-noise (SNR) regime, which is therefore valuable for future RIS-assisted MIMO-MAC system designs.

KeywordErgodic Sum-rate Analysis Joint Optimization Multiple-access Channel Reconfigurable Intelligent Surface Replica Method
DOI10.1109/TCOMM.2021.3111022
URLView the original
Language英語English
Scopus ID2-s2.0-85114712707
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Cited Times [WOS]:10   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Science and Technology
Affiliation1.State Key Laboratory of Internet of Things for Smart City, University of Macau, Taipa, Macao
2.Jiangsu Key Laboratory of Wireless Communications, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China
3.School of Intelligent Systems Science and Engineering, Jinan University, Zhuhai, 519070, China
4.Institute of Physical Internet, Jinan University, Zhuhai, 519070, China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Xu, Kaizhe,Zhang, Jun,Yang, Xi,et al. On the Sum-Rate of RIS-Assisted MIMO Multiple-Access Channels over Spatially Correlated Rician Fading[J]. IEEE Transactions on Communications,2021,69(12):8228-8241.
APA Xu, Kaizhe,Zhang, Jun,Yang, Xi,Ma, Shaodan,&Yang, Guanghua.(2021).On the Sum-Rate of RIS-Assisted MIMO Multiple-Access Channels over Spatially Correlated Rician Fading.IEEE Transactions on Communications,69(12),8228-8241.
MLA Xu, Kaizhe,et al."On the Sum-Rate of RIS-Assisted MIMO Multiple-Access Channels over Spatially Correlated Rician Fading".IEEE Transactions on Communications 69.12(2021):8228-8241.
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