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    Multiuser Uplink MIMO Communications Assisted by Multiple Reconfigurable Intelligent Surfaces

    88752.pdf (639.0Kb)
    Access Status
    Open access
    Authors
    Lv, Y.
    He, Z.
    Rong, Yue
    Date
    2021
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lv, Y. and He, Z. and Rong, Y. 2021. Multiuser Uplink MIMO Communications Assisted by Multiple Reconfigurable Intelligent Surfaces. IEEE Communications Letters. 25 (12): pp. 3975-3979.
    Source Title
    IEEE Communications Letters
    DOI
    10.1109/LCOMM.2021.3117568
    ISSN
    1089-7798
    Faculty
    Faculty of Science and Engineering
    School
    School of Elec Eng, Comp and Math Sci (EECMS)
    Remarks

    © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

    URI
    http://hdl.handle.net/20.500.11937/88928
    Collection
    • Curtin Research Publications
    Abstract

    This letter focuses on the design of multiuser uplink multiple-input multiple-output (MIMO) communications assisted by multiple reconfigurable intelligent surfaces (RISs), where we consider both linear minimal mean-squared error (MMSE) and nonlinear MMSE-decision feedback equalization (DFE) receivers. The RISs, consisting of massive low-cost passive elements, can reflect the incident signals with either continuous or discrete phase shifts. Adopting the sum mean-squared error (MSE) minimization criterion, we jointly optimize the RIS phase shifts, the linear or nonlinear receiving matrices, and the source precoding matrices in iterative manner. Simulation results show that, when the signals in direct user-access point (AP) links suffer severe attenuation, the introduction of indirect user-RIS-AP links can significantly improve the system performance.

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