We consider the problem of max-min fairness for uplink cell-free massive multiple-input multiple-output which is a potential technology for beyond 5G networks. More specifically, we aim to maximize the minimum spectral efficiency of all users subject to the per-user power constraint, assuming linear receive combining technique at access points. The considered problem can be further divided into two subproblems: the receiver filter coefficient design and the power control problem. While the receiver coefficient design turns out to be a generalized eigenvalue problem and thus admits a closed-form solution, the power control problem is numerically troublesome. To solve the power control problem, existing approaches rely on geometric programming (GP) which is not suitable for large-scale systems. To overcome the high-complexity issue of the GP method, we first reformulate the power control problem into a convex program, and then apply a smoothing technique in combination with an accelerated projected gradient method to solve it. The simulation results demonstrate that the proposed solution can achieve almost the same objective but in much lesser time than the existing GP-based method.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    A Low-Complexity Approach for Max-Min Fairness in Uplink Cell-Free Massive MIMO


    Beteiligte:
    Farooq, Muhammad (Autor:in) / Ngo, Hien Quoc (Autor:in) / Nam Tran, Le (Autor:in)


    Erscheinungsdatum :

    01.04.2021


    Format / Umfang :

    2239030 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Robust Low Complexity Beamforming for Cell-Free Massive MIMO

    Li, Na / Jin, Jing / Xia, Liang et al. | IEEE | 2020


    Design of Generalized Superimposed Training for Uplink Cell-free Massive MIMO Systems

    Ge, Hanxiao / Garg, Navneet / Ratnarajah, Tharmalingam | IEEE | 2022


    Uplink Power Allocation Scheme for User-Centric Cell-free Massive MIMO Systems

    Sarker, Manobendu / Fapojuwo, Abraham O. | IEEE | 2022


    Low-Complexity Uplink Multiuser Receivers for MIMO System with Massive Hybrid Array

    Li, Hang / Wang, Thomas Q. / Huang, Xiaojing et al. | IEEE | 2017