This paper investigates the downlink of massive multiple-input multiple-output (MIMO) systems that include a single cell Base Station (BS) equipped with large number of antennas serving multiple users. As the number of RF chains is getting large, the system model considered in this paper assumes a non negligible circuit power consumption. Hence, the aim of this work is to find the optimal balance between the power consumed by the RF chains and the transmitted power. First, assuming an equal power allocation among users, the optimal number of RF chains to be activated is analytically found. Then, for a given number of RF chains we derive analytically the optimal power allocation among users. Based on these analysis, we propose an iterative algorithm that computes jointly the optimal number of RF chains and the optimal power allocation vector. Simulations validate the analytical results and show the high performance provided by the proposed algorithm.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Joint Optimal Number of RF Chains and Power Allocation for Downlink Massive MIMO Systems


    Contributors:
    Hamdi, Rami (author) / Ajib, Wessam (author)


    Publication date :

    2015-09-01


    Size :

    301547 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Optimal Energy-Efficient Resource Allocation for Massive MIMO FDD Downlink System

    Wang, Yi / Song, Wenting / Li, Chunguo et al. | IEEE | 2015



    Phase-Only OFDM Communication for Downlink Massive MIMO Systems

    Wiffen, Fred / Bocus, Mohammud Z. / Doufexi, Angela et al. | IEEE | 2018



    Joint Subcarrier Assignment and Power Allocation in Downlink SCMA Systems

    Zhu, Wenfeng / Qiu, Ling / Chen, Zheng | IEEE | 2017