Hybrid precoding for physical layer multicasting

Mingbo Dai, Bruno Clerckx

    Research output: Contribution to journalArticlepeer-review

    27 Citations (Scopus)

    Abstract

    This work investigates the problem of downlink transmit precoding for physical layer multicasting with a limited number of radio-frequency (RF) chains. To tackle the RF hardware constraint, we consider a hybrid precoder that is partitioned into a high-dimensional RF precoder and a low-dimensional baseband precoder. Considering a total transmit power constraint over the RF chains, the goal is to maximize the minimum (max- min) received signal-to-noise ratio (SNR) among all users. We propose a low complexity algorithm to compute the RF precoder that achieves near-optimal max-min performance. Moreover, we derive a simple condition under which the hybrid precoding driven by a limited number of RF chains incurs no loss of optimality with respect to the fully digital precoding case. Finally, numerical results validate the effectiveness of the proposed algorithm and theoretical findings.

    Original languageEnglish
    Article number2503273
    Pages (from-to)228-231
    Number of pages4
    JournalIEEE Communications Letters
    Volume20
    Issue number2
    DOIs
    Publication statusPublished - 2016 Feb 1

    Bibliographical note

    Publisher Copyright:
    © 2015 IEEE.

    Keywords

    • Hybrid precoding
    • Limited RF chains
    • Low complexity algorithm
    • Multicasting

    ASJC Scopus subject areas

    • Modelling and Simulation
    • Computer Science Applications
    • Electrical and Electronic Engineering

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