A rate-splitting strategy for max-min fair multigroup multicasting

Hamdi Joudeh, Bruno Clerckx

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    26 Citations (Scopus)

    Abstract

    We consider the problem of transmit beamforming to multiple cochannel multicast groups. The conventional approach is to beamform a designated data stream to each group, while treating potential inter-group interference as noise at the receivers. In overloaded systems where the number of transmit antennas is insufficient to perform interference nulling, we show that inter-group interference dominates at high SNRs, leading to a saturating max-min fair performance. We propose a rather unconventional approach to cope with this issue based on the concept of Rate-Splitting (RS). In particular, part of the interference is broadcasted to all groups such that it is decoded and canceled before the designated beams are decoded. We show that the RS strategy achieves significant performance gains over the conventional multigroup multicast beamforming strategy.

    Original languageEnglish
    Title of host publicationSPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781509017492
    DOIs
    Publication statusPublished - 2016 Aug 9
    Event17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016 - Edinburgh, United Kingdom
    Duration: 2016 Jul 32016 Jul 6

    Publication series

    NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
    Volume2016-August

    Other

    Other17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016
    Country/TerritoryUnited Kingdom
    CityEdinburgh
    Period16/7/316/7/6

    Bibliographical note

    Funding Information:
    This work has been partially supported by the UK EPSRC under grant number EP/N015312/1.

    Publisher Copyright:
    © 2016 IEEE.

    Keywords

    • Broadcasting
    • WMMSE approach
    • degrees of freedom
    • downlink beamforming
    • multicasting

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Computer Science Applications
    • Information Systems

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