Low complexity joint user and mode selection algorithm for multiuser mimo downlink systems

Jin Sung Kim, Kyoung Jae Lee, Inkyu Lee

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

    2 Citations (Scopus)

    Abstract

    In multiuser multiple-input multiple-output (MIMO) downlink systems, orthogonal space division multiplexing (OSDM) techniques have been studied to approach the optimum performance of dirty paper coding with low complexity. Assuming a large number of users in the multiuser system, a proper user scheduling is needed to utilize the OSDM. In addition, the performance of the chosen users can be maximized by properly configuring the numbers of data streams, or the transmission modes. In this paper, we propose a joint user and mode selection algorithm which approaches the performance of the exhaustive search with significantly lower complexity. To this end we first decompose the sum rate into the sum of the individual rates, and derive an upper bound of each individual rate. By utilizing the obtained upper bound, the user and mode subset is determined to maximize the sum rate. Comparing with other conventional low-complexity schemes, the proposed scheme requires much lower complexity especially when the number of users is large. For example, our method achieves a complexity reduction of 92% compared to the conventional scheme when the number of users is 25. Simulation results show that our method achieves more than 95% of the sum rate of the exhaustive search.

    Original languageEnglish
    Title of host publication2010 IEEE Global Telecommunications Conference, GLOBECOM 2010
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Print)9781424456383
    DOIs
    Publication statusPublished - 2010
    Event53rd IEEE Global Communications Conference, GLOBECOM 2010 - Miami, FL, United States
    Duration: 2010 Dec 62010 Dec 10

    Publication series

    NameGLOBECOM - IEEE Global Telecommunications Conference

    Other

    Other53rd IEEE Global Communications Conference, GLOBECOM 2010
    Country/TerritoryUnited States
    CityMiami, FL
    Period10/12/610/12/10

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Fingerprint

    Dive into the research topics of 'Low complexity joint user and mode selection algorithm for multiuser mimo downlink systems'. Together they form a unique fingerprint.

    Cite this