Bit allocation and pairing methods for distributed antenna systems with limited feedback

Hoon Lee, Eunsung Park, Haewook Park, Inkyu Lee

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

    Abstract

    In this paper, we study bit allocation and pairing methods based on zero forcing beamforming for downlink multiuser distributed antenna systems with limited feedback. Before assigning the feedback bit for each distributed antenna (DA) port, we need to solve the pairing issue which determines the set of DA ports to support a user. To this end, we first analyze an upper bound of a mean rate loss between perfect channel state information systems and limited feedback systems. Since minimizing the obtained bound is a joint optimization problem with respect to the pairing and the bit allocation, it is difficult to identify a solution analytically. Instead, we propose a two-step algorithm which derives the pairing based on the bound of the rate loss, and then obtain the feedback bit allocation method independently. From simulation results, we confirm that the proposed algorithms offer about 135% performance gains over a conventional equal bit allocation scheme for 5 DA ports systems. andcopy; 2014 IEEE.

    Original languageEnglish
    Title of host publication2014 IEEE 80th Vehicular Technology Conference, VTC2014-Fall, Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781479944491, 9781479944491
    DOIs
    Publication statusPublished - 2014 Nov 24
    Event80th IEEE Vehicular Technology Conference, VTC 2014-Fall - Vancouver, Canada
    Duration: 2014 Sept 142014 Sept 17

    Publication series

    NameIEEE Vehicular Technology Conference
    ISSN (Print)1550-2252

    Conference

    Conference80th IEEE Vehicular Technology Conference, VTC 2014-Fall
    Country/TerritoryCanada
    CityVancouver
    Period14/9/1414/9/17

    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics

    Fingerprint

    Dive into the research topics of 'Bit allocation and pairing methods for distributed antenna systems with limited feedback'. Together they form a unique fingerprint.

    Cite this