Imperfect and unmatched CSIT is still useful for the frequency correlated MISO broadcast channel

Chenxi Hao, Bruno Clerckx

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

    13 Citations (Scopus)

    Abstract

    Since Maddah-Ali and Tse showed that the completely stale transmitter-side channel state information (CSIT) still benefits the Degrees of Freedom (DoF) of the Multiple-Input-Multiple-Output (MISO) Broadcast Channel (BC), there has been much interest in the academic literature to investigate the impact of imperfect CSIT on DoF region of time correlated broadcast channel. Even though the research focus has been on time correlated channels so far, a similar but different problem concerns the frequency correlated channels. Indeed, the imperfect CSIT also impacts the DoF region of frequency correlated channels, as exemplified by current multi-carrier wireless systems. This contribution, for the first time in the literature, investigates a general frequency correlated setting where a two-antenna transmitter has imperfect knowledge of CSI of two single-antenna users on two adjacent subbands. A new scheme is derived as an integration of Zero-Forcing Beamforming (ZFBF) and the scheme proposed by Maddah-Ali and Tse. The achievable DoF region resulted by this scheme is expressed as a function of the qualities of CSIT. 1

    Original languageEnglish
    Title of host publication2013 IEEE International Conference on Communications, ICC 2013
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages3181-3186
    Number of pages6
    ISBN (Print)9781467331227
    DOIs
    Publication statusPublished - 2013
    Event2013 IEEE International Conference on Communications, ICC 2013 - Budapest, Hungary
    Duration: 2013 Jun 92013 Jun 13

    Publication series

    NameIEEE International Conference on Communications
    ISSN (Print)1550-3607

    Other

    Other2013 IEEE International Conference on Communications, ICC 2013
    Country/TerritoryHungary
    CityBudapest
    Period13/6/913/6/13

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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