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    A low-complexity zero-forcing beamformer design for multiuser MIMO systems via a dual gradient method

    Access Status
    Open access via publisher
    Authors
    Li, Bin
    Dam, Hai Huyen Heidi
    Cantoni, A.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, B. and Dam, H.H.H. and Cantoni, A. 2016. A low-complexity zero-forcing beamformer design for multiuser MIMO systems via a dual gradient method. Numerical Algebra, Control and Optimization. 6 (3): pp. 297-304.
    Source Title
    Numerical Algebra, Control and Optimization
    DOI
    10.3934/naco.2016012
    ISSN
    2155-3289
    School
    Department of Mathematics and Statistics
    URI
    http://hdl.handle.net/20.500.11937/52104
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 American Institute of Mathematical Sciences. All rights reserved.In this paper, we consider the zero-forcing beamforming (ZFBF) under the per-antenna power constraints (PAPC). Our objective is to maximize the minimum user information rate. Traditionally, ZFBF under PAPC with a max-min performance measure can be transformed into a second order cone problem and then solved by applying the interior point method. However, it is expensive to realize this design in practice due to high computational com-plexity per iteration. An alternative low complexity zero-forcing beamformer design is proposed for MU-MIMO systems by applying a dual gradient method. Different from the step size rule in the literature, a backtracking line search is adopted. A numerical example is provided to show the effectiveness of the proposed method.

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