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    A global optimal zero-forcing beamformer design with signed power-of-two coefficients

    Access Status
    Open access via publisher
    Authors
    Li, Bin
    Dam, Hai Huyen Heidi
    Cantoni, A.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Li, B. and Dam, H.H.H. and Cantoni, A. 2015. A global optimal zero-forcing beamformer design with signed power-of-two coefficients. Journal of Industrial and Management Optimization. 12 (2): pp. 595-607.
    Source Title
    Journal of Industrial and Management Optimization
    DOI
    10.3934/jimo.2016.12.595
    ISSN
    1547-5816
    School
    Department of Mathematics and Statistics
    URI
    http://hdl.handle.net/20.500.11937/47989
    Collection
    • Curtin Research Publications
    Abstract

    In this paper, we investigate a zero-forcing beamformer design with signed power-of-two coe cients for rural applications. In this design, the minimum user information rate is taken as the performance measure, while a practical system design constraint, the per-antenna power constraint, is imposed. The problem is formulated as a constrained zero-one integer programming problem. Based on a transform between two different integer spaces, the problem is transformed into an equivalent constrained integer programming problem. A global optimal two-stage design is proposed for solving the problem. In the first stage, a polynomial time quantization method is applied to obtain an initial design. In the second stage, an auxiliary function method is used to find the global optimal design. For illustration, numerical examples under several different scenarios are studied and the results are compared with those obtained by an existing method. Furthermore, the impact of the mutual interference terms in the performance measure is also studied.

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