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    Design of robust broadband beamformers with minimax criterion

    Access Status
    Fulltext not available
    Authors
    Dam, Hai Huyen Heidi
    Nordholm, Sven
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Dam, H. and Nordholm, S. 2015. Design of robust broadband beamformers with minimax criterion. International Journal of Innovative Computing, Information and Control. 11 (1): pp. 19-29.
    Source Title
    International Journal of Innovative Computing, Information and Control
    Additional URLs
    http://www.ijicic.org/ijicic-14-01025.pdf
    ISSN
    13494198
    School
    Department of Mathematics and Statistics
    URI
    http://hdl.handle.net/20.500.11937/35755
    Collection
    • Curtin Research Publications
    Abstract

    Broadband beamformers are known to be sensitive to errors and mismatches in their array elements. This paper proposes a robust minimax beamformer design which takes into account sensor element characteristics. The design formulation minimizes robust integral squared error subject to relaxation constraints on the peak deviation error for the beamformer. The advantage of the proposed formulation is that the design allows a trade-off between the peak deviation error and the sensitivity of the minimax error with respect to variations in sensor element characteristics. This improvement has been achieved with almost no increase in complexity compared with the original minimax problem. Design examples demonstrate that the proposed beamformer is less sensitive with respect to variations in sensor element characteristics when compared to the traditional minimax beamformer with a minor degradation in beamformer performance.

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