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    Broadband Beamforming and Optimization

    Access Status
    Fulltext not available
    Authors
    Nordholm, Sven
    Dam, Hai Huyen Heidi
    Lai, Chiong Ching
    Lehmann, E.
    Date
    2014
    Type
    Book Chapter
    
    Metadata
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    Citation
    Nordholm, S. and Dam, H. and Lai, C. and Lehmann, E. 2014. Broadband Beamforming and Optimization. In Zoubir, A.M. (ed), Academic Press Library in Signal Processing: Array and Statistical Signal Processing (Volume 3), pp. 553-598. Massachusetts: Elsevier.
    Source Title
    Academic Press Library in Signal Processing Volume 3Array and Statistical Signal Processing
    DOI
    10.1016/B978-0-12-411597-2.00013-8
    ISBN
    9780124115972
    School
    Department of Electrical and Computer Engineering
    URI
    http://hdl.handle.net/20.500.11937/24275
    Collection
    • Curtin Research Publications
    Abstract

    Broadband beamforming techniques are of importance in several applications such as microphone arrays, sonar arrays, and radio astronomy and broadband radar. The capability to obtain a good broadband response over a wide range of frequencies is important to maintain good signal integrity and spatial selectivity. Since the beamformer needs to operate over several octaves, there are a number of important considerations in the design, such as beamformer beamwidth in the low frequency range and sensor element placement. The beamformer design can be performed directly in the wave domain. However, the more common approach is to design the beamformer in the spatially sampled domain. Another way to design the beamformer weights is according to the presented data, which gives an optimal beamformer. Other important aspects of beamforming are the capability to steer the beam towards a specific input signal and also capability to focus the beamformer in the near field.

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      In this article, we consider the design of broadband beamformers with low complexity. In fact, the design problem is multi-objective in nature, trading off between speech distortion and noise suppression. Finding a balance ...
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