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Overlap-save frequency invariant generalised sidelobe canceller

Koh, C.L. and Weiss, S. (2005) Overlap-save frequency invariant generalised sidelobe canceller. In: 8th International Symposium on Signal Processing and Its Applications, 2005-08-28 - 2005-08-31, Sydney.

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Abstract

In this paper, we propose a frequency invariant adaptive broadband beamformer based on an overlap-save frequency domain implementation of the generalised sidelobe canceller (GSC). Broadband signals drawn from a nested array are decomposed into frequency bins which are grouped into octaves. Subsequently, frequency dependent weighting assigned to individual frequency bins restricts the variation in spatial resolution usually associated with broadband arrays of fixed aperture. A GSC beamformer is incorporated to achieve adaptive nulling of interferers, but requires modifications to the constraint equation of the standard GSC in order to account for the frequency-dependent weighting of sensors. Simulation results highlighting the benefits of the proposed approach are presented.

Item type: Conference or Workshop Item (Paper)
ID code: 38060
Keywords: overlap-save, frequency, invariant, generalised, sidelobe canceller, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 01 Mar 2012 14:26
    Last modified: 04 Oct 2012 17:25
    URI: http://strathprints.strath.ac.uk/id/eprint/38060

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