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Subband-selective partially adaptive broadband beamforming with cosine-modulated blocking matrix

Liu, Wei and Weiss, S. and Hanzo, L. (2002) Subband-selective partially adaptive broadband beamforming with cosine-modulated blocking matrix. In: Proceedings of the 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP). IEEE, pp. 2913-2916. ISBN 0-7803-7402-9

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Abstract

In this paper, a novel subband-selective generalized sidelobe canceller (GSC) with cosine-modulation for partially adaptive broadband beamforming is proposed. The columns of the blocking matrix are derived from a prototype vector by cosine-modulation, and the broadside constraint is incorporated by imposing zeros on the prototype vector appropriately. These columns constitute a series of bandpass filters, which select signals with specific direction of arrivals and frequencies. This results in high pass-type bandlimited spectra of the blocking matrix outputs, which is further exploited by subband decomposition and discarding the low-pass subbands appropriately prior to running independent unconstrained adaptive filters in each non-redundant subband. By these steps, the computational complexity of our GSC implementation is greatly reduced compared to fully adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation in both spatial and temporal domains.

Item type: Book Section
ID code: 39619
Keywords: array signal processing, filtering, frequency modulation , sensors, 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: 09 May 2012 11:56
    Last modified: 06 Sep 2014 08:19
    URI: http://strathprints.strath.ac.uk/id/eprint/39619

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