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, USA, pp. 2913-2916. ISBN 0-7803-7402-9 (https://doi.org/10.1109/ICASSP.2002.5745258)
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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.
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Item type: Book Section ID code: 39619 Dates: DateEvent2002PublishedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 09 May 2012 10:56 Last modified: 08 Apr 2024 12:55 URI: https://strathprints.strath.ac.uk/id/eprint/39619