NDLI: Sub band-selective partially adaptive broadband beamforming with cosine-modulated blocking matrix

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Sub band-selective partially adaptive broadband beamforming with cosine-modulated blocking matrix

Content Provider	IEEE Xplore Digital Library
Author	Liu, Wei Weiss, Stephan Hanzo, Lajos
Copyright Year	2002
Description	Author affiliation: Communications Research Group, Dept. of Electronics & Computer Science, University of Southampton, SO17 1BJ, U.K. (Liu, Wei; Weiss, Stephan; Hanzo, Lajos)
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.
File Size	944017
File Format	PDF
ISBN	0780374029
ISSN	15206149
DOI	10.1109/ICASSP.2002.5745258
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-05-13
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency modulation Array signal processing Sensors Filtering
Content Type	Text
Resource Type	Article

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