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A Novel Method for Partially Adaptive Broadband Beamforming

A Novel Method for Partially Adaptive Broadband Beamforming
A Novel Method for Partially Adaptive Broadband Beamforming
In this paper, a novel subband-selective generalized sidelobe canceller (GSC) for partially adaptive broadband beamforming is proposed. The blocking matrix of the GSC is constructed such that its columns constitute a series of bandpass filters, which select signals with specific direction of arrival angles and frequencies. This results in badlimited 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. We also discuss the design of both the blocking matrix and the filter banks for the subsequent subband decomposition. By these steps, the computational complexity of our subband-selective GSC is greatly reduced compared to other adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation, as simulations indicate.
361-372
Liu, W.
af656440-51e8-45c8-b694-a802e71b671e
Weiss, S.
55a13123-6604-4dad-b647-7347683c8c49
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, W.
af656440-51e8-45c8-b694-a802e71b671e
Weiss, S.
55a13123-6604-4dad-b647-7347683c8c49
Hanzo, L.
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, W., Weiss, S. and Hanzo, L. (2001) A Novel Method for Partially Adaptive Broadband Beamforming. Workshop on Signal Processing Systems (SIPS), Belgium. 26 - 28 Sep 2001. pp. 361-372 .

Record type: Conference or Workshop Item (Paper)

Abstract

In this paper, a novel subband-selective generalized sidelobe canceller (GSC) for partially adaptive broadband beamforming is proposed. The blocking matrix of the GSC is constructed such that its columns constitute a series of bandpass filters, which select signals with specific direction of arrival angles and frequencies. This results in badlimited 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. We also discuss the design of both the blocking matrix and the filter banks for the subsequent subband decomposition. By these steps, the computational complexity of our subband-selective GSC is greatly reduced compared to other adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation, as simulations indicate.

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More information

Published date: September 2001
Additional Information: Event Dates: 26-28 September 2001 Address: Antwerp, Belgium
Venue - Dates: Workshop on Signal Processing Systems (SIPS), Belgium, 2001-09-26 - 2001-09-28
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 257489
URI: http://eprints.soton.ac.uk/id/eprint/257489
PURE UUID: cc3a9a49-bde3-4103-b61f-8d8ab21aa8e0
ORCID for L. Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 06 Jan 2004
Last modified: 17 Dec 2019 02:03

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