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An efficient scheme for broadband adaptive beamforming

Weiss, Stephan and Stewart, Robert and Schabert, Marion and Proudler, I. and Hoffman, Michael (1999) An efficient scheme for broadband adaptive beamforming. In: 33rd Asilomar Conference on Signals, Systems, and Computers, 1999-10-24 - 1999-10-27, Pacific Grove, CA.

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Abstract

This paper introduces an oversampled subband approach to linearly constrained minimum variance adaptive broadband beamforming. This method is motivated by the considerable reduction in computation over fullband implementation and resulting large computational complexity when fullband beamformers with high spatial and spectral resolution are required. We present the proposed subband adaptive beamformer structure, discuss the advantages and limitations of it, and comment on the correct projection of the constraints in the subband domain. In a simulation, the proposed subband structure is compared to a fullband adaptive beamformer, highlighting the benefit of our method.