Open Access

Time-Domain Convolutive Blind Source Separation Employing Selective-Tap Adaptive Algorithms

EURASIP Journal on Audio, Speech, and Music Processing20072007:092528

DOI: 10.1155/2007/92528

Received: 30 June 2006

Accepted: 24 January 2007

Published: 5 April 2007

Abstract

We investigate novel algorithms to improve the convergence and reduce the complexity of time-domain convolutive blind source separation (BSS) algorithms. First, we propose MMax partial update time-domain convolutive BSS (MMax BSS) algorithm. We demonstrate that the partial update scheme applied in the MMax LMS algorithm for single channel can be extended to multichannel time-domain convolutive BSS with little deterioration in performance and possible computational complexity saving. Next, we propose an exclusive maximum selective-tap time-domain convolutive BSS algorithm (XM BSS) that reduces the interchannel coherence of the tap-input vectors and improves the conditioning of the autocorrelation matrix resulting in improved convergence rate and reduced misalignment. Moreover, the computational complexity is reduced since only half of the tap inputs are selected for updating. Simulation results have shown a significant improvement in convergence rate compared to existing techniques.

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Authors’ Affiliations

(1)
School of Information Technology and Engineering, University of Ottawa

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Copyright

© Q. Pan and T. Aboulnasr. 2007

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.