EURASIP Journal on Audio, Speech, and Music Processing

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Research Article
Open Access

A Low Delay and Fast Converging Improved Proportionate Algorithm for Sparse System Identification

EURASIP Journal on Audio, Speech, and Music Processing20072007:084376

https://doi.org/10.1155/2007/84376

©  Andy W.H. Khong et al. 2007

Received: 4 July 2006

Accepted: 24 January 2007

Published: 3 April 2007

Abstract

A sparse system identification algorithm for network echo cancellation is presented. This new approach exploits both the fast convergence of the improved proportionate normalized least mean square (IPNLMS) algorithm and the efficient implementation of the multidelay adaptive filtering (MDF) algorithm inheriting the beneficial properties of both. The proposed IPMDF algorithm is evaluated using impulse responses with various degrees of sparseness. Simulation results are also presented for both speech and white Gaussian noise input sequences. It has been shown that the IPMDF algorithm outperforms the MDF and IPNLMS algorithms for both sparse and dispersive echo path impulse responses. Computational complexity of the proposed algorithm is also discussed.

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Authors’ Affiliations

(1)
Department of Electrical and Electronic Engineering, Imperial College London
(2)
INRS-EMT, Université du Québec

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Copyright

© Andy W.H. Khong et al. 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.