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EURASIP Journal on Audio, Speech, and Music Processing
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Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications

EURASIP Journal on Audio, Speech, and Music Processing volume 2007, Article number: 071495 (2007) Cite this article

Abstract

In various adaptive estimation applications, such as acoustic echo cancellation within teleconferencing systems, the input signal is a highly correlated speech. This, in general, leads to extremely slow convergence of the NLMS adaptive FIR estimator. As a result, for such applications, the affine projection algorithm (APA) or the low-complexity version, the fast affine projection (FAP) algorithm, is commonly employed instead of the NLMS algorithm. In such applications, the signal propagation channel may have a relatively low-dimensional impulse response structure, that is, the number m of active or significant taps within the (discrete-time modelled) channel impulse response is much less than the overall tap length n of the channel impulse response. For such cases, we investigate the inclusion of an active-parameter detection-guided concept within the fast affine projection FIR channel estimator. Simulation results indicate that the proposed detection-guided fast affine projection channel estimator has improved convergence speed and has lead to better steady-state performance than the standard fast affine projection channel estimator, especially in the important case of highly correlated speech input signals.

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Authors and Affiliations

  1. Canberra Research Laboratory, National ICT Australia and Research School of Information Science and Engineering, The Australian National University, Canberra, ACT, 2612, Australia

    Yan Wu Jennifer

  2. School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia

    John Homer

  3. Departement Elektrotechniek, Katholieke Universiteit Leuven, ESAT/SCD, Kasteelpark Arenberg 10, Heverlee, 30001, Belgium

    Geert Rombouts & Marc Moonen

Authors
  1. Yan Wu Jennifer
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  2. John Homer
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  3. Geert Rombouts
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  4. Marc Moonen
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Corresponding author

Correspondence to Yan Wu Jennifer.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Jennifer, Y.W., Homer, J., Rombouts, G. et al. Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications. J AUDIO SPEECH MUSIC PROC. 2007, 071495 (2007). https://doi.org/10.1155/2007/71495

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  • DOI: https://doi.org/10.1155/2007/71495

Keywords

  • Channel Impulse Response
  • Channel Estimator
  • Adaptive Estimation
  • Speech Input
  • Engineer Acoustics