Subband Adaptive Filters with Pre-whitening Scheme for Acoustic Echo Cancellation

  • Hun Choi
  • Jae Won Suh
  • Hyeon-Deok Bae
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4251)


The signal-decorrelating properties of the AP algorithm and the subband filtering improve the convergence speed of the conventional AP adaptive filter. In this paper, a new subband adaptive filtering with pre-whitening scheme for acoustic echo cancellation is presented. The proposed algorithm provides fast convergence and reduced computational complexity by combining merits of the affine projection (AP) algorithm and the subband filtering. The projection order of AP adaptive filter can be decreased by subband partitioning with the polyphase decomposition and the noble identity. The decreased projection order reduces the computational complexity in the proposed algorithm. Computer simulations illustrate the convergence rate improvements and the computational efficiency of the proposed algorithm and show the validity of the theoretical results.


Normalize Little Mean Square Projection Order Acoustic Echo Cancellation Polyphase Component Subband Structure 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Hun Choi
    • 1
  • Jae Won Suh
    • 1
  • Hyeon-Deok Bae
    • 1
  1. 1.Dep. of Electronic EngineeringChungbuk National UniversityKorea

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