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Acoustic Echo Cancellation with Reduced-Rank Adaptive Interpolated Filter Based on Parallel-Branch Diversity Decimation

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3 Author(s)
Masahiro Yukawa ; Next Generation Mobile Communications Laboratory, CIPS, RIKEN, Japan. E-Mail: ; Rodrigo C. de Lamare ; Raimundo Sampaio-Neto

This paper presents an efficient acoustic echo cancellation (AEC) scheme based on reduced-rank interpolated adaptive filtering with parallel decimation, motivated by diversity techniques developed in wireless communications. The proposed scheme jointly optimizes an interpolation filter, a decimator unit and a reduced-rank filter in such a way that the output error is minimized, leading to very substantial improvements of the mean squared error performance. With a practical choice of parameters in AEC, the total computational complexity of the proposed scheme is approximately half of the one of the NLMS algorithm. The numerical examples demonstrate that the proposed algorithm offers very significant reduction in mean squared error performance.

Published in:

2007 15th International Conference on Digital Signal Processing

Date of Conference:

1-4 July 2007