Title :
Acoustic Echo Cancellation with Reduced-Rank Adaptive Interpolated Filter Based on Parallel-Branch Diversity Decimation
Author :
Yukawa, Masahiro ; De Lamare, Rodrigo C. ; Sampaio-Neto, Raimundo
Author_Institution :
Next Generation Mobile Commun. Lab., RIKEN, Saitama, Japan
Abstract :
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.
Keywords :
adaptive filters; computational complexity; echo; echo suppression; mean square error methods; radio networks; NLMS algorithm; acoustic echo cancellation; computational complexity; decimator unit; interpolation filter; mean squared error performance; parallel-branch diversity decimation; reduced-rank adaptive interpolated filter; wireless communications; Adaptive filters; Computational complexity; Convergence; Covariance matrix; Echo cancellers; Finite impulse response filter; Interpolation; Mobile communication; Wiener filter; Wireless communication; adaptive interpolation; echo cancellation; parallel-branch diversity; reduced-rank adaptive filtering;
Conference_Titel :
Digital Signal Processing, 2007 15th International Conference on
Conference_Location :
Cardiff
Print_ISBN :
1-4244-0881-4
Electronic_ISBN :
1-4244-0882-2
DOI :
10.1109/ICDSP.2007.4288513