Realization of Multi-Delay Filter Using Fermat Number Transforms

H. H. ALAEDDINE, E. H. BAGHIOUS, G. MADRE, G. BUREL
2008 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
This paper is about an efficient implementation of adaptive filtering for echo cancelers. The first objective of this paper is to propose a simplified method of the flexible block Multi-Delay Filter (MDF) algorithm in the time-domain. Then, we will derive a new method for the stepsize adaptation coefficient. The second objective is about the realization of a Block Proportionate Normalized Least Mean Squares (BPNLMS++) with the simplified MDF (SMDF) implementation. Using the new step-size method
more » ... and the smaller block dimension proposed by SMDF, we achieve a faster convergence of the adaptive process with a limited computational cost. Then, an efficient implementation of the new procedure (SMDF-BPNLMS++) block filtering is proposed using Fermat Number Transform, which can significantly reduce the computation complexity of filter implantation on Digital Signal Processor. key words: adaptive filters, echo canceler, Fermat transforms
doi:10.1093/ietfec/e91-a.9.2571 fatcat:2gprqfbsjvfz5nfkcuh6dmtvke