Title :
Optimal variable step LMS look-up-table plus transversal filter nonlinear echo cancellers
Author :
Weruaga-Prieto, L. ; Cid-Sueiro, J. ; Figueiras-Vidal, A.R.
Author_Institution :
DSSR, Ciudad Univ., Madrid, Spain
Abstract :
An optimal least-mean-square (LMS) algorithm is presented to be used with a lookup-table plus transversal filter adaptive echo canceller that has independent steps for the non-overlapped and overlapped parts of the transversal structure. Its advantage over previous schemes and algorithms used with this family of structures is presented. A suboptimal switched step version is discussed. Some simulation examples illustrate the performances of these schemes
Keywords :
adaptive filters; digital filters; echo suppression; filtering and prediction theory; least squares approximations; table lookup; lookup-table plus transversal filter adaptive echo canceller; nonlinear echo cancellers; optimal variable-step LMS algorithm; Adaptive filters; Convergence; Decision support systems; Echo cancellers; Finite impulse response filter; Least squares approximation; Performance analysis; Switches; Telecommunication standards; Transversal filters;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.226444
