Title :
An adaptive IIR echo canceller combining output-error and equation-error criteria
Author :
Gerald, J.A.B. ; Esteves, N.L. ; Silva, M.M.
Author_Institution :
Dept. of Electr. & Comput. Eng., I.S. Tecnico, Lisboa, Portugal
Abstract :
An echo canceller structure which permits the combined use of the equation error and the output error criteria in the adaptation of the coefficients is presented. A method is described for the smooth transition between the two criteria in such a way that the advantages of both are retained and their drawbacks are eliminated. Further improvement is obtained by using lattice structures in the realization of some of the canceller´s blocks. Computer simulation results are presented which confirm the superior performance of the echo canceller with respect to other realizations
Keywords :
adaptive filters; digital filters; echo suppression; adaptive IIR echo canceller; computer simulation results; echo canceller structure; equation-error criteria; lattice structures; output error criteria; smooth transition between criteria; Computer errors; Computer simulation; Echo cancellers; Equations; Estimation error; Filters; Lattices; Polynomials; Switches; Transfer functions;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112195
