Method of performing convergence in a, least mean square,...

Details Method of performing convergence in a, least mean square,... Method of performing convergence in a, least mean square,...

H - Electricity

04

B

H04B 3/20 (2006.01) H04B 3/21 (2006.01) H04B 7/015 (2006.01)

Patent

CA 2093744

A method is described of decreasing convergence time in an adaptive echo canceller (20). The method includes the step of locating a primary echo within a filter vector based upon relative tap values within the filter vector. The filter vector is then narrowed, based upon the located taps. An estimated error is determined based, in part, upon the narrowed filter vector. An updated filter vector is produced based, in part, upon the estimated error.

Méthode servant à réduire le temps de convergence d'un annuleur d'écho par filtrage adaptatif (20). La méthode comprend notamment l'étape de la localisation d'un écho primaire à l'intérieur d'un vecteur de filtre d'après des valeurs de prises relatives dans ce vecteur de filtre. Le vecteur est ensuite réduit en fonction des prises décelées. Une estimation de l'erreur est basée, en partie, sur le vecteur réduit. Un vecteur de filtre mis à jour est obtenu, en partie, en fonction de l'estimation de l'erreur.

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