Method and apparatus for fast converging affine projection...

H - Electricity – 04 – B

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H04B 3/23 (2006.01) H03H 21/00 (2006.01)

Patent

CA 2421759

An adaptive filter estimates a channel weight vector of an echo channel using an affine projection (AP) update. The echo channel receives a send input sequence and a receive input sequence. The channel weight vector has first and second lengths when the adaptive filter operates in a first adaptation mode and a second adaptation mode, respectively. A delay estimator determines a delay in the echo channel using the adaptive filter in the first adaptation mode.

Un filtre adaptatif produit une estimation de vecteur de pondération de canal d'un canal d'écho à l'aide d'une mise à jour de projection (AP) affine. Le canal d'écho reçoit une séquence d'entrée d'émission et une séquence d'entrée de réception. Le vecteur de pondération de canal comporte une première et une deuxième longueur lorsque le filtre adaptatif fonctionne dans un premier mode d'adaptation et dans un deuxième mode d'adaptation, respectivement. Un estimateur de retard détermine un retard dans le canal d'écho à l'aide du filtre adaptatif dans le premier mode d'adaptation.

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