Method and device for adaptive identification and related adaptive echo canceller

摘要

the system uses a vector processing technique to cancel echoes on received signals. The device receives an input signal (x1) and an observation signal (y1), one component of which is the response of a system to the input signal. The device determines an error signal (e1) at an instant, t, according to the expression (et = yt - XTt Ht-1, where Ht-1 is a vector composed of L coefficients of an identification filter (18) with a finite pulse response representative of the pulse response of the system, and XTt = (x-t, xt-1...,xt-L+1). A predictive analysis of the input signal is effected by a carrier calculation on the frames of the input signal. The L coefficients of the identification filter are adapted by adding to the vector Ht-1, a further vector composed of L values of a prediction residue derived from preceding values.