Patent ID: 6041290
Filing Date: 2000-03-21
Classification: H04M

Abstract:
A method of adaptive echo compensation with a digital filter whose number n of filter coefficients (c.sub.i), or briefly its set of filter coefficients (C(j)), is calculated in accordance with the Normalized-Least-Mean-Square algorithm, in a transmission system in which a coupling occurs between a signal path in the receiving direction and a signal path in the transmitting direction, characterized in thatthe set of filter coefficients (C(j)) is compared to an envelope curve (H(j)),an error measurement (F(j)) is calculated from the variation between the values of the set of filter coefficients (C(j)) and those provided by the envelope curve (H(j)),only the set of filter coefficients (C(j)) in which the error measurement (F(j)) drops below a threshold value is used further to adjust the digital filter.