Non-linear adaptive filters

Details Non-linear adaptive filters Non-linear adaptive filters

H - Electricity

03

H

333/47, 340/72

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

Patent

CA 1258301

ABSTRACT OF THE DISCLOSURE A non-linear adaptive filter having particular use in echo cancellers for data modems has a linear filter connected in parallel with a non-linear filter. The linear filter provides fast adaptation until it has modelled the linear contribution of each coefficient. Thereafter the non-linear filter continues to adapt until the error signal has been reduced to an acceptable level. Preferably, unit delay devices provide taps to sub- processing units each of which is arranged to be adapted according to a linear algorithm during an initial part of a training period, and to a non-linear algorithm after said initial part.

507939

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