Cascade echo canceler arrangement

Details Cascade echo canceler arrangement Cascade echo canceler arrangement

1995-09-29

1998-09-29

Nguyen, Chau

Multiplex communications

Duplex

Transmit/receive interaction control

370291, 371411, H04B 323

Patent

active

058154965

ABSTRACT:
The problem of tracking rapid changes in the echo signals associated with modems is eliminated by using an echo canceler consisting of cascaded adaptive filters. Each filter in the structure contributes to the modeling of the overall echo path impulse response, with a longer filter providing the ability to model long echo path impulse responses and a shorter filter providing the ability to track changes in the echo path impulse response over time.

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