Echo canceller having Kalman filter for optimal adaptation

Details Echo canceller having Kalman filter for optimal adaptation Echo canceller having Kalman filter for optimal adaptation

1997-08-08

1999-11-30

Smith, Creighton

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379406, H04M 100

Patent

active

059956208

ABSTRACT:
Kalman filtering is applied to obtain a fast convering, low complexity echo. An averaged diagonal Riccati equation allows optimal time varying adaptation gains K(t) to be precomputed, or computed online with a small number of scalar Riccati equations.

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