Echo canceller

Details Echo canceller Echo canceller

1993-11-23

1995-05-09

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379402, 379406, 379407, 379390, H04M 908

Patent

active

054147670

ABSTRACT:
An echo canceller arrangement (1) receives data x(i) which are likely to generate an echo r(i), and data y(i)+r(i) affected by the echo. An echo synthesizer (50) forms a replica r'(i) of the echo r(i) on the basis of a series of data delayed by delay elements 70.sub.1 . . . 70.sub.N and weighted by weight factors c.sub.k, where k=1, . . . , N. An arithmetic element (85) determines the factors c.sub.k according to:

REFERENCES:
patent: 5263020 (1993-11-01), Yatsuzuka et al.
An Adaptive Step Sign Algorithm for Fast Convergence of a Data Echo Canceller (IEEE Transactions on Communications, vol. COM-35, No. 10 Oct. 1987) Akira Kanemasa.
A. Kanemasa, and K. Niwa, "an Adaptive-Step Sign Algorithm for Fast Convergence of a Data Echo Canceller", IEEE, vol. COM-35, No. 10, Oct. 1987, pp. 1102-1108.
M. Bellanger, Analyse Des Signaux et Filtrage Numerique Adaptatif, Collection Technique Et Scientifique Des Telecommunication, 1989, pp. 126-130.

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