Apparatus and method for echo-cancellation

Details Apparatus and method for echo-cancellation Apparatus and method for echo-cancellation

2003-05-19

2011-10-25

Elahee, MD S (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406130

Reexamination Certificate

active

08045703

ABSTRACT:
There is disclosed a multi-carrier transceiver system for use in echo cancellation. The transceiver system is arranged to generate from input data a multicarrier transmit signal comprising a plurality of multi-carrier data blocks. The transceiver system also has a multi-carrier signal receiver responsive to an input multi-carrier receive signal received from a remote signal transmitter. An echo canceller is arranged to generate from a pair of multi-carrier data blocks (u) a set of frequency-domain echo parameters for use in generating an echo signal, to generate the echo signal using the frequency-domain echo parameters, and to input the echo signal to the multi-carrier signal receiver for use in generating an echo-cancelled receive signal from the input receive signal and the echo signal.

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