Method and apparatus for echo cancellation in an asymmetric...

Details Method and apparatus for echo cancellation in an asymmetric... Method and apparatus for echo cancellation in an asymmetric...

2005-02-08

2005-02-08

Lee, Andy (Department: 2663)

Multiplex communications

Duplex

Transmit/receive interaction control

C370S465000, C375S222000, C379S406010

Reexamination Certificate

active

06853626

ABSTRACT:
A method and system for canceling echo signals originating from a transmitter at a predetermined data rate. The echo signals are received by a receiver at a different data rate. The echo system is configured to manipulate data rates of transmitted signals, and reconstruct echo signals for consideration by the receiver. In view of the band-limited nature of these echo signals, the invention intelligently reduces the computational complexity of reconstructing and canceling echo signals.

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Ho et al., (1996), Discrete Multitone Echo Cancelation, IEEE Transaction on Communications vol. 44 No. 7, pp. 817-825.
Ruiz et al., (1992), Discrete Multiple Tone Modulation with Coset Coding for the Spectrally Shaped Channel, IEEE Transactions on Communications, vol. 40, No. 6 pp. 1012-1029.

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