Methods and apparatuses for detecting and reducing...

Details Methods and apparatuses for detecting and reducing... Methods and apparatuses for detecting and reducing...

2007-02-13

2007-02-13

Tsang, Fan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406090, C379S406130

Reexamination Certificate

active

10948406

ABSTRACT:
Apparatuses, systems, and methods for a multi-carrier communication system that detects and reduces an echo from a non-linear element present on the transmission medium. In an embodiment, a training period is established between a first transmitter-receiver device and a second transmitter-receiver device in the discrete multiple tone system that separates communication signals into two or more separate frequency bands. Noise caused by an echo generated by a non-linear element present on the transmission medium is detected during the training period. The significance of the non-linear echo contribution to the overall ambient noise level present in the system may be determined.

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