Residual echo reduction for a full duplex transceiver

Details Residual echo reduction for a full duplex transceiver Residual echo reduction for a full duplex transceiver

2006-07-25

2006-07-25

Vo, Don N. (Department: 2631)

Pulse or digital communications

Transceivers

C375S285000, C370S289000, C379S406050

Reexamination Certificate

active

07082157

ABSTRACT:
A hybrid circuit within a full-duplex transceiver transmits an outgoing signal outward on a communication channel at the same time it receives an incoming signal arriving via the communication channel, and the outgoing and incoming signals sum to form a combined signal. The hybrid circuit generates both the outgoing signal and a replica of the outgoing signal in response to an input signal, and then subtracts the replica from the combined signal in producing a received signal. The received signal includes a component derived from the incoming signal and a residual echo component having peaks resulting from a phase difference between the outgoing signal and its replica. The transceiver periodically digitizes the received signal to produce a data sequence representing the incoming signal. The transceiver adjustably delays the input signal so that the residual echo component peaks occur at times other then when the received signal is being digitized, thereby minimizing the influence of the echo component peaks on the data sequence.

REFERENCES:
patent: 2003/0099208 (2003-05-01), Graziano et al.
patent: 2003/0138038 (2003-07-01), Greiss et al.
patent: 2004/0013178 (2004-01-01), Bui et al.
patent: 2004/0184518 (2004-09-01), Agazzi

Affiliated with

Also associated with

Rating

Residual echo reduction for a full duplex transceiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Residual echo reduction for a full duplex transceiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Residual echo reduction for a full duplex transceiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3576438