Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2007-11-20
2007-11-20
Pham, Chi (Department: 2616)
Multiplex communications
Duplex
Transmit/receive interaction control
C375S222000, C375S254000, C375S350000, C379S406010, C379S406060
Reexamination Certificate
active
10253668
ABSTRACT:
According to one exemplary embodiment, a communication device comprises a line driver, where the line driver provides an output signal. The communication device further comprises a digital echo canceller module coupled to the line driver, where the digital echo canceller module receives an echo reference signal determined by the output signal of the line driver, where the echo canceller module outputs an echo cancellation signal, and where the echo cancellation signal is capable of canceling linear and non-linear components of a composite signal. The communication device further comprises a summation module coupled to the digital echo canceller module, where the summation module receives the echo cancellation signal and the composite signal, and where the composite signal comprises a received signal and the linear and non-linear echo components. The summation module is configured to subtract the echo cancellation signal from the composite signal and to output the received signal.
REFERENCES:
patent: 4669116 (1987-05-01), Agazzi et al.
patent: 5680450 (1997-10-01), Dent et al.
patent: 6147979 (2000-11-01), Michel et al.
patent: 6522688 (2003-02-01), Dowling
Farjami & Farjami LLP
Hom Shick
Mindspeed Technologies Inc.
Pham Chi
LandOfFree
Echo cancellation in a communication device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Echo cancellation in a communication device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echo cancellation in a communication device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3848800