Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2007-02-27
2007-02-27
Ho, Duc (Department: 2616)
Multiplex communications
Duplex
Transmit/receive interaction control
C375S346000
Reexamination Certificate
active
10154707
ABSTRACT:
Techniques are provided for reducing the magnitude of echo tails in a near-end modem. The invention may use an echo tail canceller to generate a signal that cancels echo tail. One characteristic of the echo tail canceller may be determined during a time when only the near-end modem is scheduled to transmit signals. Another characteristic of the echo tail canceller may be determined at approximately the time that a body echo canceller has reached convergence and may be re-determined periodically thereafter. The near-end modem may subtract from any received signal an echo tail canceller signal generated by the echo tail canceller to cancel echo tail from the received signal.
REFERENCES:
patent: 6256383 (2001-07-01), Chen
patent: 6317419 (2001-11-01), Olafsson et al.
patent: 6583662 (2003-06-01), Lim
patent: 6694010 (2004-02-01), Verreault
patent: 6813352 (2004-11-01), Duttweiler
patent: 6826279 (2004-11-01), Alavi et al.
patent: 2003/0016815 (2003-01-01), Kurtz et al.
patent: 2005/0117739 (2005-06-01), Demirekler et al.
Telecommunication Standarization Sector of Itu, “Series G: Transmission Systems and Media, Digital Systems and Networks” Single-pair high-speed digital subscriber line (SHDSL) transceivers—For approval—Updated G.991.2 (Feb. 2001), 183 pgs.
Dandawate Amod V.
Xie Qian C.
Zeng Huaiyu
Choi Glen B.
Ho Duc
LandOfFree
Techniques to cancel echo tail does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Techniques to cancel echo tail, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Techniques to cancel echo tail will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3820368