Echo canceller for two-wire full duplex digital data transmissio

Details Echo canceller for two-wire full duplex digital data transmissio Echo canceller for two-wire full duplex digital data transmissio

1993-11-09

1995-02-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379411, H04B 323

Patent

active

053880927

ABSTRACT:
An echo canceller comprises an adaptive digital filter and a low frequency component suppresser. The canceller is used for two-wire full duplex digital data transmission system. The adaptive filter comprises a transversal filter with plural number of taps for generating an echo replica signal by adaptively estimating the time-varying transfer characteristics of an echo path in order to suppress the echo signal from the echo path. The low frequency component suppresser is installed in parallel with the adaptive filter to effectively increase the number of taps of the transversal filter, and to suppress the level of the low frequency component contained in a residual echo signal which is the difference between the echo signal and the echo replica signal at tail portion of the impulse response of the echo replica signal. Due to the low frequency component suppresser, the number of taps of transversal filter is considerably decreased and the arithmetic operation is greatly reduced.

REFERENCES:
patent: 4535206 (1985-08-01), Falconer
patent: 4697261 (1987-09-01), Wang et al.
patent: 4769808 (1988-09-01), Kanemasa et al.
patent: 4805215 (1989-02-01), Miller
patent: 4852081 (1989-07-01), Bonnet et al.
patent: 4918685 (1990-04-01), Tol et al.
patent: 4920530 (1990-04-01), Wouda et al.
patent: 4965786 (1990-10-01), Salle
patent: 5008923 (1991-04-01), Kitamara et al.
patent: 5029204 (1991-07-01), Shenoi et al.
patent: 5042026 (1991-08-01), Koike et al.
A new digital echo canceler for two-wire full-duplex data transmission, Kurt H. Mueller, vol. COM-24, No. 9, pp. 956-963, Sep. 1976.

Affiliated with

Also associated with

Rating

Echo canceller for two-wire full duplex digital data transmissio 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 canceller for two-wire full duplex digital data transmissio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Echo canceller for two-wire full duplex digital data transmissio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1115161