Near-echo suppression

Details Near-echo suppression Near-echo suppression

2006-05-02

2006-05-02

Pham, Chi (Department: 2667)

Multiplex communications

Duplex

Communication over free space

C370S285000, C370S402000

Reexamination Certificate

active

07039020

ABSTRACT:
The hybrid circuit can be used to substantially reduce near echo signals. The circuit includes a balanced 2-wire to 4-wire hybrid for interconnecting a two wire receive path and a two wire transmit path to a two wire transmission line. The two wire receive path connects the balanced hybrid to an A/D converter and the two wire transmit path connects a D/A converter to the balanced hybrid. The two wire receive path contains a filter, dimensioned to remove signals transmitted from the D/A converter. The invention is particularly adapted for use with FDD and OFDD.

REFERENCES:
patent: 4989221 (1991-01-01), Qureshi et al.
patent: 5305379 (1994-04-01), Takeuchi et al.
patent: 5479503 (1995-12-01), Fujiwara
patent: 5627863 (1997-05-01), Aslanis et al.
patent: 5633863 (1997-05-01), Gysel et al.
patent: 5917809 (1999-06-01), Ribner et al.
patent: 6333920 (2001-12-01), Nguyen et al.
patent: 38 04 332 (1989-08-01), None

Affiliated with

Also associated with

Rating

Near-echo suppression does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Near-echo suppression, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near-echo suppression will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3636228