Multipoint data modem communication system

Details Multipoint data modem communication system Multipoint data modem communication system

1988-03-02

1989-03-28

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 14, H04B 138

Patent

active

048171140

ABSTRACT:
A multipoint data modem communication system includes a control modem (12) and a plurality of tributary modems (14, 16, 18). During an initial training mode, receiver parameters and equalizer coefficients are determined and stored in a storage device (156) in the control modem receiver at addresses associated with the tributary modems. During subsequent relatively short training signals, the stored parameters are accessed. The remote modems transmit identification address tones in parallel with the subsequent training signals, at frequencies separated by 200 Hz intervals from the training signal spectrum frequencies. A plurality of Discrete Fourier Transform (DFT) filter circuits (190) are utilized to determine the transmitted addresses by measuring the correlation of the received signal with locally-generated frequencies.

REFERENCES:
patent: 4416015 (1983-11-01), Gitlin
patent: 4577334 (1986-03-01), Boer et al.

Affiliated with

Also associated with

Rating

Multipoint data modem communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multipoint data modem communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multipoint data modem communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1665847