Digital filter-type frequency demultiplexing device

Details Digital filter-type frequency demultiplexing device Digital filter-type frequency demultiplexing device

1992-12-18

1994-03-29

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 50, H04J 102

Patent

active

052991920

ABSTRACT:
After sampling a multicarrier signal, groups of multiplex modulated carriers with identical bandwidths are separated by group filters. Clock frequencies of the carriers are then reduced by decimators depending on their respective bandwidths. To separate each of the modulated carriers in each of the groups, a polyphase network architecture is combined with a stage of delay lines for processing separate groups of multiplexed modulated carriers with identical bandwidth by programming a Fourier transform complex multiplying circuit. The demultiplexing devices is programmed to process evolutive traffics of groups of multiplexed carriers by a switching stage linking outputs of the decimation filters to inputs of the delay line stage.

REFERENCES:
patent: 4131766 (1978-12-01), Narasimha
patent: 4358733 (1982-11-01), Hanahara
patent: 4393456 (1983-07-01), Marshall
patent: 4412325 (1983-10-01), Molo
patent: 4785447 (1988-11-01), Ichiyoshi
patent: 4961160 (1990-10-01), Sato et al.
"Alternatives for On-Board Digital Multicarrier Demodulation", by Enrico Del Re et al., International Journal of Satellite Communications, vol. 6, pp. 267-281, 1988.
"Multi-Carrier Demodulators for On-Board Processing Satellites", by W. H. Yim et al, International Journal of Satellite Communications, vol. 6, pp. 243-251, 1988.

Affiliated with

Also associated with

Rating

Digital filter-type frequency demultiplexing 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 Digital filter-type frequency demultiplexing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital filter-type frequency demultiplexing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-798149