Carrier-frequency transmission of digital return signals in burs

Details Carrier-frequency transmission of digital return signals in burs Carrier-frequency transmission of digital return signals in burs

1995-09-07

1999-04-27

Grant, Chris

Telecommunications

Interference signal transmission

348 12, H04N 7173

Patent

active

058989013

ABSTRACT:
Quadrature amplitude modulation with two carrier signals orthogonal relative to one another is often used for the transmission of digital television and/or radio signals from a head end to subscribers in coaxial cable networks. This modulation method, however, is poorly suited for the return channel from the subscribers to the central because, due to the multitude of subscribers, the subscriber signals are often transmitted in burst mode. Thus, there is not adequate time for the phase-exact recovery of the carrier signals at the reception side. A single sideband amplitude modulation of the digital transmission signals is therefore undertaken for the carrier-frequency transmission of digital signals in burst mode.

REFERENCES:
patent: 3605017 (1971-09-01), Chertok et al.
patent: 4355397 (1982-10-01), Stuart
patent: 4625319 (1986-11-01), Krawitz
patent: 5387927 (1995-02-01), Look et al.
patent: 5408259 (1995-04-01), Warwick
patent: 5528582 (1996-06-01), Bodeep et al.
patent: 5553064 (1996-09-01), Paff et al.
patent: 5557319 (1996-09-01), Gurusami et al.

Affiliated with

Also associated with

Rating

Carrier-frequency transmission of digital return signals in burs does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carrier-frequency transmission of digital return signals in burs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier-frequency transmission of digital return signals in burs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-693187