Index decoder for digital modems

Details Index decoder for digital modems Index decoder for digital modems

1985-04-15

1987-02-24

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 14, 375 81, 329112, H04L 512, H04L 2302

Patent

active

046463259

ABSTRACT:
In a QAM digital modem decoder section, the received signals (after equalization) are transposed to a preselected quadrant of the signal constellation to generate an index pointer. The index pointer and the actual quadrant are used to decode the QAM signals. The index pointer is also used to update the equalizer taps and to operate a phase tracking loop used to reduce or eliminate phase jitter.

REFERENCES:
patent: 3518680 (1970-06-01), McAuliffe
patent: 3675139 (1972-07-01), Guest
patent: 4024342 (1977-05-01), Croisier et al.
patent: 4317210 (1982-02-01), Dekker et al.
patent: 4438524 (1984-03-01), Muilwijk

Affiliated with

Also associated with

Rating

Index decoder for digital modems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Index decoder for digital modems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Index decoder for digital modems will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-114429