QPSK demodulator

Details QPSK demodulator QPSK demodulator

1976-11-26

1978-04-18

Kominski, John

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325472, 329133, 331 12, H03D 302

Patent

active

040853780

ABSTRACT:
An improved quadraphase shift keyed (QPSK) adaptive demodulator includes a Costas loop modified to independently cross couple the inphase (I) and quadraphase (.phi.) channels so that minimum cross talk takes place between the I and Q channels. Advantageously, the improved QPSK adaptive demodulator separates the feedback control for correcting the phasor errors in the I and Q phasors. Advantageously, the improved demodulator permits independent phase adjustment of the I and Q demodulator outputs.

REFERENCES:
patent: 2843662 (1958-07-01), Rieke
patent: 3486120 (1969-12-01), Doesschate, Jr.
patent: 3566285 (1971-02-01), Schroeder
patent: 3568067 (1971-03-01), Williford
patent: 3748590 (1973-07-01), Gray
patent: 3810018 (1974-05-01), Stover
patent: 3947636 (1976-03-01), Edgar
patent: 3952260 (1976-04-01), Prochazka

Affiliated with

Also associated with

Rating

QPSK demodulator does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2148869