Demodulator for multiphase PSK or multilevel QAM signals

Details Demodulator for multiphase PSK or multilevel QAM signals Demodulator for multiphase PSK or multilevel QAM signals

1985-08-27

1986-10-28

LaRoche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

H03D 318

Patent

active

046201599

ABSTRACT:
In a demodulation circuit, a timing synchronizing circuit generates a timing signal representing a sampling timing of an A/D converter and has a timing signal generator, a polarity identification circuit and a logic circuit. The timing signal generator is phase-controlled by a phase control signal and generates a timing signal. The polarity identification circuit identifies a polarity of a differential coefficient of the baseband signal at a sampling point of the A/D converter and generates a polarity identification signal. Upon logic processing, the logic circuit supplies to the timing signal generator the phase control signal representing a deviation of an actual sampling point of the baseband signal from an optimal sampling point. A carrier asynchronism detection circuit detects an asynchronism state of a carrier regenerating circuit and supplies to the timing synchronizing circuit a signal which changes its loop parameter.

REFERENCES:
patent: 2972720 (1961-02-01), Hume
patent: 4205277 (1980-05-01), Poinas
patent: 4344040 (1982-08-01), Reilly et al.
patent: 4482869 (1984-11-01), Hirata
patent: 4528512 (1985-07-01), Yoshida
patent: 4546322 (1985-09-01), Crutcher

Affiliated with

Also associated with

Rating

Demodulator for multiphase PSK or multilevel QAM signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Demodulator for multiphase PSK or multilevel QAM signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demodulator for multiphase PSK or multilevel QAM signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1348996