Demodulator including sweep controller for controlling synchroni

Details Demodulator including sweep controller for controlling synchroni Demodulator including sweep controller for controlling synchroni

1988-05-12

1989-10-03

Mis, David

Demodulators

Phase shift keying or quadrature amplitude demodulator

Input signal combined with local oscillator or carrier...

375 81, H03D 318

Patent

active

048719730

ABSTRACT:
A PSK demodulator uses a sweep controller to broaden a range in which synchronism may be captured. The invention uses a decision circuit jointly based on a received PSK signal and a recovered carrier wave for making a soft decision as to the correction required for synchronism. An error voltage is developed responsive to a phase error for causing the sweep controller to sweep when there is no synchronism and to remain fixed when there is synchronism. The resulting circuit eliminates false synchronism indications.

REFERENCES:
patent: 4000476 (1976-12-01), Walker et al.
patent: 4079329 (1978-03-01), England et al.
patent: 4691377 (1987-09-01), Yoshihara et al.
"AIAA 10th Communication Satellite Systems Conference", a Collection of Technical Papers, Orlando, Fla., Mar. 19-22, 1984.

Affiliated with

Also associated with

Rating

Demodulator including sweep controller for controlling synchroni 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 including sweep controller for controlling synchroni, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demodulator including sweep controller for controlling synchroni will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-666686