Circuit for evaluating frequency difference

Details Circuit for evaluating frequency difference Circuit for evaluating frequency difference

1991-04-30

1993-10-26

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 80, 375 97, 329304, H04L 2714, H04L 2722, H04L 2706

Patent

active

052572919

ABSTRACT:
A digital cellular radiocommunication system includes a circuit for evaluating the frequency difference between a local signal and the carrier wave of a receive signal which are close together in frequency, the receive signal having been subjected to phase state modulation by a modulation signal and thus having a phase that includes a transmission phase shift, a modulation phase shift corresponding to one of a plurality of phase states, and a synchronization phase shift due to the frequency difference. The circuit produces samples of the receive signal from which the transmission phase shift has been eliminated, detects the modulation phase shift of the samples in order to eliminate it, produces the mean phase of a series of samples, and produce the frequency difference on the basis of the mean phase of at least two series of samples and on the basis of the time interval between the middles of the series.

REFERENCES:
patent: 4438524 (1984-03-01), Muilwijk
patent: 4466108 (1984-08-01), Rhodes
patent: 4527278 (1985-07-01), Deconche et al.
patent: 5081652 (1992-01-01), Farahati et al.

Affiliated with

Also associated with

Rating

Circuit for evaluating frequency difference does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-965151