Circuit for discriminating received signal modulation type

Details Circuit for discriminating received signal modulation type Circuit for discriminating received signal modulation type

1995-12-01

1997-02-04

Chin, Stephen

Pulse or digital communications

Testing

455142, 455228, H04B 346

Patent

active

056006730

ABSTRACT:
A circuit for discriminating the modulation type of a received signal capable of discriminating the modulation type at high speed. This circuit includes: a clock recovery circuit for recovering a data clock from received data; a phase difference detector for detecting a phase difference between the data clock recovered by the clock recovery circuit and the received data; a deviation calculation circuit for calculating a deviation between the phase difference detected by the phase difference detector and a deviation reference value preset in accordance with a modulation type; a squaring circuit for squaring the deviation calculated by the deviation calculation circuit; an average value calculation circuit for calculating an average value of a predetermined plurality number of consecutive ones of the square output calculated by the squaring circuit; and a comparator for comparing the average value calculated by the average value calculation circuit with a predetermined decision reference value and outputting a discrimination signal in accordance with the comparison results.

REFERENCES:
patent: 5260975 (1993-11-01), Saito

Affiliated with

Also associated with

Rating

Circuit for discriminating received signal modulation type 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 discriminating received signal modulation type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for discriminating received signal modulation type will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-686618