Method and apparatus for optimally autocorrelating an FSK signal

Details Method and apparatus for optimally autocorrelating an FSK signal Method and apparatus for optimally autocorrelating an FSK signal

1990-02-06

1991-08-13

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

329300, 329304, 375 83, 375 88, 375 9, 455142, H03D 300, H03D 500

Patent

active

050401920

ABSTRACT:
An autocorrelator for FSK signals. An FSK signal, incoming on a telephone line is filtered by a bandpass filter (13) and sampled by an A/D converter (14). A sample clock (15) provides a fixed sampling frequency, FS. A first interpolating filter (20B) provides selectable delays which are non-integer multiples of 1/FS, and an integer delay (25) provides selectable delays which are integer multiples of 1/FS. The delayed signals are multiplied by a multiplier (26) and then filtered by a low pass filter (27) to provide a filtered autocorrelated signal. A second interpolating filter (20A) provides for reduced jitter in the baud timing by increasing the number of samples provided to the decision logic (23). The decision logic (23) provides the decoded data output.

REFERENCES:
patent: 3387220 (1968-06-01), Lender
patent: 4486716 (1984-12-01), LeFloch
patent: 4716376 (1987-12-01), Daudelin
patent: 4750214 (1988-06-01), Hart et al.

Affiliated with

Also associated with

Rating

Method and apparatus for optimally autocorrelating an FSK signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for optimally autocorrelating an FSK signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optimally autocorrelating an FSK signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1532830