Pulse or digital communications – Repeaters – Testing
Patent
1978-10-16
1980-04-08
Bookbinder, Marc E.
Pulse or digital communications
Repeaters
Testing
307232, 307233R, 328141, H04B 110
Patent
active
041975022
ABSTRACT:
A digital signal detector is disclosed that detects a serial bit stream transmitted at a predetermined bit frequency. Bit transitions are totallized in a counter over a predetermined time interval. Bit transitions occurring during a good window interval increment the totallized count by one. Bit transitions occurring during a bad window interval decrement the totallized count by one. Bit transitions occurring during a marginal window interval, situated between the good and bad window intervals, do not affect the totallized count. If the counter reaches a predetermined count during the time interval, a detect signal is provided indicating that the digital signal has been detected. The counter can be further loaded with a threshold count for tailoring the digital signal detector for operation at a particular signal-to-noise ratio. Periodic signals that have frequencies that are submultiples of the bit frequency are detected by correlating the digital signal between two predetermined stages of a shift register. The digital signal detector may provide a detector output signal when both the digital signal is detected and periodic signals having submultiple frequencies are not present.
REFERENCES:
patent: 3278759 (1966-10-01), Rekiere
patent: 3437937 (1969-04-01), Warnfield
patent: 3526841 (1970-09-01), Holmboe et al.
patent: 3723890 (1973-03-01), Hutsinger
patent: 3927260 (1975-12-01), Amundson et al.
patent: 3939431 (1976-02-01), Cohlman
patent: 3995225 (1976-11-01), Horn
patent: 4080572 (1978-05-01), Hastings et al.
Backof, Jr. Charles A.
Sumner Terence E.
Bookbinder Marc E.
Durigon Peter
Gillman James W.
Hackbart Rolland R.
Motorola Inc.
LandOfFree
Digital signal detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital signal detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital signal detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-975761