Method and apparatus for detecting a narrowband signal

Details Method and apparatus for detecting a narrowband signal Method and apparatus for detecting a narrowband signal

1988-01-13

1989-03-14

Noland, Tom

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 66, G01R 2316

Patent

active

048127434

ABSTRACT:
In a method and apparatus for discriminating between a broadband unipolar signal having a component within one or more of three predetermined frequency bands and a narrowband signal within one of the frequency bands, a signal under test is amplified by a gain which is inversely proportional to the DC content of the signal under test to normalize the signal under test. The normalized signal is bandpass filtered to attenuate components outside of the predetermined frequency bands and the filtered signal is compared to a reference signal. The signal under test is deemed to be a narrowband signal within one of the predetermined frequency bands if the filtered signal exceeds the reference signal. The method and apparatus are particularly useful for detecting test tones on optical fibers.

REFERENCES:
patent: 3882287 (1975-05-01), Simmonds
patent: 4458113 (1984-07-01), Tolman
patent: 4671653 (1987-06-01), So et al.
patent: 4672198 (1987-06-01), Presby
patent: 4686454 (1987-08-01), Pecukonis

Affiliated with

Also associated with

Rating

Method and apparatus for detecting a narrowband 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 detecting a narrowband signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting a narrowband signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-895847