Method and apparatus for detecting a narrowband signal
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 14, 1989
Grant Date -
N/A
app pub date -
Jan 13, 1988
filing date -
Jan 13, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully