Communications – electrical: acoustic wave systems and devices – Distance or direction finding – By combining or comparing signals
Patent
1990-02-05
1991-10-08
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Distance or direction finding
By combining or comparing signals
367901, 367 98, G01S 1500
Patent
active
050560689
ABSTRACT:
For detecting a quickly or sharply varying signal (the event) against a background of a more slowly changing ambient signal (the background), the envelope detector inputs the signal and full wave rectifies it. It sends the signal to the background filter and event filter, each of which includes an RC circuit. The background filter and event filter each independently process the signal to be evaluated in different manners based on the intrinsic frequency characteristics of the event signal, and of the background signal. The outputs of the two filter sections are sent to the decision section. Based on its processing, the decision section outputs a signal in one of two states, one corresponding to detection, and the other corresponding to non-detection.
REFERENCES:
patent: 3641267 (1972-02-01), Cavalarri
patent: 3975672 (1976-08-01), Lachocki
patent: 4006907 (1977-02-01), Heffley
patent: 4074325 (1978-02-01), Sakai et al.
patent: 4195335 (1980-03-01), Murakami
patent: 4305142 (1981-12-01), Springer
patent: 4322828 (1982-03-01), Hoff et al.
patent: 4409473 (1983-10-01), Furuta et al.
patent: 4847817 (1989-07-01), Au et al.
patent: 4889388 (1989-12-01), Hime
patent: 4898388 (1990-02-01), Beard et al.
Accu-Sport International, Inc.
Pihulic Daniel T.
LandOfFree
Apparatus and method for detecting sharp signal variations again does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for detecting sharp signal variations again, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for detecting sharp signal variations again will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-262724