Automatic thresholding and reference circuit

Details Automatic thresholding and reference circuit Automatic thresholding and reference circuit

1976-11-12

1978-01-03

Wilbur, Maynard R.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 171R, 325474, G01S 942, G01S 734, H04B 112

Patent

active

040670139

ABSTRACT:
An automatic thresholding reference and detection circuit which generates a signal in time which is a replica of the radar return signal's doppler spectrum. The radar signal return is processed by a target signal channel having a narrow bandwidth filter which produces a fine resolution replica of the signal spectrum, and by a reference signal channel having a wider bandwidth filter, which produces a smeared (or average) replica of the signal spectrum. The output of the reference signal channel is a threshold signal which, when compared to the output of the target signal channel, allows only the target signals to be passed for further processing and rejects clutter and thermal noise.

REFERENCES:
patent: 2871468 (1959-01-01), Smith
patent: 3437834 (1969-04-01), Schwartz
patent: 3465336 (1969-09-01), Fishbein et al.
patent: 3744015 (1973-07-01), Marimon et al.

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