Threshold circuit for radar video data

Details Threshold circuit for radar video data Threshold circuit for radar video data

G - Physics

01

S

343/54

G01S 7/28 (2006.01) G01S 7/292 (2006.01) G01S 13/52 (2006.01) G01S 13/532 (2006.01)

Patent

CA 1180431

Abstract: A threshold circuit comprises a shift memory (1) supplied with sampled and digitised radar video data; two adder circuits (2, 3) connected to the first and the last elements of the shift memory (1); and a selection circuit (5) passing the greater of the two output signals from the adder circuits (2, 3). The output signal of the selection circuit (5) renders a first threshold value for the radar video data from the centre element of the shift memory (1). The threshold circuit further comprises a noise level detector (6) connected to the selection circuit (4), the output signal of which noise level detector (6) rendering a second threshold value for the radar data from the centre element of the shift memory (1). A comparator (10) and a gate circuit (13) are used to obtain the radar video data from the shift memory (1), in so far as the amplitude of said video data is in excess of the greater threshold value.

390289

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