Range limited coherent frequency doppler surveillance system

Details Range limited coherent frequency doppler surveillance system Range limited coherent frequency doppler surveillance system

G - Physics

08

B

343/17

G08B 13/14 (2006.01) G01S 13/56 (2006.01) G01S 13/74 (2006.01) G08B 13/22 (2006.01) G08B 13/24 (2006.01)

Patent

CA 1240019

ABSTRACT OF THE DISCLOSURE A time limited coherent frequency doppler radar system monitors a precisely bounded merchandise detection zone for motion of a transducer therein. False alarms are reduced without limiting sensitivity by limiting the maximum radar signal propagation times to control the outer boun- daries of the detection region and by requiring a selected minimum motion within the detection zone. An even more precisely bounded merchandise surveillance zone can be realized by using two spaced-apart radar systems having overlapping detection zones.

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