A method and radar system for coherent detection of moving...

G - Physics – 01 – S

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G01S 13/10 (2006.01) G01S 13/524 (2006.01)

Patent

CA 2683096

The present invention provides a coherent radar system based on a modification of standard non-coherent radar without Moving Target Indication. Typical radars in this class are Navigation radars which are mass produced with low cost components. These radars utilize a magnetron in the transmitter which is a random phase device. In the present invention, the received signal is extracted just prior to amplitude detection process (where phase information is lost), and digitized using an analogue to digital converter providing coherent detection based on correlation between the transmitted pulse and the received signal.

La présente invention concerne un système radar cohérent reposant sur une modification de radar non cohérent standard sans indication d'une cible en mouvement. Les radars types de cette catégorie sont des radars de navigation qui sont fabriqués en série avec des composants peu coûteux. Ces radars utilisent un magnétron dans l'émetteur qui est un dispositif à phase aléatoire. Selon cette invention, le signal reçu est extrait juste avant le processus de détection d'amplitude (au cours duquel les informations de phase sont perdues) puis numérisé au moyen d'un convertisseur analogique-numérique, ce qui permet d'obtenir une détection cohérente reposant sur une corrélation entre l'impulsion émise et le signal reçu.

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