Pulse doppler coherent method and system for snr enhancement

G - Physics – 01 – S

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G01S 13/22 (2006.01)

Patent

CA 2626284

A method and system for SNR enhancement in pulse-Doppler coherent target detection. In accordance with the method of the invention, complex signals are obtained for each of two or more sub-intervals of the time-on-target interval, allowing simultaneous rang and Doppler measurements. A coherent integration is then performed on the signals to generate complex-valued folded matrices. The folded matrices are unfolded and target detection is then performed in a process involving one or more of the unfolded matrices. A pulse-Doppler coherent system is also provided configured for target detection by the method of the invention.

La présente invention concerne un procédé et un système permettant d'améliorer le rapport signal-bruit dans une détection de cible cohérente par Doppler à impulsions. Selon le procédé de l'invention, des signaux complexes sont obtenus pour chacun de deux sous-intervalles (ou plus) de l'intervalle heure sur objectif, permettant des mesures Doppler simultanées. Une intégration cohérente est ensuite effectuée à partir des signaux pour générer des matrices repliées à valeurs complexes. Les matrices repliées sont dépliées et la détection de cible est réalisée selon un processus impliquant l'une ou plusieurs des matrices dépliées. L'invention propose également un système cohérent à Doppler à impulsions, configuré pour la détection de cible selon le procédé sus-décrit.

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