Fast acquisition, high sensitivity gps receiver

G - Physics – 01 – S

Patent

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Details

G01S 5/14 (2006.01) G01S 1/00 (2006.01) G01S 1/04 (2006.01) G01S 5/00 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2328310

A method and apparatus of acquiring and tracking global positioning system signals with fast acquisition speed and high sensitivity is disclosed. A pseudo-random noise matching filter operation is performed on a sample of global positioning system signals to provide a current matched filter result. The current matched filter result is then accumulated with a prior matched filter result from a prior sample of global positioning system signals to produce an accumulated matched filter result. Efficient means for implementing the matched filter are disclosed.

On décrit un procédé et un appareil qui permettent de capter et de suivre des signaux du système mondial de localisation (GPS) avec une vitesse d'acquisition rapide et une grande sensibilité. Une opération de filtrage de correspondance du bruit pseudo-aléatoire est effectuée sur un échantillon de signaux du système mondial de localisation pour produire un résultat de filtre adapté du moment. Le résultat de filtre adapté actuel est ensuite ajouté à un résultat de filtre adapté antérieur provenant d'un échantillon de signaux du système mondial de localisation pour produire un résultat de filtre adapté composite. Des dispositifs efficaces de mise en oeuvre du filtre adapté sont décrits.

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