Location specific search for regional satellite vehicles

Details Location specific search for regional satellite vehicles Location specific search for regional satellite vehicles

G - Physics

01

S

G01S 1/00 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2726515

A position location system, method, and apparatus are disclosed. A wireless device receives a first signal and obtains an identifier indicative of a first location from the first signal. The first signal can be received from a cellular base station and the first identifier can be a mobile country code. The wireless device uses the identifier to determine the availability of signals from a regional satellite system at the first location. If signals from the regional satellite system are available at the first location, the wireless device retrieves information associated with one or more satellite vehicles in the regional satellite system. The information can include pseudo-random number codes and a Doppler search range corresponding to the first location. The wireless device receives a second signal and processes the second signal to obtain first satellite signal information. The wireless device determines its position at least partially based on the first satellite signal information.

L'invention porte sur un système, un procédé et un appareil de localisation de position. Un dispositif sans fil reçoit un premier signal et obtient un identificateur, qui indique une première localisation à partir du premier signal. Le premier signal peut être reçu d'une station de base cellulaire, et le premier identificateur peut être un code pays mobile. Le dispositif sans fil utilise l'identificateur pour déterminer la disponibilité de signaux provenant d'un système de satellites régionaux sur la première localisation. Si les signaux provenant du système de satellites régionaux sont disponibles sur la première localisation, le dispositif sans fil récupère les informations associées à un ou plusieurs véhicules satellitaires dans le système de satellites régionaux. Les informations peuvent comprendre des codes numériques pseudo-aléatoires et une gamme de recherche Doppler correspondant à la première localisation. Le dispositif sans fil reçoit un second signal et traite le second signal pour obtenir des informations sur le premier signal satellitaire. Le dispositif sans fil détermine sa position au moins en partie sur la base des informations sur le premier signal satellitaire.

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