Satellite-based positioning system receiver for weak signal...

Details Satellite-based positioning system receiver for weak signal... Satellite-based positioning system receiver for weak signal...

G - Physics

01

S

G01S 5/14 (2006.01) G01S 1/00 (2006.01) G01S 11/00 (2006.01)

Patent

CA 2437340

A method, device and system for determining a receiver location using weak signal satellite transmissions. The invention involves a sequence of exchanges between an aiding source and a receiver that serve to provide aiding information to the receiver so that the receiver's location may be determined in the presence of weak satellite transmissions. With the aiding information, the novel receiver detects, acquires and tracks weak satellite signals and computes position solutions from calculated pseudo ranges despite the inability to extract time synchronization date from the weak satellite signals.

L'invention concerne un procédé, un dispositif et un système permettant de déterminer la position d'un récepteur en transmission par satellite à signal faible. Une série d'échanges entre une source d'informations d'appui et un récepteur permet de fournir des informations d'appui au récepteur. Ainsi, on peut déterminer la position du récepteur en transmission par satellite à signal faible. Les informations d'appui permettent au récepteur de déceler, d'acquérir et de poursuivre des signaux faibles transmis par satellite, puis de déterminer des solutions de positionnement sur la base de pseudo-distances calculées, malgré l'impossibilité d'extraire les données de synchronisation à partir des signaux faibles transmis par satellite.

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