Processing of radionavigation signals using a wide-lane...

G - Physics – 01 – S

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

Patent

CA 2736917

The invention relates to a method for processing radionavigation signals from satellites broadcasting radionavigation signals at two different frequencies, said method including: receiving the signals for each satellite; for each satellite, taking undifferentiated code and phase measures (10); determining wide-lane ambiguities in a consistent manner on all the satellites (12, 13, 14) using wide-lane biases associated with the satellites and received from a reference system; and geo-positioning the receiver using the code and phase measures and the consistent wide-lane ambiguities (16, 18). The geo-positioning comprises, for each satellite, determining (16) a pseudo-distance using an iono-free combination of the code measures and of the difference in the phase measures, compensated for by the wide-lane ambiguity, said iono-free combination being noise-optimised. In order to determine the pseudo-distance, satellite clock values associated with the iono-free combination are received from the reference system.

Un procédé de traitement de signaux de radionavigation provenant de satellites diffusant des signaux de radionavigation sur au moins deux fréquences distinctes, comprend - réception des signaux pour chaque satellite, réalisation, pour chaque satellite, de mesures non différentiées de code et de phase (10), détermination d'ambiguïtés widelane de manière cohérente sur l'ensemble de satellites (12, 13, 14) en utilisant des biais widelane associés aux satellites, reçus d'un système de référence, et géopositionnement du récepteur à l'aide des mesures de code et de phase et des ambiguïtés widelane cohérentes (16, 18). Le géopositionnement comprend, pour chaque satellite, la détermination (16) d'une pseudo-distance au moyen d'une combinaison iono-free des mesures de code et de la différence des mesures phase, compensée de l'ambiguïté widelane, cette combinaison iono-free étant optimisée en bruit. Pour déterminer la pseudo- distance, des valeurs d'horloge de satellite associées à la combinaison iono-free sont reçus du système de référence.

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