G - Physics – 01 – S
Patent
G - Physics
01
S
G01S 1/04 (2006.01) G01S 1/00 (2006.01)
Patent
CA 2494519
The invention relates to a global positioning receiver which receives signals from different satellites and which comprises one correlation channel, Cii, per satellite received. According to the invention, each correlator channel Cii comprises: a phase and quadrature correlation channel (12) for correlation between the received signal (Sr) and two respective local quadrature carriers (sine, cosine) that are generated by a digitally-controlled carrier osciallator (OPi)(NCOp); a code correlation channel (16) for code correlation of the output signals, I, Q, from the carrier correlation channel with the local codes (Cp¿i?,¿??¿i?) supplied by a digital generator of local codes OCi; and an integrator (20) which, for each local code, supplies output signals, I¿c? Q¿c, ?from correlator channel Cii of the satellite received, c denoting each of the local codes. For each channel used to correlate the signal received from a satellite, the inventive receiver comprises as many additional correlator channels as there are additional received satellites and the local point code of the received satellite is correlated with the local codes of other additional satellites. The invention can be used for EGNOS (RIMS), WAAS, GALILEO ground stations.
L'invention concerne un récepteur de positionnement par satellite recevant des signaux de différents satellites, comportant un canal de corrélation Cii par satellite reçu, chaque canal corrélateur Cii ayant: une voie de corrélation en phase et en quadrature (12) entre le signal reçu (Sr) et deux respectives porteuses locales en quadrature (sinus, cosinus) générées par un oscillateur à commande numérique de porteuse (OPi) (NCOp); une voie de corrélation de code (16) à partir des signaux I, Q en sortie de la voie de corrélation de porteuse avec les codes locaux fournis (Cpi, .DELTA.i) par un générateur numérique de codes locaux OCi; un intégrateur (20) pour fournir, pour chaque code local, des signaux Ic Qc en sortie du canal corrélateur Cii du satellite reçu, c désignant chacun des codes locaux, Le récepteur selon l'invention comporte, pour chaque canal corrélateur de signal reçu d'un satellite, autant de canaux corrélateurs supplémentaires que de satellites supplémentaires reçus, et l'on corrèle le code local ponctuel du satellite reçu avec les codes locaux des autres satellites supplémentaires.
Robic
Thales
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