Method for correcting prediction errors of signal values...

G - Physics – 01 – S

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G01S 1/00 (2006.01) G01S 19/08 (2010.01)

Patent

CA 2741758

The present invention relates to a method for correcting the prediction of values of signal with time variation, in particular for navigation messages sent by the global satellite navigation systems, and it is characterized in that it comprises the following steps for the correction of the predictions of a parameter included in a received signal and varying in time: - estimation of the prediction error based on a first batch of values estimated during a determined time period by comparing these values to the values previously predicted for the same determined time period, - analysis of the predicted time-oriented series of prediction errors by a method for processing the signal and isolating the contributions of the systematic effects, - extrapolation of the behavior of the contributions of the systematic effects during the time period concerned and correction of the predictions using the duly extrapolated values.

La présente invention est relative à un procédé de correction de prédiction de valeurs de signaux à évolution temporelle, en particulier pour des messages de navigation envoyés par les systèmes globaux de navigation par satellites, et il est caractérisé en ce qu'il comporte les étapes suivantes pour la correction des prédictions d'un paramètre compris dans un signal reçu et évoluant dans le temps : estimation de l'erreur de prédiction à partir d'un premier lot de valeurs estimées pendant un laps de temps déterminé en comparant ces valeurs aux valeurs précédemment prédites pour le même laps de temps déterminé,, analyse des séries temporelles prédites d'erreurs de prédiction par un procédé de traitement de signal et isolation des contributions des effets systématiques, extrapolation du comportement des contributions des effets systématiques pendant le laps de temps en question et correction des prédictions à l'aide des valeurs ainsi extrapolées.

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