Measurement of energy potential (signal-to-noise ratio) in...

G - Physics – 01 – S

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G01S 1/00 (2006.01) H04B 17/00 (2006.01)

Patent

CA 2685324

The energy potential of a receiver receiving signals from a navigation satellite is calculated according to an algorithm which is a function of an estimate of the mean and an estimate of the variance of a correlation signal. Improving the accuracy of measuring the energy potential may be achieved by improving the variance estimate. The variance estimate may be determined from measurements of the correlation signal over long time intervals during operation of the receiver. The variance estimate may also be determined during a calibration procedure, or by mathematical modelling of the receiver.

Le potentiel d'énergie d'un récepteur recevant des signaux d'un satellite de navigation est calculé conformément à un algorithme qui est une fonction d'une estimée de la moyenne et d'une estimée de la variance d'un signal de corrélation. Il est possible d'améliorer la précision de mesure du potentiel d'énergie en améliorant l'estimée de la variance. L'estimée de la variance peut être déterminée à partir de mesures du signal de corrélation sur de longs intervalles de temps pendant le fonctionnement du récepteur. L'estimée de la variance peut également être déterminée pendant une phase d'étalonnage ou par modélisation mathématique du récepteur.

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