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Fusion non-linéaire appliquée aux voies pilote et données du signal GPS L2C

Abstract : The new GPS L2C signal carry on the same carrier a pilot channel and a data channel. We propose non-linear fusion operators to estimate the code and phase delays that are obtained on both channels. Moreover, we propose a new tracking architecture based on open loops including joint estimators and jump detectors. Indeed, we show that the evolution of the code delay discriminator obtained with an open loop is piecewise linear. In that case, we propose a one-line change point estimate that includes a new non-linear fusion operator, using prior information on the parameter to estimate. This prior information allows decreasing the correlation between the different observations and as a consequence to decrease the mean square error of the fused measurements. The phase delay tracking open loop provides angular measurements of the received GPS signal. In this context, we have extended the fusion and Bayesian filtering techniques from linear statistics to circular statistics to estimate the phase delay. We propose a new angular fusion operator, a circular recursive filter and a change point estimator for piecewise stationary circular process. The proposed methods allow to process long time integration of the coherent discriminator values and so to improve the high rate localization of a mobile receptor compute every millisecond.
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https://tel.archives-ouvertes.fr/tel-00580417
Contributor : Monir Azmani <>
Submitted on : Monday, March 28, 2011 - 11:19:02 AM
Last modification on : Tuesday, January 5, 2021 - 1:04:02 PM
Long-term archiving on: : Saturday, December 3, 2016 - 8:43:12 PM

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  • HAL Id : tel-00580417, version 1

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Monir Azmani. Fusion non-linéaire appliquée aux voies pilote et données du signal GPS L2C. Automatique / Robotique. Université du Littoral Côte d'Opale, 2010. Français. ⟨tel-00580417⟩

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