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Systèmes de fusion pour la segmentation hors-ligne de signaux GPS multi-porteuses

Abstract : The GPS (Global Positioning System) allows any user to calculate his position on Earth. A receiver measures the transit time of electromagnetic waves emitted by a satellites constellation. The transit time is estimated with discriminator values calculate with correlation of codes contained in the signals and generated by the receiver. Actually, the GPS signal is emitted on a single carrier frequency for a civil use. With the future GPS evolution, as well as the future European system Galileo, several frequencies and so several discriminator measurements will be available. The purpose of this thesis is the study and the implementation of fusion methods for off-line segmentation of code discriminators. In this context, we examine several bayesian segmentation approaches. We propose a first hybrid fusion technique that permits to determine a stationary change on several signals. The second off-line fusion method permits to determine the linear multi-changes on a multi-carrier GPS signals. This method is based on the minimisation of a penalized contrast function. These methods are evaluated for the estimation of the distance between a satellite and a receiver, and for the position calculation of a receiver, on real data, every millisecond.
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https://tel.archives-ouvertes.fr/tel-00139226
Contributor : Stanislas Boutoille <>
Submitted on : Monday, September 17, 2007 - 10:43:27 AM
Last modification on : Wednesday, January 6, 2021 - 8:44:16 AM
Long-term archiving on: : Thursday, September 23, 2010 - 5:04:53 PM

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  • HAL Id : tel-00139226, version 3

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Stanislas Boutoille. Systèmes de fusion pour la segmentation hors-ligne de signaux GPS multi-porteuses. Traitement du signal et de l'image [eess.SP]. Université du Littoral Côte d'Opale, 2007. Français. ⟨tel-00139226v3⟩

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