Modélisation et utilisation des erreurs de pseudodistances GNSS en environnement transport pour l’amélioration des performances de localisation

Abstract : Today, the GNSS are largely present in the transport field. Currently, the scientific community aims to develop transport applications with a high accuracy, availability and integrity. These systems offer a continuous positioning service. Performances are defined by the system parameters but also by signal environment propagation. The atmosphere propagation characteristics are well known. However, it is more difficult to anticipate and analyze the impact of the propagation environment close to the antenna which can be composed, for instance, of urban obstacles or vegetation.Since several years, the LEOST and the LAGIS research axes are driven by the understanding of the propagation environment and its use as supplementary information to help the GNSS receiver to be more pertinent. This approach aims to reduce the number of sensors in the localisation system, and consequently reduces its complexity and cost. The work performed in this thesis is devoted to provide more realistic pseudorange error models and reception channel model. After, a step of observation error characterization, several pseudorange error models have been proposed. These models are the finite gaussian mixture model and the Dirichlet process mixture. The model parameters are then estimated jointly with the state vector containing position by using adapted filtering solution like the Rao-Blackwellized particle filter. The noise model evolution allows adapting to an urban environment and consequently providing a position more accurate.Each step of this work has been tested and evaluated on simulation data and real data.
Document type :
Theses
Complete list of metadatas

Cited literature [65 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00664264
Contributor : Abes Star <>
Submitted on : Monday, January 30, 2012 - 11:15:10 AM
Last modification on : Thursday, February 21, 2019 - 10:34:08 AM
Long-term archiving on : Wednesday, December 14, 2016 - 2:34:08 AM

File

Viandier_Nicolas_DLE.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00664264, version 1

Collections

Citation

Nicolas Viandier. Modélisation et utilisation des erreurs de pseudodistances GNSS en environnement transport pour l’amélioration des performances de localisation. Autre. Ecole Centrale de Lille, 2011. Français. ⟨NNT : 2011ECLI0006⟩. ⟨tel-00664264⟩

Share

Metrics

Record views

2834

Files downloads

5024