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A Marginalized Likelihood Ratio Approach for detecting and estimating multipath biases on GNSS measurements

Cheng, Cheng and Tourneret, Jean-Yves and Pan, Quan and Calmettes, Vincent A Marginalized Likelihood Ratio Approach for detecting and estimating multipath biases on GNSS measurements. (2014) In: 17th International Conference on Information Fusion (FUSION 2014), 7 July 2014 - 10 July 2014 (Salamanca, Spain).

(Document in English)

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Official URL: http://ieeexplore.ieee.org/document/6915981/


In urban canyons, non-line-of-sight (NLOS) multipath interferences affect position estimation based on Global Navigation Satellite Systems (GNSS). In this paper, the effects of NLOS multipath interferences are modeled as mean value jumps appearing on the GNSS pseudo-range measurements. The Marginalized Likelihood Ratio Test (MLRT) is proposed to detect, identify and estimate the NLOS multipath biases. However, the MLRT test statistics is generally difficult to compute. In this work, we consider a Monte Carlo integration technique based on bias magnitude sampling. The Jensen inequality allows this Monte Carlo integration to be simplified. The interacting multiple model algorithm is also used to update the prior information for each bias magnitude sample. Finally, some strategies are designed for estimating and correcting the NLOS multipath biases. Simulation results show that the proposed approach can effectively improve the positioning accuracy in the presence of NLOS multipath interferences.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to IEEE editor. The definitive version is available at http://ieeexplore.ieee.org This papers appears in Proceedings of FUSION 2014. Electronic ISBN: 978-8-4901-2355-3 The original PDF of the article can be found at: http://ieeexplore.ieee.org/document/6915981/ Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
HAL Id:hal-01485020
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Northwestern Polytechnical University (CHINA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Laboratory name:
Deposited On:23 Feb 2017 16:44

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