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GNSS shadow matching: Improving urban positioning accuracy using a 3d city model with optimized visibility scoring scheme

Wang, L; Groves, PD; Ziebart, MK; (2013) GNSS shadow matching: Improving urban positioning accuracy using a 3d city model with optimized visibility scoring scheme. Navigation, Journal of the Institute of Navigation , 60 (3) pp. 195-207. 10.1002/navi.38. Green open access

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Abstract

Global navigation satellite system (GNSS) positioning is widely used in land vehicle and pedestrian navigation systems. Nevertheless, in urban canyons GNSS remains inaccurate due to building blockages and reflections, especially in the cross-street direction. Shadow matching is a new technique, recently proposed for improving the cross-street positioning accuracy using a 3D model of the nearby buildings. This paper presents a number of advances in the shadow-matching algorithm. First, a positioning algorithm has been developed, interpolating between the top-scoring candidate positions. Furthermore, a new scoring scheme has been developed that accounts for signal diffraction and reflection. Finally, the efficiency of the process used to generate the grid of building boundaries used for predicting satellite visibility has been improved. Real-world GNSS data has been collected at 22 different locations in central London to provide the first comprehensive and statistical performance analysis of shadow matching. © 2013 Institute of Navigation.

Type: Article
Title: GNSS shadow matching: Improving urban positioning accuracy using a 3d city model with optimized visibility scoring scheme
Open access status: An open access version is available from UCL Discovery
DOI: 10.1002/navi.38
Publisher version: http://dx.doi.org/10.1002/navi.38
Language: English
Additional information: © 2013 Institute of Navigation. This is the peer reviewed version of the following article: Wang, L; Groves, PD; Ziebart, MK; (2013) GNSS shadow matching: Improving urban positioning accuracy using a 3d city model with optimized visibility scoring scheme. Navigation, Journal of the Institute of Navigation, 60 (3) pp. 195-207, which has been published in final form at http://dx.doi.org/10.1002/navi.38. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving: http://olabout.wiley.com/WileyCDA/Section/id-817011.html.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1406976
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