GNSS reflection mitigation by 3D urban structure estimation
MARAIS ; MOREAU ; AMBELLOUIS ; RUICHEK
Type de document
COMMUNICATION ORALE SANS ACTES (COM)
Langue
anglais
Auteur
MARAIS ; MOREAU ; AMBELLOUIS ; RUICHEK
Résumé / Abstract
Most of the Intelligent Transport Systems rely on GNSS positioning information and require more and more stringent performances in order to develop new services. Unfortunately, most of the vehicles circulate in dense urban areas where the GNSS signals are affected by multipath caused by the buildings surrounding the antenna. The CAPLOC project aims to provide an innovative tool for the positioning function, relying on satellite-based technologies, GPS and EGNOS, and using video analysis to mitigate the difficulties linked to the constricted environment of reception. Indeed, the multipath induces positioning errors whose values depend on the position and elevation of the reflecting surface. The work presented here consists in computing the 3D structure of the environment in order to estimate the pseudo range errors of the reflected signals. The errors will then be used in the position calculation process to enhance accuracy. The 3D structure of the buildings is obtained by processing the images provided by two omnidirectional cameras mounted on the roof of the vehicle. Some results of the method will be presented on real images.
