Development of a GPS deterministic multipath simulator for an efficient computation of the positioning errors

Abstract : Multipath is defined by echoes associated with the fields reflected by the surrounding environment. In multipath situations, the received signal is not only the direct one but also a sum of attenuated and delayed versions of the direct signal. For this reason, a multipath channel is usually characterized by a set of four parameters: the amplitude, the delay, the phase shift and the Doppler shift of each multipath. When characterizing a multipath channel, the main issue is the prediction of these parameters. In this paper, we propose a GPS multipath prediction simulator adapted to airport navigation which can predict the GPS multipath error in static and dynamic configurations. This simulator consists in a multipath generator and a GPS receiver simulator. It takes into account the 3D environment, the satellite and receiver positions. Concerning the electromagnetic modeling we show that ray methods should not be used for GPS multipath prediction if few-meters objects are present in the environment. Next, the choice of physical optics (PO) is numerically validated via comparisons with the method of moments (MoM). We also show that the computation of multiple reflections up to order 2 is sufficient. We present techniques that improve the computation efficiency of the simulator. Finally a test case is exposed.
Document type :
Conference papers
Complete list of metadatas

https://hal-enac.archives-ouvertes.fr/hal-01022159
Contributor : Laurence Porte <>
Submitted on : Tuesday, September 23, 2014 - 11:16:22 AM
Last modification on : Thursday, February 7, 2019 - 2:24:33 PM
Long-term archiving on : Wednesday, December 24, 2014 - 8:49:29 PM

File

64.pdf
Publisher files allowed on an open archive

Identifiers

  • HAL Id : hal-01022159, version 1

Citation

Adrien Chen, Alexandre Chabory, Anne-Christine Escher, Christophe Macabiau. Development of a GPS deterministic multipath simulator for an efficient computation of the positioning errors. ION GNSS 2009, 22nd International Technical Meeting of The Satellite Division of the Institute of Navigation, Sep 2009, Savannah, United States. pp 2378-2390. ⟨hal-01022159⟩

Share

Metrics

Record views

198

Files downloads

191