GNSS positioning with multipath simulation using 3D surface model in Urban Canyon

Taro Suzuki, Nobuaki Kubo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

38 Citations (Scopus)

Abstract

This paper proposes a novel global navigation satellite system (GNSS) positioning technique that can be used by vehicles or pedestrians in urban canyon environments. With the launch of new positioning satellites, the availability of the GNSS is anticipated to improve, although, owing to the serious impact of multipath signals on positioning accuracy within urban canyon environments, the increased availability of satellite positioning will not necessarily correspond to higher precision positioning. Here, we propose a technique based on multipath simulation using a 3D digital surface model (DSM) for obtaining GNSS positioning in urban canyons where there are large reflection and diffraction multipath errors. To calculate a user's position using multipath simulation, it is necessary to accurately predetermine their position, as the multipath effect is highly dependent on the surrounding obstructions. A particle filter, in which a number of hypotheses of user position are created, is used to solve this problem and allow multipath simulation to estimate the position. In the positioning process, a comparison is made between the signal-to-noise ratio (SNR) estimated by propagation loss within the 3D DSM and the observed SNR. For more correct hypotheses of a particle's position, these two values of the SNR will converge, as signal propagation will have been estimated more accurately, and such particles are given larger weights. Finally, an accurate user position can be estimated through a resampling process based on these particle weights. In order to confirm the effectiveness of this proposed technique, a static positioning test was performed in an urban canyon. The results of this assessment show that the proposed technique is effective and offers increased positioning accuracy in urban environments in which large reflection and diffraction multipath errors occur in GNSS signals.

Original languageEnglish
Title of host publication25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012, ION GNSS 2012
Pages438-447
Number of pages10
Volume1
Publication statusPublished - 2012
Externally publishedYes
Event25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012, ION GNSS 2012 - Nashville, TN, United States
Duration: 2012 Sep 172012 Sep 21

Other

Other25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012, ION GNSS 2012
CountryUnited States
CityNashville, TN
Period12/9/1712/9/21

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ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

Cite this

Suzuki, T., & Kubo, N. (2012). GNSS positioning with multipath simulation using 3D surface model in Urban Canyon. In 25th International Technical Meeting of the Satellite Division of the Institute of Navigation 2012, ION GNSS 2012 (Vol. 1, pp. 438-447)