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  • Research Article
  • Open Access

Blind Mobile Positioning in Urban Environment Based on Ray-Tracing Analysis

EURASIP Journal on Advances in Signal Processing20062006:038989

https://doi.org/10.1155/ASP/2006/38989

  • Received: 1 June 2005
  • Accepted: 13 January 2006
  • Published:

Abstract

A novel scheme is described for determining the position of an unknown mobile terminal without any prior information of transmitted signals, keeping in mind, for example, radiowave surveillance. The proposed positioning algorithm is performed by using a single base station with an array of sensors in multipath environments. It works by combining the spatial characteristics estimated from data measurement and ray-tracing (RT) analysis with highly accurate, three-dimensional terrain data. It uses two spatial parameters in particular that characterize propagation environments in which there are spatially spreading signals due to local scattering: the angle of arrival and the degree of scattering related to the angular spread of the received signals. The use of RT analysis enables site-specific positioning using only a single base station. Furthermore, our approach is a so-called blind estimator, that is, it requires no prior information about the mobile terminal such as the signal waveform. Testing of the scheme in a city of high density showed that it could achieve m position-determination accuracy more than of the time even under non-line-of-sight conditions.

Keywords

  • Urban Environment
  • Prior Information
  • Radiowave
  • Spatial Characteristic
  • Mobile Terminal

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Authors’ Affiliations

(1)
School of Integrated Design Engineering, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi Kohoku-ku, Kanagawa, Yokohama 223-8522, Japan
(2)
Wireless Communications Department, National Institute of Information and Communications Technology (NICT), 3-4 Hikarino-Oka, Kanagawa, Yokosuka 239-0847, Japan

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Copyright

© Kikuchi et al. 2006

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