Real-time propagation measurement system and scattering object identification by 3D visualization by using VRML for ETC system

  • Authors:

  • Minseok Kim;Jun-ichi Takada;Tetsuo Ando;Ryuji Soma

  • Affiliations:

  • Graduate School of Engineering, Tokyo Institute of Technology, Tokyo, Japan;Graduate School of Engineering, Tokyo Institute of Technology, Tokyo, Japan;Nippon Expressway Research Institute Company Limited, Machida-shi, Tokyo, Japan;Nippon Expressway Research Institute Company Limited, Machida-shi, Tokyo, Japan

  • Venue:
  • EURASIP Journal on Wireless Communications and Networking - Special issue on wireless access in vehicular environments
  • Year:
  • 2009

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Abstract

In the early deployment of electric toll collecting (ETC) system, multipath interference has caused the malfunction of the system. Therefore, radio absorbers are installed in the toll gate to suppress the scattering effects. This paper presents a novel radio propagation measurement system using the beamforming with 8-elmenet antenna array to examine the power intensity distribution of the ETC gate in real time without closing the toll gates that are already open for traffic. In addition, an identification method of the individual scattering objects with 3D visualization by using virtual reality modeling language will be proposed and the validity is also demonstrated by applying to the measurement data.