A new ground-to-train communication system using free-space optics technology

H. Kotake, T. Matsuzawa, A. Shimura, S. Haruyama, M. Nakagawa

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

We propose a new ground-to-train communication system using free-space optics between a train and the ground. In the proposed system, a cylindrical concave lens spreads the incoming beam from transmitter (Laser Diode, LD) horizontally to form a wide fan-shaped beam. The fan-shaped beam is projected to a train and the width of the projected beam is equal to the length of a typical bullet-train car. This transmitter with cylindrical concave lens and a receiver (Avalanche Photo Diode, APD) are installed on a train and the ground, and the horizontally spread beam is received continuously by the corresponding receiver. The train can keep a communication link continuously to the ground thanks to this spread beam. We analyzed the performance of the proposed system by experiments. The experimental results show that a sufficient received Signal-to-Noise Ratio (SNR) can be obtained when a train is not moving; therefore, the signal can be received continuously even when the train is moving. Furthermore, in order to keep a continuous communication link even when the train vibrates or shifts vertically, the vertical spread angle of a laser beam is adjusted between 0.1 degrees and 0.5 degrees. These experimental results lead to the conclusion that this system is expected to be a Giga-bit class high speed communication technology between the train and the ground.

本文言語English
ホスト出版物のタイトルComputers in Railways X
ホスト出版物のサブタイトルComputer System Design and Operation in the Railway and Other Transit Systems
ページ683-692
ページ数10
DOI
出版ステータスPublished - 2006
イベント10th International Conference on Computer System Design and Operation in the Railway and Other Transit Systems, COMPRAIL 2006, CR06 - Prague, Czech Republic
継続期間: 2006 7月 102006 7月 12

出版物シリーズ

名前WIT Transactions on the Built Environment
88
ISSN(印刷版)1743-3509

Other

Other10th International Conference on Computer System Design and Operation in the Railway and Other Transit Systems, COMPRAIL 2006, CR06
国/地域Czech Republic
CityPrague
Period06/7/1006/7/12

ASJC Scopus subject areas

  • 建築
  • 土木構造工学
  • 建築および建設
  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 人文科学(その他)
  • 輸送
  • 安全研究
  • コンピュータ サイエンスの応用

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