| Presentation | 2006-04-21 Experimental Investigation of Ground-to-Train Communication System using Free-Space Optics Technology Hideaki KOTAKE, Tetsushi MATSUZAWA, Akihiro SHIMURA, Shinichiro HARUYAMA, Masao NAKAGAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | 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 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 APD are installed at a train and the ground, and the horizontally spread beam is received continuously by 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 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 as a Giga-bit class high speed communication technology between the train and the ground. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Optical Wireless Communication / Train Communication / Visible Light Communication / Spread Beam |
| Paper # | RCS2006-17 |
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| Committee | RCS |
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| Conference Date | 2006/4/14(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Experimental Investigation of Ground-to-Train Communication System using Free-Space Optics Technology |
| Sub Title (in English) | |
| Keyword(1) | Optical Wireless Communication |
| Keyword(2) | Train Communication |
| Keyword(3) | Visible Light Communication |
| Keyword(4) | Spread Beam |
| 1st Author's Name | Hideaki KOTAKE |
| 1st Author's Affiliation | Department of Infomation and Computer Science, Keio University() |
| 2nd Author's Name | Tetsushi MATSUZAWA |
| 2nd Author's Affiliation | Department of Infomation and Computer Science, Keio University |
| 3rd Author's Name | Akihiro SHIMURA |
| 3rd Author's Affiliation | Department of Infomation and Computer Science, Keio University |
| 4th Author's Name | Shinichiro HARUYAMA |
| 4th Author's Affiliation | Department of Infomation and Computer Science, Keio University |
| 5th Author's Name | Masao NAKAGAWA |
| 5th Author's Affiliation | Department of Infomation and Computer Science, Keio University |
| Date | 2006-04-21 |
| Paper # | RCS2006-17 |
| Volume (vol) | vol.106 |
| Number (no) | 25 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |