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Conference Paper: LED Traffic Light as Communication Device
Title | LED Traffic Light as Communication Device |
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Authors | |
Keywords | Transportation |
Issue Date | 1999 |
Publisher | IEEE. |
Citation | IEEE/IEEJ/JSAI International Conference on Intelligent Transportation Systems Proceedings, Tokyo, Japan, 5-8 October 1999, p. 788-793 How to Cite? |
Abstract | The visible light from an LED (light emitting diode) traffic light can be modulated and encoded with information. Hence, it can be used for the broadcasting of audio messages or any traffic or road information. Essentially all LED traffic lights can be used as communications devices. The paper focuses on the description of an audio information system made up of high brightness, visible light emitting diodes (LEDs) in which one or more LEDs are modulated and encoded with audio messages. The system also comprises a receiver combined with a speaker which is located at a distance from the LED traffic light. The receiver is designed to demodulate the optically transmitted audio information and broadcast the messages with the speaker. The optical link employs intensity modulation with direct detection. The audio information system implemented on an LED traffic light can provide the function of open space, wireless broadcasting of audio messages. |
Persistent Identifier | http://hdl.handle.net/10722/46164 |
DC Field | Value | Language |
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dc.contributor.author | Pang, GKH | en_HK |
dc.contributor.author | Kwan, TO | en_HK |
dc.contributor.author | Chan, CH | en_HK |
dc.contributor.author | Liu, HS | en_HK |
dc.date.accessioned | 2007-10-30T06:43:53Z | - |
dc.date.available | 2007-10-30T06:43:53Z | - |
dc.date.issued | 1999 | en_HK |
dc.identifier.citation | IEEE/IEEJ/JSAI International Conference on Intelligent Transportation Systems Proceedings, Tokyo, Japan, 5-8 October 1999, p. 788-793 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/46164 | - |
dc.description.abstract | The visible light from an LED (light emitting diode) traffic light can be modulated and encoded with information. Hence, it can be used for the broadcasting of audio messages or any traffic or road information. Essentially all LED traffic lights can be used as communications devices. The paper focuses on the description of an audio information system made up of high brightness, visible light emitting diodes (LEDs) in which one or more LEDs are modulated and encoded with audio messages. The system also comprises a receiver combined with a speaker which is located at a distance from the LED traffic light. The receiver is designed to demodulate the optically transmitted audio information and broadcast the messages with the speaker. The optical link employs intensity modulation with direct detection. The audio information system implemented on an LED traffic light can provide the function of open space, wireless broadcasting of audio messages. | en_HK |
dc.format.extent | 633929 bytes | - |
dc.format.extent | 4651 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | text/plain | - |
dc.language | eng | en_HK |
dc.publisher | IEEE. | en_HK |
dc.relation.ispartof | IEEE/IEEJ/JSAI International Conference on Intelligent Transportation Systems Proceedings | - |
dc.rights | ©1999 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. | - |
dc.subject | Transportation | en_HK |
dc.title | LED Traffic Light as Communication Device | en_HK |
dc.type | Conference_Paper | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1109/ITSC.1999.821161 | en_HK |
dc.identifier.hkuros | 50486 | - |