| Presentation | 2005-05-23 Experimental Investigation of Modulation method for Visible-Light Communications Hidemitsu SUGIYAMA, Shinichiro HARUYAMA, Masao NAKAGAWA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | An indoor visible-light communication system utilizing LED light is proposed. However, the performance of each modulation method is not clarified. In this paper, we clarify the performance of modulation method; the effect of background light, through experiments. In addition, we propose new modulation methods, Inverted-Pulse Position Modulation (I-PPM) and Subcarrier-Inverted-Pulse Position Modulation (SC-I-PPM), that provide superior LED brightness for visible-light communications. Experimental results show that subcarrier modulation is free from the influence of background light and our new modulation methods afford the brightest LED light. I-4PPM enables LED to light three times as luminous as conventional 4PPM, and SC-I-4PPM enables LED to light seven times as luminous as conventional SC-4PPM. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Visible-Light Communication / Optical Wireless Communication / LED / Modulation method / PPM |
| Paper # | OCS2005-19 |
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| Conference Information | |
| Committee | OCS |
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| Conference Date | 2005/5/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Optical Communication Systems (OCS) |
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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 Modulation method for Visible-Light Communications |
| Sub Title (in English) | |
| Keyword(1) | Visible-Light Communication |
| Keyword(2) | Optical Wireless Communication |
| Keyword(3) | LED |
| Keyword(4) | Modulation method |
| Keyword(5) | PPM |
| 1st Author's Name | Hidemitsu SUGIYAMA |
| 1st Author's Affiliation | Department of Information and Computer Science, Keio University() |
| 2nd Author's Name | Shinichiro HARUYAMA |
| 2nd Author's Affiliation | Department of Information and Computer Science, Keio University |
| 3rd Author's Name | Masao NAKAGAWA |
| 3rd Author's Affiliation | Department of Information and Computer Science, Keio University |
| Date | 2005-05-23 |
| Paper # | OCS2005-19 |
| Volume (vol) | vol.105 |
| Number (no) | 76 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |