| Authors |
S. Nishimoto, T. Nagura, T. Yamazato, T. Yendo, T. Fujii, H. Okada, S. Arai |
| Title |
Overlay Coding for Road-to-Vehicle Visible Light Communication using LED Array and High-Speed Camera |
| Authority |
International IEEE Conference on Intelligent Transportation Systems (ITSC), pp.1704-1709 |
| Summary |
This paper aims to improve the visible light communication system using LED array and high-speed camera by proposing what we call “overlay coding”. “Overlay coding” is a new coding method to realize a hierarchical coding, through which a high-priority data can be received even if the receiver is far from a transmitter. Conventionally, the hierarchical coding has been realized through the wavelet transform that has a limitation of number and disposition of LEDs, and as a result it does not always match with the design of the transmitters (e.g. traffic lights, etc.) used in real life. To solve the limitation
problem, we propose a more flexible way of designing the application of LEDs depending on the transmitters. In particular, overlay coding is realized through the procedures of coding and decoding. In coding, we replace one LED with a flexible number of LEDs, and the number depends on whether the data is high-priority or low-priority, then high-priority data and low-priority data are overlaid. In decoding, we first obtain the high-priority data, and then the low-priority data using retrieved high-priority data. The experimental result shows that the distance for receiving error-free data is extended from 30m to 70m in the overlay coding. |
| 年月 |
2011年10月 |
| DOI/Handle |
DOI:10.1109/ITSC.2011.6082943
|
| 開催場所 |
Washington D.C., USA |
| 研究テーマ |
可視光通信／光無線通信
高度交通システム（ＩＴＳ）
|
| 言語 |
英語 |
| 原稿/プレゼン資料 |
 /  (ローカル限定) |
