An introduction to ray tracing
An introduction to ray tracing
Optical interference produced by artificial light
Wireless Networks
Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Wireless Infrared Communications
Wireless Infrared Communications
Wireless Personal Communications: An International Journal
Performance evaluation of visible-light wireless communication system using white LED lightings
ISCC '04 Proceedings of the Ninth International Symposium on Computers and Communications 2004 Volume 2 (ISCC"04) - Volume 02
Integrated system of white LED visible-light communication and power-line communication
IEEE Transactions on Consumer Electronics
Fundamental analysis for visible-light communication system using LED lights
IEEE Transactions on Consumer Electronics
A novel LED/detector integrated circuit
ACELAE'11 Proceedings of the 10th WSEAS international conference on communications, electrical & computer engineering, and 9th WSEAS international conference on Applied electromagnetics, wireless and optical communications
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White LEDs were invented the 1990's. Since then they have been extensively researched and applied in various ways. Compared with conventional lighting devices, the white LED has lower power consumption, lower voltage requirements, longer lifetime, smaller size, faster response, and cooler operation. The white LED will eventually replace incandescent or fluorescent lights in offices and homes. We have proposed an indoor visible light wireless communication system that utilizes multiple white LED lighting equipment. In this system, the equipment is used not only for illuminating rooms but also for an optical wireless communication system. The system has significantly higher power levels than infrared wireless communication systems, since it also functions as the main lighting equipment. One problem is we tend to install many lighting sources on a ceiling in order to illuminate the room as evenly as possible. While the number of sources permits site diversity transmission over LOS links, the optical path difference between the multiple sources triggers intersymbol interference (ISI), which significantly degrades system performance. This paper overcomes the ISI problem by proposing an adaptive equalization system. We elucidate the most effective training sequence interval for channel estimation in a mobile environment. And we show that the adaptive equalization system with the effectual interval alleviates the influence of shadowing.