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http://dx.doi.org/10.5916/jkosme.2015.39.1.63

Performance Investigation of Visible Light Communication Using Super Bright White LED and Fresnel Lens  

Kim, Min-Soo (Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Sohn, Kyung-Rak (Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.39, no.1, 2015 , pp. 63-67 More about this Journal
Abstract
White light-emitting diode (WLED) is growing interest in using both illumination and communications. This paper reports visible light communication (VLC) composed of a super bright white light-emitting diode, low cost commercial photo-diode and a Fresnel lens. LED driver is consisted of the power MOSFET and MOSFET driver that switches the LED on and off. The modulation bandwidth of the LED used was determined to be 8 MHz. However, it was possible to communicate up to 1 Mbps under illumination of 500 lx because of the weak signal power and a low spectral sensitivity of the SHF213 as a PIN photodiode. In order to enhance the system bandwidth, the LED light was focused on the PIN photodiode by use of the Fresnel lens. As a result of that, visible light link was operated up to modulation bandwidth of the LED. The signal to noise ratio can be improved by 40 dB using an optical concentration at the receiver.
Keywords
Visible light communication; White light-emitting diode; Fresnel lens; PIN photodiode;
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Times Cited By KSCI : 3  (Citation Analysis)
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