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http://dx.doi.org/10.5515/KJKIEES.2017.28.1.10

Design and Implementation of VLID System by Back-Scattering Visible Light  

Yun, Jisu (Department of Electrical Engineering, Kookmin University)
Jang, Byung-Jun (Department of Electrical Engineering, Kookmin University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.28, no.1, 2017 , pp. 10-18 More about this Journal
Abstract
In this paper, we designed and implemented a visible light identification(VLID) system consisting of a VLID reader and a tag which backscatters incident lights from the reader. A VLID tag sends its ID to the reader by switching an LCD shutter which is located on its surface. The VLID reader consists of six LEDs and a photodiode(PD). The LEDs emit visible light and a PD located in a center position of LEDs receives backscattered light from the VLID tag. A microcontroller and a commercial liquid crystal display(LCD) shutter for 3D-TV glasses are used to implement a VLID tag. Experiments were conducted to confirm VLID system performance. We successfully demonstrated experiments to send NRZ-OOK signal of 100 bps over a distance of 35 cm at daytime. Also, we suggested the theoretical maximum transmission rate and the various methods to enhance the separation distance between a VLID reader and a tag.
Keywords
Visible Light; VLID; LCD Shutter; Reader; Tag; Backscattering; IoT;
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