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http://dx.doi.org/10.9717/kmms.2019.22.2.186

An Encoding Scheme Considering Diffused Lights In a Visual Light Communication System  

Eun, Seongbae (Dept. of Information Communication Eng., Hannam University)
Kim, Dong kyu (Dept. of Information Communication Eng., Hannam University)
Cha, Shin (Dept. of Information Communication Eng., Hannam University)
Publication Information
Journal of Korea Multimedia Society / v.22, no.2, 2019 , pp. 186-193 More about this Journal
Abstract
Visible light communication technology is being studied and developed in various ways due to advantages such as high transmission speed, excellent positioning and higher security. However, existing visible light communication systems have difficulties in entering the market because they use special transmitters and receivers. We will overcome the difficulty if we develope a VLC system that uses a conventional LED light as a transmitter and a smartphone camera as a receiver. What matters is that LED lights include a scatter filter to prevent glareness for human eyes, but the existing VLC(Visual Light Communication) method can not be applied. In this paper, we propose a method to encode data with On / Off patterns of LEDs in the lighting with $M{\times}N$ LEDs. We defined parameters like L-off-able and K-seperated to facilitate the recognition of On / Off patterns in the diffused Lights. We conducted experiments using an LED lighting and smart phones to determine the parameter values. Also, the maximum transmission rate of our encoding technique is mathematically presented. Our encoding scheme can be applied to indoor and outdoor positioning applications or settlement of commercial transactions.
Keywords
Visual Light Communication; Diffused LED Light; On/OFF Pattern; Encoding Scheme; L-off-able; K-seperated;
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Times Cited By KSCI : 2  (Citation Analysis)
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