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http://dx.doi.org/10.9728/dcs.2014.15.1.129

Performance of Indoor Positioning using Visible Light Communication System  

Park, Young-Sik (광운대학교 전파공학과)
Hwang, Yu-Min (광운대학교 전파공학과)
Song, Yu-Chan (광운대학교 전파공학과)
Kim, Jin-Young (광운대학교 전파공학과)
Publication Information
Journal of Digital Contents Society / v.15, no.1, 2014 , pp. 129-136 More about this Journal
Abstract
Wi-Fi fingerprinting system is a very popular positioning method used in indoor spaces. The system depends on Wi-Fi Received Signal Strength (RSS) from Access Points (APs). However, the Wi-Fi RSS is changeable by multipath fading effect and interference due to walls, obstacles and people. Therefore, the Wi-Fi fingerprinting system produces low position accuracy. Also, Wi-Fi signals pass through walls. For this reason, the existing system cannot distinguish users' floor. To solve these problems, this paper proposes a LED fingerprinting system for accurate indoor positioning. The proposed system uses a received optical power from LEDs and LED-Identification (LED-ID) instead of the Wi-Fi RSS. In training phase, we record LED fingerprints in database at each place. In serving phase, we adopt a K-Nearest Neighbor (K-NN) algorithm for comparing existing data and new received data of users. We show that our technique performs in terms of CDF by computer simulation results. From simulation results, the proposed system shows that a positioning accuracy is improved by 8.6 % on average.
Keywords
LED fingerprinting; LED-ID; Indoor positioning; Visible Light Communications; K-Nearest Neighbor algorithm;
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