Implementation of Visual Light Communication Testbed Based on DCO-OFDM 


Vol. 45,  No. 1, pp. 117-128, Jan.  2020
10.7840/kics.2020.45.1.117


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  Abstract

Visual Light Communication (VLC) is a next-generation communication technology that has high transmission speed with a wide spectrum through visual light and compared to RF communications, it has lower power consumption and less regulated for use. If the benefit of OFDM which lower inter-symbolic interference(ISI) in radio communication using multi-carrier is applied to VLC system, it has possibility to reduce interference of multi pass and ISI. However, OFDM has disadvantages of being vulnerable to maximum Peak to Average Power Ratio (PAPR), phase noise and frequency offset. PAPR can be changed by adjusting the number of sub carriers and modulation order. And in OFDM system using optics, PAPR can be reduced by using linear scaling techniques combined with DC biasing. In this paper, the test bed was implemented to overcome the shortcomings of the OFDM-based VLC system using linear scaling technique, time synchronization using synchronizing symbol and channel estimation using pilot symbol. The characteristics and actual performance of the VLC system based on DCO-OFDM were verified through the test bed, and the effects of the variation in modulation frequency, distance, and power gain on bit error rate(BER) were verified by the experimental results.

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  Cite this article

[IEEE Style]

D. S. Kang, S. Lee, J. S. Kim, K. W. Choi, "Implementation of Visual Light Communication Testbed Based on DCO-OFDM," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 1, pp. 117-128, 2020. DOI: 10.7840/kics.2020.45.1.117.

[ACM Style]

Dong Soo Kang, Song Lee, Ji Su Kim, and Kae Won Choi. 2020. Implementation of Visual Light Communication Testbed Based on DCO-OFDM. The Journal of Korean Institute of Communications and Information Sciences, 45, 1, (2020), 117-128. DOI: 10.7840/kics.2020.45.1.117.

[KICS Style]

Dong Soo Kang, Song Lee, Ji Su Kim, Kae Won Choi, "Implementation of Visual Light Communication Testbed Based on DCO-OFDM," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 1, pp. 117-128, 1. 2020. (https://doi.org/10.7840/kics.2020.45.1.117)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880