OE Letters

Experimental demonstration of light sensor-based visible light communications using time shift light intensity modulation

[+] Author Affiliations
Yong-hyeon Kim, Yeon-ho Chung

Pukyong National University, Department of Information and Communications Engineering, 45 Yongso-Ro, Nam-Gu, Busan 608-787 South Korea

Opt. Eng. 55(9), 090501 (Sep 02, 2016). doi:10.1117/1.OE.55.9.090501
History: Received June 15, 2016; Accepted August 22, 2016
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Abstract.  An experimental light sensor-based indoor visible light communication (VLC) is presented. Light-emitting diodes (LEDs) primarily used for illumination are employed to transmit wireless optical data over a short distance, while a smartphone’s light sensor is used to receive the data. The light sensor in a smartphone is originally installed to function as a power saving method by adjusting the brightness of the smartphone screen. We propose an efficient and easy-to-use short range VLC based on this light sensor. To compensate for the inherent low sampling rate of the light sensor and also to avoid LED (transmitter) flickering, we propose time shift light intensity modulation. To verify the proposed light sensor VLC, experiments were conducted. The results demonstrate that the data can reliably be transmitted over the VLC link between the LEDs and the smartphone light sensor.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yong-hyeon Kim and Yeon-ho Chung
"Experimental demonstration of light sensor-based visible light communications using time shift light intensity modulation", Opt. Eng. 55(9), 090501 (Sep 02, 2016). ; http://dx.doi.org/10.1117/1.OE.55.9.090501


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