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Optical Engineering

Visible light communications using predistortion signal to enhance the response of passive optical receiver
Author(s): Yang Liu; Hung-Yu Chen; Kevin Liang; Liang-Yu Wei; Chi-Wai Chow; Chien-Hung Yeh
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Paper Abstract

Traditional visible light communication (VLC) uses positive-intrinsic-negative photodiode (PD) or avalanche PD as the optical receivers (Rx). We demonstrate using a solar cell as the VLC Rx. The solar cell is flexible and low cost and converts the optical signal into an electrical signal directly without the need of external power supply. In addition to acting as the VLC passive Rx, the converted electrical signal from the solar cell can charge up the battery of the Rx nodes. Hence, the proposed scheme can be a promising candidate for the future Internet of Things network. However, a solar cell acting as a VLC Rx is very challenging, since the response of the solar cell is limited. Here, we propose and demonstrate using predistortion to significantly enhance the solar cell Rx response for the first time up to the authors’ knowledge. Experimental results show that the response of the solar cell Rx is significantly enhanced; and the original 2-kHz detection bandwidth of the solar cell can be enhanced by 250 times for receiving 500-kbit/s VLC signal at a transmission distance of 1 m. The operation principle, the generated voltage by the solar cell, and the maximum data rates achieved at different transmission distances are also studied.

Paper Details

Date Published: 20 January 2016
PDF: 3 pages
Opt. Eng. 55(1) 010501 doi: 10.1117/1.OE.55.1.010501
Published in: Optical Engineering Volume 55, Issue 1
Show Author Affiliations
Yang Liu, Philips Electronics Ltd. (Hong Kong)
Hung-Yu Chen, National Chiao Tung Univ. (Taiwan)
Kevin Liang, National Chiao Tung Univ. (Taiwan)
Liang-Yu Wei, Philips Electronics Ltd. (Hong Kong)
National Chiao Tung Univ. (Taiwan)
Chi-Wai Chow, National Chiao Tung Univ. (Taiwan)
Chien-Hung Yeh, Feng Chia Univ. (Taiwan)

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