標題: | Visible Light Communication Using Receivers of Camera Image Sensor and Solar Cell |
作者: | Liu, Yang Chen, Hung-Yu Liang, Kevin Hsu, Chin-Wei Chow, Chi-Wai Yeh, Chien-Hung 光電工程學系 光電工程研究所 Department of Photonics Institute of EO Enginerring |
關鍵字: | Free space communication;optical communications;light-emitting diode (LED) |
公開日期: | 1-二月-2016 |
摘要: | We propose an electronic label and sensor system using visible light communication (VLC). The downlink signal is transmitted by a white-light light-emitting diode (LED) lamp that can provide lighting, VLC, and energy harvesting for mobile devices. The downlink is received by a solar cell. The uplink can be captured by a surveillance camera image sensor. However, using the camera image sensor as a VLC receiver (Rx) is challenging since the data rate is limited by the frame rate and due to uneven light exposure. The rolling shutter effect of the image sensor can be used to increase the data rate. In this paper, we propose and demonstrate how to demodulate the obtained rolling shutter pattern using a second-order polynomial (SOP) extinction ratio (ER) enhancement scheme, together with iterative and modified quick adaptive thresholding schemes. The ER enhancement scheme can significantly reduce the large ER fluctuation. Experimental results show that by using the proposed SOP ER enhancement scheme, the bit error rate (BER) improvement can be up to two orders of magnitude. We also believe that the proposed electronic label and sensor system may be applicable to Internet-of-Things sensing networks for connecting a number of mobile devices. |
URI: | http://dx.doi.org/10.1109/JPHOT.2015.2507364 http://hdl.handle.net/11536/129481 |
ISSN: | 1943-0655 |
DOI: | 10.1109/JPHOT.2015.2507364 |
期刊: | IEEE PHOTONICS JOURNAL |
Volume: | 8 |
Issue: | 1 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |