標題: Visible light communication using mobile-phone camera with data rate higher than frame rate
作者: Chow, Chi-Wai
Chen, Chung-Yen
Chen, Shih-Hao
光電工程學系
光電工程研究所
Department of Photonics
Institute of EO Enginerring
公開日期: 5-Oct-2015
摘要: Complementary Metal-Oxide-Semiconductor (CMOS) image sensors are widely used in mobile-phone and cameras. Hence, it is attractive if these image sensors can be used as the visible light communication (VLC) receivers (Rxs). However, using these CMOS image sensors are challenging. In this work, we propose and demonstrate a VLC link using mobile-phone camera with data rate higher than frame rate of the CMOS image sensor. We first discuss and analyze the features of using CMOS image sensor as VLC Rx, including the rolling shutter effect, overlapping of exposure time of each row of pixels, frame-to-frame processing time gap, and also the image sensor "blooming" effect. Then, we describe the procedure of synchronization and demodulation. This includes file format conversion, grayscale conversion, column matrix selection avoiding blooming, polynomial fitting for threshold location. Finally, the evaluation of bit-error-rate (BER) is performed satisfying the forward error correction (FEC) limit. (C)2015 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.23.026080
http://hdl.handle.net/11536/129416
ISSN: 1094-4087
DOI: 10.1364/OE.23.026080
期刊: OPTICS EXPRESS
Volume: 23
Issue: 20
起始頁: 26080
結束頁: 26085
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