Open AccessVisible light communication using dual camera on one smartphone
Author(s) -
Yiqin Xu,
Jinxiu Hua,
Zheng Gong,
Weisong Zhao,
Z Q Zhang,
Canyu Xie,
Z T Chen,
J F Chen
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.034609
Subject(s) - monochrome , computer science , baseband , visible light communication , modulation (music) , computer vision , artificial intelligence , camera phone , keying , optics , digital camera , computer graphics (images) , telecommunications , physics , light emitting diode , bandwidth (computing) , acoustics
Dual camera is becoming increasingly prevalent among smartphone camera schemes these days. This paper demonstrates a system prototype by using the color and monochrome cameras on one smartphone simultaneously for visible light communication. To achieve this, we propose a novel dual-modulation scheme. The baseband signal is firstly modulated by color ratio modulation-color shift keying (CRM-CSK) to broadcast color ratio information that can be distinguished by the color camera. Next to it, gray level modulation (GLM) is utilized to generate CRM symbols with gray levels that can be distinguished by the monochrome camera. Our experiment shows a significant improvement in the downlink data rate of the optical camera communication (OCC) using a single light source.