광카메라통신의 변조방법과 읽기모드 특성 비교

Abstract

Visible light communication, as a technology of using visible light as communication carrier, has been actively researched for many years because of its high bandwidth and security characteristics. Complementary metal-oxide-semiconductor (CMOS) image sensors on the market now have higher resolution and higher processing speed than before. Compared with photon detector-based visible light communication (VLC) system, a kind of VLC system uses CMOS image sensor as the optical communication receiver. The so-called optical camera communication (OCC) system has become a hot technology in recent years due to its potential application to smartphones. Since there are different types of OCC systems, it is important to understand the OCC systems in technical viewpoints for developing applications based on OCC. In this paper, the characteristics of recent OCC systems are classified and investigated considering physical characteristics of optical source and detection device, Typical types of OCC systems are examined considering modulation methods, imaging and readout modes, and novel applications. Attracting applications of OCC systems in development are listed.