비가시거리 광학 카메라 통신시스템 성능평가

Abstract

In this paper, we investigate the impact of various parameters on the performance of a none-line-of-sight visible light communication (VLC) system using a CMOS camera. In this system, the camera does not record data from LEDs directly but data is recorded from the reflective surface (the wall). By this method, the communication distance of NLOS system is longer than that of LOS system because the size of the reflective surface is much bigger than size of LEDs. Through experiments, we demonstrate that the performance of NLOS VLC system can be achieved 3.1x10-5 BER when the distance between the camera and the reflective surface is 60 cm and the data is modulated at 4.5 kHz.