一种基于大功率LED照明灯的可见光通信系统  

A visible light communication system based on high-power illumination LED lamp

作　　者：杨宇[1] 刘博[1] 张建昆[1] 陈雄斌[1] 陈弘达[1] 

机构地区：[1]中国科学院半导体研究所集成光电子学国家重点实验室,北京100083

出　　处：《光电子．激光》2011年第6期803-807,共5页Journal of Optoelectronics·Laser

基　　金：国家科技支撑计划资助项目(2009BAK43B36);中国科学院知识创新资助项目(KGCX2-YW-137)

摘　　要：基于强度调制及直接检测(IM/DD)原理,利用18×1 W大功率白光LED照明灯,以开关键控和二进制非归零码(OOK-NRZ)调制方式实现了可见光通信(VLC)系统的室内单向下行通信。为优化LED光源的布局,对光链路视线(LOS)信道损耗进行了理论分析,对LED光源建模并进行光线追迹仿真。系统采用基于TCP/IP的VLC网关驱动4盏LED光源,对36 m2室内面积的无缝覆盖,在区域内通信速率为90 kbps时误码率(BER)低于10-3,局部范围内可达到285 kbps无误码传输,实现了VLC与照明的有机结合。Based on intensity modulation and direct detection（IM/DD） principle,with a combination of on-off keying modulation and non-return to zero coding（OOK-NRZ）,an 18×1 W high power white LED lamp is utilized to realize the indoor simplex downlink visible light communication（VLC） system.A physical model of the LED under investigation was established,and both the ray-tracing simulation and the line-of-sight（LOS） analytical results were used to optimize the LED layout.A VLC system composed of 4 LED lamps driven by a single TCP/IP based VLC gateway was demonstrated,which could cover an area of 36 m2 seamlessly,which ensures that the system′s bit error rate（BER） is under 10-3 while the bit rate is 90 kbps within this area.In some extreme situations the data rate can be up to 285 kbps without any error being detected.This result exemplifies a combination of illumination and VLC.

关 键 词：可见光通信(VLC) 半导体照明 LED 开关键控(OOK) 

分 类 号：TN929.12[电子电信—通信与信息系统]