摘要
基于发光二极管(LED)的可见光通信已经成为研究的热点.在分析LED光源辐射特性以及传输模型的基础上,设计了一种利用白色LED的实时可见光通信系统.该系统物理层数据速率为50 Mbps,实际IP层传输速率为48.5 Mbps,系统采用低复杂度和低成本的OOK调制方式实现.在ISO组织规定的普通室内光照度304 lx的条件下,通过视频传输对系统性能进行测试.测试结果表明,在双极性OOK调制方式下,扩展LED调制带宽可达到18 MHz,最大物理层数据速率可达到50Mbps.并且传输距离在3 m之内能够实现图像无马赛克流畅地传输,当接收信噪比为SNR≥12 d B时,误比特率为10-9量级.因此,该可见光通信系统可以进行实时高清视频传输.
Visible light communication based on light emitting diodes （LEDs） has become a hotspot in research. On the basis of analyzing the radiation characteristics and transmission model of LED light source, we design a real- time visible light communication system using white LED. The system physical layer data rate of 50 Mbps, the actual IP layer transfer rate of 48.5 Mbps, and the system uses low complexity and low cost OOK modulation to achieve. The performance of the system is tested by video transmission under the conditions of a general indoor light of 304 lx specified by the ISO organization. The test results show that in the bipolar OOK modulation mode, the extended LED modulation bandwidth can reach 18 MHz; the maximum physical layer data rate can reach 50 Mbps. And the transmission distance within 3 m to achieve the image without mosaic smooth transmission, when the received signal to noise ratio SNR ≥ 12 dB, the bit error rate of 10^-9 magnitude. Thus, the visible light communication system can perform real-time HD video transmission.
作者
张永棠
肖雪
ZHANG Yong-tang XIAO Xue(Department of Computer Science and Technology, Guangdong Neusoft Institute, Foshan, Guangdong 528225, China Institute of Cooperative Sensing and Advanced Computing Technology, Nanchang Technology Institute, Nancbang, Jiangxi 330003 China)
出处
《伊犁师范学院学报（自然科学版）》
2017年第3期73-77,共5页
Journal of Yili Normal University：Natural Science Edition
基金
国家自然科学基金项目(61363047)
江西省科学技术创新项目(GJJ12255)
广东省佛山市科技创新项目(2016AG100382)
关键词
可见光通信
信道带宽
实时传输
发光二极管
无线网络
Visible optical communication
Channel bandwidth
Real-time transmission
Light-emitting diode
Wireless network
