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利用LED照明和通信的双重功能,研究了一种基于照明LED室外移动光通信的电子导览系统。分析了LED照明驱动和通信调制编码、室外光信道特性、移动电子导览系统原理,讨论LED脉冲调制与照明闪烁的关系,建立嵌入式环境下的可视化电子导览地图,以图、文、声方式提供移动轨迹导向服务,实现设定区域的自助电子导览的功能。结果表明,在保证室外LED正常照明的同时,可利用光照辐射区域实现景点位置信息传输,并完成对应景点信息的显示和播报,可靠实现了室外光接收目标移动路径的可视化导览,在短距离无线光通信应用中具有极大优势。
Utilizing the dual functions of LED lighting and communication, an electronic navigation system based on outdoor mobile optical communication of lighting LED is studied. The LED lighting driving and communication modulation coding, outdoor optical channel characteristics and the principle of mobile electronic navigation system are analyzed. The relationship between LED pulse modulation and lighting flashing is discussed. A visual electronic navigation map in embedded environment is established. The map, text and sound Way to provide mobile trajectory-oriented services to achieve the set area of self-service electronic navigation features. The results show that, while ensuring the normal illumination of the outdoor LED, it can utilize the light radiation area to realize the information transmission of the scenic spots and display and broadcast the corresponding scenic spot information, thus realizing the visual guidance of the outdoor light receiving moving paths in a short distance Wireless optical communication applications have great advantages.