室内可见光异步定位系统光学边界研究  

Research on optical boundary of indoor visible light asynchronous positioning system

作　　者：陈颖聪[1,2] 文尚胜 关伟鹏[4] 邓智聪 向昌明 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640 [2]佛山市南海区广工大数控装备协同创新研究院,广东佛山528225 [3]华南理工大学发光材料与器件国家重点实验室,广东广州510640 [4]华南理工大学自动化科学与工程学院,广东广州510640

出　　处：《红外与激光工程》2017年第12期124-129,共6页Infrared and Laser Engineering

基　　金：国家文化科技提升计划(GJWHKJTSXM20154464);广东省科技计划(2013B090600048);广东省应用型科技研发专项(2015B010134001);广东省扬帆计划引进创新创业团队专项(2015YT02C093);广州市科技计划项目(2013J4300021);广州市产学研协同创新重大专项(201604010006)

摘　　要：为了研究室内可见光ID定位系统中可见光分布对定位功能实现的关系,搭建可见光通信异步ID定位系统,通过模拟仿真与实验相结合的方法,得出定位系统的定位范围和传输误码率分布。实验结果表明:利用Matlab可以近似地模拟实际模型的空间光分布,在光分布的三维分布图中找出定位系统光学边界,准确地调节定位系统的定位阈值。进一步搭建了50 cm×50 cm×50 cm的定位系统原型,在光学边界范围内实现无误码率的异步通信和定位功能,而在定位边界上,信号传输的误码率迅速上升,当信噪比为25 d B时,在光学边界上会出现8 cm的信号盲区,适当增加系统的信噪比,将有效降低信号盲区的大小。The relationship of the visible light distribution and the positioning function of the indoor ID positioning system was studied. An asynchronous positioning system based on visible light communication was constructed. Through simulation and experiment, the positioning range and hit error rate of the system were measured. The result shows that, the light distribution of the actual model can be approached by the Matlab software. After that, a 50 cm×50 cm×50 cm prototyping was built. Inside the optical boundary, the communication and positioning function can be achieved. And around the optical boundary, the bit error rate of the system rose. When the SNR was 25 dB, an 8 cm signal blind zone was shown around the optical boundary. The zone can be reduced by improving the SNR of the positioning system.

关 键 词：旋转特性 大气湍流 相位屏 数值模拟 

分 类 号：TN929.12[电子电信—通信与信息系统] TN312.8[电子电信—信息与通信工程]