解决CDMA同步问题的可见光定位算法  

A visible light positioning algorithm for solving CDMA synchronization problem

作　　者：马玲芳 侯杨阳 MA Lingfang;HOU Yangyang(School of Physics and Information Engineering,Jiangsu Second Normal University,Nanjing 210013,China)

机构地区：[1]江苏第二师范学院物理与信息工程学院,南京210013

出　　处：《光学技术》2024年第1期65-70,共6页Optical Technique

摘　　要：为克服时分复用技术中需要时钟同步和频分复用系统不够灵活的问题,提出了一种基于码分复用技术的高精度可见光定位算法。算法在异步场景下实现了码元同步和可见光定位的过程,仿真结果表明,在覆盖房间80%以上的区域时,算法的平均定位误差为6.9cm,最大定位误差为11cm,适用于绝大多数室内基于位置信息的服务。此外,分析了系统定位精度与接收机视场角及接收机离地高度的关系。发现在一定范围内,接收机视场角越大,系统的定位性能越差;接收机的离地高度越大,系统的定位性能越好。In order to overcome the issues of clock synchronization required in time division multiplexing(TDM)technology and the inflexibility of frequency division multiplexing(FDM)systems,an accurate visible light localization algorithm based on code division multiplexing is proposed.The algorithm realized symbol synchronization in asynchronous conditions and performs visible light positioning.The Simulation results show that when covering more than 80%of the area of a room,the average positioning error of the algorithm is 6.9cm,and the maximum positioning error is about 11cm,which is suitable for most indoor location-based services.In addition,the relationship between the positioning accuracy of the system and the field of view of the receiver and the height of the receiver above the ground is analyzed.It is found that in a certain range,the larger the field of view of the receiver,the poorer the positioning performance of the system;while the larger the height of the receiver above the ground,the better the positioning performance of the system.

关 键 词：应用光学电子学 码分复用 可见光通信 室内定位技术 码元同步 

分 类 号：TN929.12[电子电信—通信与信息系统]