基于PWM的室内LED可见光定位系统设计  

Design of Indoor LED Visible Light Positioning System Based on PWM

作　　者：杨世权 张谦述 胡玥 YANG Shiquan;ZHANG Qianshu;HU Yue(School of Electronic Information Engineering,China West Normal University,Nanchong Sichuan 637000,China)

机构地区：[1]西华师范大学电子信息工程学院

出　　处：《重庆科技学院学报（自然科学版）》2019年第5期66-71,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：西华师范大学英才科研基金项目“场致折射率改变调控液晶光波导光学特性及其应用研究”(17YC056)

摘　　要：针对室内可见光定位的信源在空间传输中抗干扰能力差、易失真,且不易实现编码与解码等问题,提出了利用脉宽对LED光源的ID进行编码传输、基于RSSI来估测收发端投影距离的三灯定位方法。根据RSSI拟合出测距函数模型,以此估测收发两端投影距离,然后通过三边算法来进行定位。在80 cm×80 cm×80 cm的空间中进行了实验。结果显示,其定位最大误差为3.7 cm,最小误差仅1.42 cm。Aiming at the problems of poor anti-interference ability,distortion and difficulty in encoding and decoding of indoor visible light source in space transmission,a three-lamp positioning method based on RSSI to estimate projection distance of transmitter and receiver is proposed,which uses pulse width to encode and transmit ID of LED light source.According to RSSI,the ranging function model is fitted to estimate the projection distance between the transmitter and the receiver,and then the location is carried out by trilateral algorithm.Experiments are carried out in the scene of 80 cm×80 cm×80 cm.The maximum positioning error is 3.7 cm,and the minimum positioning error is only 1.42 cm.

关 键 词：光波通信 室内定位 三边算法 PWM RSSI LED 

分 类 号：TN929.1[电子电信—通信与信息系统]