WiFi室内定位测站布设优化的DOP数值分析  

DOP Numerical Analysis of WiFi Indoor Positioning Station Setting Optimization

作　　者：姚海云 舒红[1] 孙红星[1] 汪善华[2] 曾坤 YAO Haiyun;SHU Hong;SUN Hongxing;WANG Shanhua;ZENG Kun(State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China;Shenzhen Cadastral Surveying and Mapping Brigade,Shenzhen 518034,China;Wuhan Yishi Tianhui Technology Co.,Ltd.,Wuhan 430200,China)

机构地区：[1]武汉大学测绘遥感信息工程国家重点实验室,湖北武汉430079 [2]深圳市地籍测绘大队,广东深圳518034 [3]武汉益士天慧科技有限公司,湖北武汉430200

出　　处：《测绘地理信息》2022年第2期34-38,共5页Journal of Geomatics

基　　金：国家重点研发计划(2016YFB0502204);武汉大学测绘遥感信息工程国家重点实验室开放研究基金(17D02)。

摘　　要：针对WiFi不同测站布设对最终定位精度的影响,给出了精度衰减因子(dilution of precision,DOP)数值分析模型,通过改变待测节点的位置计算获得DOP分布值,综合分析发现一些定位源结构特征,启发了定位源的优化布设。设计了5种实验方案进行仿真实验,结果表明,在测站节点布设在不同平面且不靠近墙角时,测站节点之间构成的几何体体积越大,得到的DOP值越小,这意味在测距精度一定的情况下,通过优化测站布设,会很好地提高定位精度。Aiming at the influence of Wi-Fi different station setting on the positioning accuracy,a numerical analysis model of dilution of precision(DOP)is given.By changing the position of the node to be tested,the DOP distribution is obtained by numerical calculation.The positioning source structure features have inspired the optimization of the positioning source.Five experimental schemes are designed for simulation experiments.The results show that when the station nodes are arranged in different planes and are not close to the corner,the larger the geometric volume formed between the station nodes,the smaller the DOP value obtained,which means given that ranging accuracy is constant,the positioning accuracy will be improved by optimizing the station setting.

关 键 词：室内定位 WIFI 测站布设 DOP数值分析 

分 类 号：P228[天文地球—大地测量学与测量工程]