一种基于全向指纹库的WiFi室内定位方法

doi:10.13474/j.cnki.11-2246.2018.0038

测绘通报 ›› 2018, Vol. 0 ›› Issue (2): 25-29.doi: 10.13474/j.cnki.11-2246.2018.0038

一种基于全向指纹库的WiFi室内定位方法

毕京学, 汪云甲, 曹鸿基, 王永康

中国矿业大学环境与测绘学院, 江苏徐州 221116

收稿日期:2017-08-05 出版日期:2018-02-25 发布日期:2018-03-06
通讯作者: 汪云甲。E-mail:wyj4139@cumt.edu.cn E-mail:wyj4139@cumt.edu.cn
作者简介:毕京学(1991-),男,博士生,研究方向为室内外无缝定位。E-mail:bjx1050@163.com
基金资助:
国家重点研发计划（2016YFB0502102）；江苏省普通高校学术学位研究生创新计划（KYLX16_0544）

A Method of WiFi Indoor Positioning Based on Omnidirectional Fingerprint Database

BI Jingxue, WANG Yunjia, CAO Hongji, WANG Yongkang

School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China

Received:2017-08-05 Online:2018-02-25 Published:2018-03-06

摘要/Abstract

摘要：

WiFi室内定位技术是导航与位置服务领域的研究热点。室内环境下WiFi信号衰减受人体遮蔽影响较大，本文考虑了用户朝向引起的信号强度差异，提出了一种基于全向指纹库的WiFi室内定位方法。试验结果表明，该方法定位精度高于基于方向识别的指纹定位方法，当K取4时，平均定位误差为1.44 m，定位精度优于1 m的置信概率为54%，优于2 m的置信概率为88%。

关键词: 室内定位, WiFi, 用户朝向, 全向指纹库, 方向识别

Abstract:

WiFi indoor positioning technology is an attractive research topic in the domain of navigation and location service.Human body has a great influence on WiFi signal attenuation in indoor environment.In this paper,we propose a method of WKNN positioning based on omnidirectional fingerprint database considering signal strength variations caused by user's orientation.The experimental results show that the proposed method has a better performance than fingerprinting localization based on orientation recognition.When the value of K is 4,the mean localization error is 1.44 m,and the confidential probability with 1 m is almost 54%,the confidential probability with 2 m is almost 88%.

Key words: indoor positioning, wireless fidelity, user's orientation, omnidirectional fingerprint database, orientation recognition

中图分类号:

P228

毕京学, 汪云甲, 曹鸿基, 王永康. 一种基于全向指纹库的WiFi室内定位方法[J]. 测绘通报, 2018, 0(2): 25-29.

BI Jingxue, WANG Yunjia, CAO Hongji, WANG Yongkang. A Method of WiFi Indoor Positioning Based on Omnidirectional Fingerprint Database[J]. 测绘通报, 2018, 0(2): 25-29.

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一种基于全向指纹库的WiFi室内定位方法

A Method of WiFi Indoor Positioning Based on Omnidirectional Fingerprint Database

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