基于曲面拟合的WiFi指纹数据库更新

doi:10.11772/j.issn.1001-9081.2016.05.1192

计算机应用 ›› 2016, Vol. 36 ›› Issue (5): 1192-1195.DOI: 10.11772/j.issn.1001-9081.2016.05.1192

基于曲面拟合的WiFi指纹数据库更新

田增山, 代海鹏

重庆邮电大学移动通信技术重庆市重点实验室无线定位与空间测量研究所, 重庆 400065

收稿日期:2015-11-26 修回日期:2015-12-31 出版日期:2016-05-10 发布日期:2016-05-09
通讯作者: 代海鹏
作者简介:田增山(1968-),男,河南信阳人,教授,博士,主要研究方向:个人通信、卫星导航、无线定位、信号检测与估计;代海鹏(1989-),男,河南开封人,硕士研究生,主要研究方向:计算机网络、人工智能、软件工程。

WiFi fingerprint database updating based on surface fitting

TIAN Zengshan, DAI Haipeng

Institute of Wireless Location and Space Measurement, Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Received:2015-11-26 Revised:2015-12-31 Online:2016-05-10 Published:2016-05-09

摘要/Abstract

摘要： 针对指纹数据库更新需要大量时间和人力开销问题,提出了一种新的WiFi环境下接收信号强度(RSS)的估计方法。即采用径向基函数插值的方法,利用一部分RSS被重新测量的参考点,拟合出接收信号强度曲面,估计出邻近未知参考点RSS值,从而更新指纹数据库。大量实验证明,所提方法只需要测量四分之一的参考点,就能在定位误差为2 m范围内达到与实测数据库相同的累积误差概率,保证了较高定位精度。

关键词: WiFi定位, 无线信道, 接收信号强度, 数据库更新, 径向基插值

Abstract: To solve the problem that the fingerprint database updating requires a huge amount of time and laboring effort, a new Received Signal Strength (RSS) estimation method was proposed in WiFi environment. Part of remeasured RSS fingerprints was used to fit RSS surface by the radial basis function interpolation, the RSSs of the unknown reference points were estimated nearby the known reference points, and then the whole fingerprint database was update. The extensive experiments prove that only a quarter of the reference points need to be remeasured, the cumulative error probability will be similar with the actual database within the positioning error of 2 m, and thus the method guarantees the satisfactory positioning accuracy.

Key words: WiFi positioning, wireless channel, Received Signal Strength (RSS), database updating, radial basis interpolation

中图分类号:

TP391

田增山, 代海鹏. 基于曲面拟合的WiFi指纹数据库更新[J]. 计算机应用, 2016, 36(5): 1192-1195.

TIAN Zengshan, DAI Haipeng. WiFi fingerprint database updating based on surface fitting[J]. Journal of Computer Applications, 2016, 36(5): 1192-1195.

参考文献

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基于曲面拟合的WiFi指纹数据库更新

WiFi fingerprint database updating based on surface fitting

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