移动窗式WiFi位置指纹采集生成方法  

Method of location fingerprint collection and generation based on WiFi moving window

作　　者：胡久松 胡聪崴 谷志茹[1] HU Jiusong;HU Congwei;GU Zhiru(College of Railway Transportation,Hunan University of Technology,Zhuzhou 412007,P.R.China)

机构地区：[1]湖南工业大学轨道交通学院,湖南株洲412007

出　　处：《重庆邮电大学学报（自然科学版）》2023年第5期847-853,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：湖南省自然科学青年基金项目(2020JJ5144);湖南省教育厅科学研究项目(19C0563);2022年度省市联合基金项目(20221150088)。

摘　　要：针对均值法采集WiFi位置指纹所需单点采集时间较长的问题,提出了一种移动窗式位置指纹采集生成方法。采用定长移动窗的信号丢失率计算稳态性,以提取稳态信号和过滤非稳态信号。采用变长移动窗策略计算相邻窗均值变化程度,判定采集工作是否停止。实验证明,提出的方法在保障原有精度的情况下,能节省约60%的离线数据采集时间。In order to address the issue of prolonged acquisition time associated with the average method of gathering WiFi location fingerprints,this paper proposes a method of collecting and generating such fingerprints through the use of a moving window.Specifically,the steady-state signal is extracted and the unsteady-state signal is filtered by calculating the signal loss rate of a fixed-length moving window.Moreover,the degree of change in the mean value of adjacent windows is calculated through the use of a variable-length moving window strategy to determine when acquisition should cease.Experimental results indicate that the aforementioned approach can reduce offline data acquisition time by approximately 60%while maintaining accuracy.

关 键 词：室内定位 位置指纹 移动窗 信号采集 

分 类 号：TN926[电子电信—通信与信息系统] TP393.17[电子电信—信息与通信工程]