UWB人员运动定位的小波阈值去噪方法研究  

Research on wavelet threshold denoising method for UWB localization of people motion

作　　者：张冉乔 苏中[1] 刘宁[1] ZHANG Ranqiao;SU Zhong;LIU Ning(Beijing Key Laboratory of High Dynamic Navigation Technology,Beijing Information Science&Technology University,Beijing 100192,China)

机构地区：[1]北京信息科技大学高动态导航技术北京市重点实验室,北京100192

出　　处：《现代电子技术》2020年第17期34-38,共5页Modern Electronics Technique

基　　金：国家自然科学基金(61771059);高动态导航技术北京市重点实验室开放课题。

摘　　要：针对超宽带定位系统受到人员运动影响,定位精度降低的问题,提出一种超宽带人员运动定位的小波阈值去噪方法。通过研究不同的小波基函数、阈值选取规则和阈值函数对人员运动产生的定位异常影响,根据去噪效果,在启发式阈值估计准则下,确定db5小波5层分解、软阈值函数去噪为最佳去噪方法。通过实验验证表明,该小波阈值去噪方法能够削弱UWB室内人员运动定位中异常值的影响,提高定位精度与定位准确性。A wavelet threshold denoising method for ultra wide band(UWB)localization of people motion is proposed to solve the problem that UWB positioning system is affected by people movement,which may cause reduction of positioning accuracy. By studying the influence of different wavelet basis functions,threshold selection rules and threshold functions on the positioning anomalies generated by human motion,under the heuristic threshold estimation criterion,db5 wavelet 5-layer decomposition and soft threshold function denoising are regarded as the best denoising methods according to the denoising effect.The experimental verification results show that the wavelet threshold denoising method can weaken the influence of outliers in the UWB indoor human motion positioning,and improve the positioning accuracy and positioning precision.

关 键 词：超宽带定位 室内人员定位 小波变换 小波阈值去噪 小波基函数 阈值选取 

分 类 号：TN911.4-34[电子电信—通信与信息系统]