超宽带(Ultra-Wideband,UWB)技术能获得比现有无线定位技术更高的测距定位精度.本文主要讨论UWB定位技术的研究和应用,包括TOA/TDOA(Time/Time Difference of Arrival)等UWB定位方法、多径时延估计理论、非视距定位和协作式定位、多带OF...超宽带(Ultra-Wideband,UWB)技术能获得比现有无线定位技术更高的测距定位精度.本文主要讨论UWB定位技术的研究和应用,包括TOA/TDOA(Time/Time Difference of Arrival)等UWB定位方法、多径时延估计理论、非视距定位和协作式定位、多带OFDM(Orthogonal Frequency Division Multiplexing)定位和其他超宽带信号定位方式等方面,对其发展历程和现状进行了充分的叙述和分析,最后指出了仍存在的问题和值得进一步探讨的方向.展开更多
在分布式多天线的基础上,提出一种新型非视距误差消除算法,并将其应用于传统的时间到达(time of ar-rival,TOA)定位。利用含多天线的天线组,测量出导致产生非视距传播的散射体的位置,将这些散射体看作虚拟基站,测量出移动台的坐标,完成...在分布式多天线的基础上,提出一种新型非视距误差消除算法,并将其应用于传统的时间到达(time of ar-rival,TOA)定位。利用含多天线的天线组,测量出导致产生非视距传播的散射体的位置,将这些散射体看作虚拟基站,测量出移动台的坐标,完成无线定位。通过对算法的仿真结果分析表明,该算法能有效地消除非视距误差,比一些传统算法具有更高的定位精度。展开更多
In order to improve the performance of the traditional hybrid time-of-arrival（TOA）/angle-of-arrival（AOA）location algorithm in non-line-of-sight（NLOS）environments,a new hybrid TOA/AOA location estimation algorith...In order to improve the performance of the traditional hybrid time-of-arrival（TOA）/angle-of-arrival（AOA）location algorithm in non-line-of-sight（NLOS）environments,a new hybrid TOA/AOA location estimation algorithm by utilizing scatterer information is proposed.The linearized region of the mobile station（MS）is obtained according to the base station（BS）coordinates and the TOA measurements.The candidate points（CPs）of the MS are generated from this region.Then,using the measured TOA and AOA measurements,the radius of each scatterer is computed.Compared with the prior scatterer information,true CPs are obtained among all the CPs.The adaptive fuzzy clustering（AFC）technology is adopted to estimate the position of the MS with true CPs.Finally,simulations are conducted to evaluate the performance of the algorithm.The results demonstrate that the proposed location algorithm can significantly mitigate the NLOS effect and efficiently estimate the MS position.展开更多
为解决变电站非视距(non line of sight,NLOS)严重条件下超宽带定位精度低的问题,基于现有到达时间(Time of Arrival,TOA)测距方法,提出了一种融合Taylor级数及改进容积Kalman滤波的定位算法以提高定位估计精度。所提算法首先对泰勒算...为解决变电站非视距(non line of sight,NLOS)严重条件下超宽带定位精度低的问题,基于现有到达时间(Time of Arrival,TOA)测距方法,提出了一种融合Taylor级数及改进容积Kalman滤波的定位算法以提高定位估计精度。所提算法首先对泰勒算法初值进行优化,并通过对加权最小二乘法(Weighted Least Square,WLS)解算的位置估计值进行野值剔除及权重计算,在保证定位精度的同时降低算法复杂度;然后针对NLOS环境下标签坐标定位结果不稳定问题,运用改进容积卡尔曼滤波(CKF)算法进一步提升定位精度及稳定性。镇江银山11万伏变电站环境实验结果表明,所提方法在变电站环境中,NLOS严重条件下可实现定位精度10 cm以内,具备工程实用性及可行性。展开更多
文摘超宽带(Ultra-Wideband,UWB)技术能获得比现有无线定位技术更高的测距定位精度.本文主要讨论UWB定位技术的研究和应用,包括TOA/TDOA(Time/Time Difference of Arrival)等UWB定位方法、多径时延估计理论、非视距定位和协作式定位、多带OFDM(Orthogonal Frequency Division Multiplexing)定位和其他超宽带信号定位方式等方面,对其发展历程和现状进行了充分的叙述和分析,最后指出了仍存在的问题和值得进一步探讨的方向.
文摘在分布式多天线的基础上,提出一种新型非视距误差消除算法,并将其应用于传统的时间到达(time of ar-rival,TOA)定位。利用含多天线的天线组,测量出导致产生非视距传播的散射体的位置,将这些散射体看作虚拟基站,测量出移动台的坐标,完成无线定位。通过对算法的仿真结果分析表明,该算法能有效地消除非视距误差,比一些传统算法具有更高的定位精度。
基金The National High Technology Research and Development Program of China(863Program)(No.2008AA01Z227)the National Natural Science Foundation of China(No.60872075)
文摘In order to improve the performance of the traditional hybrid time-of-arrival（TOA）/angle-of-arrival（AOA）location algorithm in non-line-of-sight（NLOS）environments,a new hybrid TOA/AOA location estimation algorithm by utilizing scatterer information is proposed.The linearized region of the mobile station（MS）is obtained according to the base station（BS）coordinates and the TOA measurements.The candidate points（CPs）of the MS are generated from this region.Then,using the measured TOA and AOA measurements,the radius of each scatterer is computed.Compared with the prior scatterer information,true CPs are obtained among all the CPs.The adaptive fuzzy clustering（AFC）technology is adopted to estimate the position of the MS with true CPs.Finally,simulations are conducted to evaluate the performance of the algorithm.The results demonstrate that the proposed location algorithm can significantly mitigate the NLOS effect and efficiently estimate the MS position.
文摘为解决变电站非视距(non line of sight,NLOS)严重条件下超宽带定位精度低的问题,基于现有到达时间(Time of Arrival,TOA)测距方法,提出了一种融合Taylor级数及改进容积Kalman滤波的定位算法以提高定位估计精度。所提算法首先对泰勒算法初值进行优化,并通过对加权最小二乘法(Weighted Least Square,WLS)解算的位置估计值进行野值剔除及权重计算,在保证定位精度的同时降低算法复杂度;然后针对NLOS环境下标签坐标定位结果不稳定问题,运用改进容积卡尔曼滤波(CKF)算法进一步提升定位精度及稳定性。镇江银山11万伏变电站环境实验结果表明,所提方法在变电站环境中,NLOS严重条件下可实现定位精度10 cm以内,具备工程实用性及可行性。
