摘要
动态环境下的定位是最基本的应用支持技术之一。仅靠电磁信号的高精度测距定位对普通移动电子设备及其时钟同步的要求很高,而且对电磁干扰、多径效应和非视距等因素的影响较为敏感。为适应移动节点所处的邻居信标节点数量的不断变化和复杂电磁环境下对高精度定位的特殊要求,解决在信标节点稀疏分布情形下的高精度定位问题,提出基于次声波和电磁波的非同步TDOA三维测距解析定位及加权辅助定位算法,其中包括三维解析定位算法、动态质心定位算法和轻量级的新抗差加权最小二乘算法,并研究了内插法下的运动轨迹恢复。仿真表明该算法具有很好的稳健性和很高的定位精度。
It is a basic application-supported technique to realize dynamic location.In order to make the precise locating method which is rather susceptible to the precise of the clock by the electromagnetic ranging ways fit the continuous changing of the neighbor anchor nodes especially in the anchor-node-deficiency situation in which all the nodes move randomly in the complex electromagnetic environment where the electromagnetic disturbance,multipath effect and the non line of sight（NLOS） etc are mixed together.The asynchrony TDOA（Time Difference Of Arrival） ranging and analytic localization based on the infrasound and the electromagnetic signals is proposed in this thesis,which contains three dimensional analytic localization algorithm,mobile centroid algorithm and new weighted robust least-square estimation with less amount of computation,and the tracks is plotted by interpolative resume as well.The simulation results show that the localization is robust and accurate.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第10期141-145,共5页
Journal of Wuhan University of Technology
关键词
复杂电磁环境
次声波
非同步TDOA测距
三维测距解析及加权辅助定位算法
内插恢复
complex electromagnetic environment
infrasound
asynchrony TDOA ranging
3D ranging＆analytic and weighted＆assisted localization
interpolative resume
