针对现有的室内三维定位技术定位精度较低的问题,提出了一种基于到达时间(TOA,time of arrival)测距的室内三维质心定位方法.在COMSOL软件中,建立真实的物理场仿真环境,将筛选出的4个基站坐标分别作为球心,基站与终端间的距离分别作为半径,构建出三维球体定位模型,对质心定位算法进行仿真.通过在相同实验条件下仿真实验表明,相比于传统质心定位的算法和基于RSSI的质心定位算法,改进的定位算法在精度上得到了提高,对环境也具有良好的适应性.%A three dimension centroid localization algorithm based TOA(time of arrival) is introduced to solve the problem of the poor localization accuracy of existing indoor three dimension location technology.The real physical simulation environment is established by COMSOL software,and the three dimensional sphere positioning model is constructed by taking four selected base station coordinates as sphere centers and the distance between the base stations and the terminal as the four radius separately.The centroid localization algorithm is simulated.The simulation experiments in the same experimental conditions show that the improved algorithm achieves better precision and good environmental adaptability than traditional weighted centroid algorithm and the weighted centroid algorithm based RSSI.
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