基于无线通信基站的室内三维定位问题

Indoor three-dimensional positioning problem based on wireless communication base station

主要研究基于无线通信基站的室内三维定位问题。基于无线通信基站的定位系统在室内定位方面相较于传统GPS定位优势明显。考虑到无线电传播的环境（LOS和NLOS）,运用无线电到达时间差（TDOA）建立基于误差分析的终端三维定位数学模型,提出基于空间几何约束和误差分析的定位算法;并利用几何精度因子（GDOP）、连接度数指标分析不同基站数目、不同基站排列位置对定位精度的影响;模型可以最少利用5个基站就能完成终端的精确定位,并且算法复杂度低、收敛速度快。

This paper mainly studies the indoor three-dimensional positioning problem based on wireless communication base station.The positioning system based on wireless communication base station has obvious advantages over the traditional GPS positioning in the interior positioning.Given the radio-transmitting environment（LOS and NLOS）,by using the radio arrival time difference（TDOA）,a three-dimensional positioning mathematical model based on error analysis is established,and a locating algorithm based on spatial geometric constraints and error analysis is proposed,and the number of different base stations is analyzed by using GDOP precision factor and connection degree index.The influence of different base stations arrangement position on the positioning accuracy,the model can use 5 base stations to complete the precise positioning of the terminal,and the algorithm has low complexity and fast convergence speed.