布局方式对TDOA室内定位精度影响分析

Analysis of influence of layout mode on TDOA indoor positioning precision

针对到达时间差(TDOA)室内定位方法存在多基站布局方式对定位精度的影响问题,基于TDOA的几何精度因子(GDOP)方法仿真分析不同布局方式、主基线长度及基站高度对室内定位精度的影响。在三维多基站条件下,对正方形、圆形、蜂窝形布局方式进行仿真。得出不同的布局方式下的GDOP的分布图,仿真分析得出正方形布局方式室内定位精度最高,并以正方形布局为例,仿真分析不同主基线和高度下的GDOP分布图,得出最合理的布局方式,为实际室内定位应用中多基站布局提供了理论参考。

Aiming at the problem that the layout of multiple base stations affects the positioning precision,in indoor positioning method based on time difference of arrival(TDOA),geometric dilution of precision(GDOP)method based on TDOA is used to simulate and analyze the effects of different layout methods,main baseline length and base station height on the indoor positioning precision.Square,round and honeycomb layout modes are simulated under the condition of three-dimensional multi-basestation.It is concluded that the distribution diagram of different layout mode of GDOP,a square layout simulation analysis indoor positioning precision is the highest,taking square layout as an example,the simulation analysis under different main baseline and height of GDOP distribution diagram,the most reasonable layout mode is concluded,a theoretical reference is provided for multiple base station layout in practical indoor positioning application.