多径环境下平面时差定位精度分析

Precision analysis of 2D TDOA location in multi-path environment

从多径环境下时差测量误差的概率分布模型入手,研究了该环境下基于测量误差概率分布的时差定位精度模型,给出了时差定位误差椭圆的位置与大小的计算方法。通过计算机仿真,分别得出了等腰三角形布站和直角三角形布站情况下的定位误差椭圆分布,结果表明:该模型能较为直观准确地反映出多径效应对时差定位精度的影响。

Based on the probability distribution model of the TDOA location error, this paper dealt with the precision model of TDOA location in multi-path environment, proposed the calculation method of the error ellipses, and obtained the distribution of the error ellipses under isosceles triangle and rightangled triangle station deployment through computer simulation. It shows that this model can describe how the multi-path effect influences the TDOA location precision intuitively and exactly, and this will be helpful for us to carry out further studies on problems such as TDOA location and station deploy- ment in multi-path environment.