基于不敏变换的GDOP计算

Calculation of GDOP Based on Unscented Transformation

摘要:

现有文献一般采用线性化的方法得到非线性系统的定位精度几何稀释(Geometrical Dilution of Precision,GDOP)。然而,当定位系统的非线性较强时,线性化方法得到的GDOP同系统实际定位误差存在较大的偏差。针对这种情况,提出采用不敏变换(Unscented Transformation,UT)计算GDOP的方法,并通过一个数值例子进行了验证。

Abstract:

The existing literatures usually adopt the linearization method to obtain the geometrical dilution of precision (GDOP) for nonlinear systems. However, the obtained GDOP may deviate the true values of location errors severely when the location system is of severe nonlinearity. Thus the calculation of GDOP based on unscented transformation (UT) was proposed and verified by a numerical example in this paper.