非对称构型多站时差定位系统定位精度分析

Location precision analysis of multi-station TDOA location system with non-symmetric configuration

以空间四站时差定位系统为例对多站时差定位系统原理进行阐述,推导定位系统的定位精度并分析影响系统定位精度的因素。通过仿真分析多站时差定位系统在不同空间构型、站间距、时差测量误差、位置误差条件下对地面辐射源的定位精度得出:多站时差定位系统的空间构型直接影响定位精度,主辅站间距长度越长定位精度越好;各站位置误差比时差测量误差对定位精度的影响更大;对于多站定位系统出现的非对称空间构型,通过合理的布站优化可以提升对某一固定辐射源的定位精度。

This paper takes the space four-station time difference positioning system as an example to explain the principle of the multi-station time difference positioning system,derives the positioning accuracy of the positioning system and analyzes the factors that affect the system positioning accuracy.Through simulation multi-station location system different spatial configurations,station spacing,the time difference measurement error,the position error of the positioning accuracy in the condition of the ground radiation derived:multi-station spatial configuration location system directly affect the positioning accuracy,the longer the distance between the main and auxiliary stations,the better the positioning accuracy;the position error of each station has a greater influence on the positioning accuracy than the time difference measurement error;for an asymmetric spatial configuration of the multi-station positioning system,by rational station optimization can improve the positioning accuracy of a fixed radiation source.