径向运动测距单站定位的时差频差分析模型

TDOA/FDOA Analysis Model of Radial Moving Single Observer Location

基于径向运动测距的单站定位问题通常用匀速圆周运动学原理进行解释,但模型中的径向加速度参数是一个虚拟量,与定位站实际运动状态无直接联系。为此,提出了径向运动测距单站定位的时差频差(TDOA/FDOA)分析模型,该模型中的时差测量等效于测向,频差测量等效于径向测距,从而由时差频差曲线交点得到辐射源所在位置。仿真表明在站间距离为观测站与辐射源之间距离1/100量级时,该模型具有较好的精度。

The single observer location based on radial moving range is usually explained through the kinematics of uniform circular motion, but it is difficult to be understood because the radial acceleration is a virtual parame- ter without practical sense. In this paper, the TDOA/FDOA analysis model on single observer locaiton based on radial moving range was novelly put forward. In the new model, TDOA measure was equivalent to the direction finding and FDOA measure was equivalent to the radial range. The point of intersection for TDOA and FDOA curves was the object position. The good precision of this model was demonstrated throught the simulation, when the distance between two observers was approximately the 1/100 of the object range.