无线电工程

时差定位根据目标到达多个站之间的时间差进行定位。三站对地面目标的定位属于三站定位问题。借助四站时差定位原理,提出先用四站时差Chan算法求解定位初值,然后用牛顿迭代法求解精确解的算法。时差定位方程加入地球方程才能构成完整的方程组,但非线性方程组的求解是一个复杂的过程。仿真试验发现,粗解精解联合求解算法以比较良好的效果解决了三站三维定位问题。

TDOA Location system finds the position of target by the time difference of target arrival to multiple stations.Tri-station ground object location is of a 3D location.This paper puts forward a new algorithm using coarse resolution by Chan algorithm of four-station TDOA equations and then exact resolution by Newton iteration.A complete set of equations consists of TDOA and earth equations.But the solving of nonlinear equations is a complex process.The method using coarse and accurate solution combination solved the issue of tri-station 3-D location according to the simulation experiment.