分析了卡尔曼滤波原理及其在非线性方程中的应用,同时提出了一种测量目标辐射源脉冲到达时间差和到达方向,实现固定单站对运动辐射源进行无源定位的算法.通过计算机仿真,验证了该方法的正确性与有效性.运用卡尔曼滤波器,该算法获得很好的定位效果. The principle of Kalman filter and its application to nonlinear equations are analyzed, and an algorithm to measure the arrival time and the arrival direction of the pulse of the target emitter is proposed to realize the passive positioning of the moving radiation source by a fixed single station. Through computer simulation , Verify the correctness and effectiveness of the method.Using Kalman filter, the algorithm obtains a good positioning effect.