三星时差无源跟踪算法研究

基于卫星平台的无源定位系统可以通过卫星的绕地运动和轨道覆盖，实现对全球地面辐射源的被动侦察，具有侦察隐蔽性强、侦测范嗣广和不受地理位置限制的优点。把一种新的修正协方差扩展卡尔曼滤波（MVEKF）方法引入三星对运动目标的时差无源定位跟踪中，克服了EKF受初始状态和测量误差影响大的缺点，也不用像MGEKF一样需要观测方程的修正函数，仿真表明该滤波方法相对来说收敛速度更快，跟踪性能更好。

Research on TDOA Passive Tracking Algorithm Using Three Satellites

The passive location system based on satellites can realize passive scout for global radiation source on earth ,and it has advantages of secret scout, large range and can not be limited by geographic position A new method of the modified covariance extended Kalman filtering （MVEKF） was applied to passive location and tracking using three satellites for moving target in this paper. It can get over the defect that the EKF method can be affected by initial condition and measurement error, and it does not need the corrected function of observation equation. The emulation indicated that this method had faster speed and better tracking performance.