利用三星时频差的运动辐射源定位与测速方法

针对高轨三星无源定位系统对空中恒定高度运动目标探测的应用场景，提出了一种利用信号到达时差( TDOA)、到达频率差( FDOA)的无源定位与测速方法。详细描述了算法原理、算法处理步骤，利用STK( Satellite Tool Kit)软件结合计算机仿真，分析了时差测量误差、频差测量误差、高程估计误差对定位精度与测速精度的影响。该方法定位精度与测速精度较高，具有一定的工程应用价值。

A mobile emitter localization and velocity estimation method using TDOA and FDOA measurements from three satellites

For the purpose of estimating location and velocity of moving target in three satellites system,a solution is presented for emitter passive location and velocity estimation using time-difference-of-arrival(TDOA) and frequency-difference-of-arrival(FDOA).Principles and process steps of the solution are described.The influence of TDOA measurement error,FDOA measurement error and altitude estimate error on location accuracy and velocity estimation accuracy is analyzed by Satellite Tool Kit(STK) and computer simulation.The proposed solution is accurate and efficient in locating and velocity estimating,which can be easily applied in engineering.