SAR成像中动目标的速度估算

Speed estimation of moving target in SAR imaging

提出了一种在SAR成像中估算动目标速度的方案。由于动目标的速度由距离向和方位向两个速度构成,因此它的估算也分为两个方面。首先是距离向速度的估算,由杂波锁定得到多普勒中心频率,再由多普勒中心频率估算出距离向速度。其次是方位向速度的估算,由自聚焦得到多普勒调频率,再由多普勒调频率得到方位向速度。最后将两个速度合成便能得到该动目标的速度。文中的仿真结果证明了这种方案的有效性。

This paper presented a scheme of estimating the speed of moving target in SAR imaging.The speed of moving target consists of two speeds in range and azimuth.Firstly,this paper used clutter lock to get Doppler centroid to estimate range speed.Then it used self-focusing to get Doppler frequency rate to estimate azimuth speed.At last,the two speeds are synthesized to obtain the speed of this moving target.The simulation results prove that this scheme is effective.