摘要
在深入分析STAP技术和FrFT的基础上,提出了一种对SAR动目标检测的新方法。新算法将STAP技术、FrFT和DPCA技术有机地结合起来,在三通道的工作情况下,能够实现对运动目标的定位和两个方向(方位向和地面距离向)上速度的估计。由于STAP技术良好的杂波对消功能和FrFT对chirp信号的良好检测效果,因此在不同信噪比情况下,本算法都能有效地抑制静止背景、获得良好的测速和定位效果。仿真结果证明了该算法的正确性和有效性。
An approach for SAR moving target dectetion was proposed in this paper, on the basis of the detailed analysis of STAP technique and fractional Fourier transform （FrFT）. The new algorithm which combines STAP technique, DPCA technique with FrFT, can realize the localization and velocity estimations in both ground range direction and azimuth direction, when it comes to a three-channel radar system. Because of the good capability of STAP technique for clutter cancellation and the nice effect of FrFT for chirp signal detection, the new algorithm can suppress the clutter and realize the localization and velocity estimations well in different signal-to-noise ratio conditions. The simulation results validated the effectiveness of this algorithm.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2008年第4期1358-1363,共6页
Journal of Astronautics
基金
国家"863"计划(2006AA701413-3)
武器装备预研一般基金(9140A21040206HT01)
