CAJ | 학술논문

提出了一种机载广域监视SAR地面运动目标检测和参数估计方法。首先，基于斜视SAR的空间几何模型推导了地面运动目标成像的特征，得出运动目标不仅在方位向发生偏移，而且在距离向也会产生位移；然后，利用子孔径方法实现杂波抑制和运动目标的检测；最后，提出了广域监视SAR模式下运动目标的参数估计方法，并得到了该模式下运动目标的成像轨迹。计算机仿真验证了本文提出的机载广域监视SAR系统可以实现运动目标的检测和目标运动轨迹的形成。
제출료일충궤재엄역감시SAR지면운동목표검측화삼수고계방법。수선，기우사시SAR적공간궤하모형추도료지면운동목표성상적특정，득출운동목표불부재방위향발생편이，이차재거리향야회산생위이；연후，이용자공경방법실현잡파억제화운동목표적검측；최후，제출료엄역감시SAR모식하운동목표적삼수고계방법，병득도료해모식하운동목표적성상궤적。계산궤방진험증료본문제출적궤재엄역감시SAR계통가이실현운동목표적검측화목표운동궤적적형성。
A method of moving target detection, localization and velocity estimation used for Wide Area Surveillance (WAS) radar system is proposed in this paper. Firstly, based on the geometry of wide area surveillance SAR, the image signatures of moving target is derived, which shows that it will shift not only in azimuth direction but in range direction. Then, it presents the ways of clutter suppression and moving target detection based on sub-aperture. Finally, an approach of parameter estimation is pro-posed for WAS SAR mode, and the trajectory of moving target is formed in this mode. Computer simulation results validate the effectiveness of the method proposed in this paper.