子带子孔径ATI地面运动目标检测及参数估计方法

该文提出了一种新的基于子带子孔径图像序列的顺轨干涉(ATI)地面运动目标检测方法。该方法利用超宽带合成孔径雷达(UWB SAR)的大带宽大波束角和低频特性，生成了对应不同中心频率和视角的多幅子带子孔径顺轨干涉图，并联合运动目标的多频多子孔径干涉相位进行地面运动目标检测和参数估计。该方法相比传统的ATI方法的优点在于:在检测方面，消除了盲速，既能检测具有距离向速度的目标，又能检测具有方位向速度的目标；在速度估计方面，能无模糊地同时估计出目标的距离向速度和方位向速度。基于UWB SAR半实测回波的实验验证了该方法的有效性。

A Ground Moving Target Detection and Parameter Estimation Method Using Subband and Subaperture Along Track Interferometry

A method of ground moving target detection based on subband and subaperture ATI image series is proposed. It exploits the wideband, large beamwidth and low frequency characteristics of UWB SAR to generate a series of subband and subaperture ATI images. These images corresponding to different centre frequencies and angle-views are combinded to detect a moving target and estimate its parameters. The proposed method in the paper has improvements over traditional ATI method. For detection, it removes blind velocity and can detect the moving target not only with range velocity, but also with azimuth velocity. Besides, it can estimate the unwrapped range velocity and azimuth velocity as well. The experiment based on UWB SAR half-real echo validates the method.