基于互Wigner-Ville分布的SAR运动目标检测

SAR Moving Targets Detection Based on Cross Wigner-Ville Distribution

本文针对机载合成孔径雷达 (SAR)运动目标回波信号的特点 ,提出了基于互Wigner Ville分布 (XWVD)的机载SAR运动目标检测方法 ,分析了它在单目标和多目标情况下的检测性能 .实验证明 ,该方法可以在较低的信噪比下实现目标的检测 ,其性能大大优于常用的Wigner Ville分布方法 .为了抑制多个目标之间交叉项的影响 ,本文还提出了一种基于逐次消去思想的互Wigner Ville分布检测方法 ,它可以解决强度相差较大的多目标检测问题 .

According to the features of airborne SAR moving target echoes,a new SAR moving target detection technique based on cross Wigner Ville distribution (XWVD) is proposed.Its detection performs on condition that single target and multiple targets exist respectively.The experiment validates that the performance of this new method can detect the signal with very low SNR.It is better than the common method based on Wigner Ville distribution.To eliminate the effects of cross terms,according to the idea of elimination one by one,a new detection scheme of XWVD is proposed,which can detect small target embedded in some large targets.The simulation results prove its effectivity.