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电子学报  2012 

基于干涉图幅度和相位联合的慢动目标CFAR检测方法

DOI: 10.3969/j.issn.0372-2112.2012.11.012, PP. 2211-2220

Keywords: 干涉图,IMP检测量,统计分布,CFAR检测

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Abstract:

提出了一种新的基于干涉图幅度和相位联合的慢动目标CFAR检测方法.在理论层面上,基于复Wishart分布,推导出了均匀区域、不均匀区域和极度不均匀区域等不同环境下IMP检测量的统计分布族,并根据Mellin变换导出了各分布模型的参数估计器.在算法层面上,通过结合邻域平均这种等效的多视处理方式获得IMP检测量图像后,根据推导出的IMP检测量各分布模型对应的CFAR阈值求解方式,利用滑动窗口的形式实现慢动目标的自动检测.对双通道SAR实测数据进行实验,采用KL度量、MSE度量和K-S检验作为定量评估准则,结果证明了IMP检测量分布模型族及对应参数估计器的有效性以及基于IMP检测量实现慢动目标CFAR检测的更优性能.

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