UWBSAR叶簇隐蔽目标差值变化检测中杂波分布建模分析与应用  

Analysis and application of clutter distribution modeling in UWB SAR difference change detection of target in foliage

作　　者：王广学[1,2] 黄晓涛[2] 周智敏[2] 

机构地区：[1]空军预警学院,湖北武汉430019 [2]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《通信学报》2012年第2期76-81,共6页Journal on Communications

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0223);国家自然科学基金资助项目(60972121)~~

摘　　要：由于树林观测区域后向散射强度具有快变特性,现有方法无法对UWB SAR叶簇隐蔽目标差值变化检测的杂波分布进行准确建模分析。为此,首先推导分析了均匀观测场景差值变化检测的杂波分布模型,而后假设观测场景后向散射强度服从伽马分布,在此基础上进一步推导了一种快起伏场景差值变化检测杂波分布模型。实验应用结果表明,该分布模型可对树林区域差值变化检测的杂波分布进行准确建模分析,从而提高变化检测性能。In forest area, the intensity backscatter varies quickly. In UWB SAR foliage-concealed target difference change detection, this characteristic had made existing clutter models couldn＇t fit the clutter distribution accurately. To address the problem, the clutter model suitable for uniform scene was derived. After that, by assuming the intensity of forest area backscatter follows Gamma distribution, the clutter model suitable for serious non-stationary scene was estab- lished. And the experimental results showed that, in foliage-concealed target difference change detection, the proposed model could fit the clutter distribution more accurately, and an improved detection performance could be achieved.

关 键 词：变化检测 叶簇隐蔽目标检测 超宽带合成孔径雷达 杂波建模 

分 类 号：TN957.51[电子电信—信号与信息处理]