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一种基于空间-波数分布的超宽带SAR地雷目标特征提取新方法 被引量:2

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摘要 利用车载或机载的超宽带SAR进行快速大区域地雷或雷场探测是探雷的发展方向.目前制约超宽带SAR探雷实用化的主要问题是虚警太高.文中从超宽带SAR回波和成像模型出发,提出了基于空间-波数分布的超宽带SAR目标特性斜距-方位-频率-角度四维空间表示方法,能够提取地雷目标不同频率和不同方位角的电磁特征.为了降低特征维数,利用分支定界方法进行特征选择,最后确定频率为1.1 GHz,方位角分别为-14°,-7°,0°,7°和14°时的目标一维斜距像作为特征向量.基于提取的特征,利用支持向量机(SVM)对Rail-GPSAR系统实测数据进行处理.处理结果表明,文中提取的特征及其SVM检测器能实现检测概率0.9时,虚警小于0.01 m2,达到实用要求.
出处 《自然科学进展》 北大核心 2007年第1期114-121,共8页
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参考文献19

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同被引文献31

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