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舰船目标一维距离像水声测量的互信息度量方法
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摘要
针对舰船目标一维距离像数据库的构建,分析研究了水声测量获取距离像与雷达一维距离像的相似性度量问题,提出了基于互信息的相似性度量方法。首先,分析了舰船目标一维距离像数据的统计特性,在小角度范围内根据中心极限定理得出距离像的高斯统计特性;进一步,利用互信息对两类距离像数据进行相似性度量,给出了互信息度量的理论表达式;最后,根据水声测量实验数据和电磁仿真数据的对比分析,验证了互信息度量方法的有效性以及水声测量实验所得数据与电磁仿真数据的一致性。
For the database construction of ship's high range resolution profile(HRRP), the similarity measure of ship's HRRP between underwater acoustic measurement and radar measurement is researched, and the method based on mutual information is proposed for the similarity measure. First, the statistical characterization of ship's HRRP is analyzed based on the radar target scattering principles. The gauss distribution of ship's HRRP in the small aspect angle is satisfied with the central limit theorem. Second, the mutual information is analyzed which is used to validate the similarity of two group of HRRP data. Finally, the mutual information of underwater acoustic measurement and electromagnetic simulation is analyzed, which can validate the effectivity of the proposed method.
引文
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