一种度量目标散射随机性的新参数  

A novel parameter to measure target scattering randomness

作　　者：陈强[1] 蒋咏梅[1] 匡纲要[1] 

机构地区：[1]国防科技大学电子科学与工程学院三系,湖南长沙410073

出　　处：《信号处理》2010年第9期1300-1305,共6页Journal of Signal Processing

摘　　要：针对现有目标散射随机性度量参数运算量偏大、度量不合理等问题,本文提出了一种基于目标散射回波极化度的度量目标散射随机性的新参数——散射随机系数。在分析散射回波极化度与散射随机性之间的相互关系的基础上,首先给出了基于散射回波极化度的散射随机系数定义。然后通过分析新参数随着目标各向异性和散射阶次的变化情况,阐明新参数在度量目标散射随机性方面是合理的。最后结合San Francisco和Flevoland两地区的实测极化数据验证了新参数在度量目标散射随机性方面的有效性,与极化散射熵的对比实验结果表明了在大数据量的POLSAR图像散射分类应用中新参数运算效率更高。Aiming at the deficiency of the present parameters to measure target scattering randomness, a novel parameter is defined based on the degree of polarization of target scattering wave. Firstly, after the analysis of the relationship between the degree of polarization of target scattering wave and target scattering randomness, the novel parameter is constructed with the degree of polarization of target scattering wave. And then the feasibility of the novel parameter to measure target scattering randomness is clarified by the analysis of the behavior of the novel parameter as a function of the scattering order in volume backscatter or target anisotropy. As the new parameter involves simple operation, it overcomes the time-consuming operation of the present parameters. With the experiment results of the real polarimetric SAR data of the typical areas of San Francisco and Flevoland, the rationality and practicability of this novel parameter are validated.

关 键 词：目标随机性 极化度 极化SAR图像分类 雷达极化 

分 类 号：TN957[电子电信—信号与信息处理]