SAR分布目标多视图像分辨特性研究

发布时间：2018-04-18 03:15

本文选题：SAR + 分布目标　；参考：《电子与信息学报》2017年10期

【摘要】：该文提出了结合目标特性与图像多视数对SAR分辨特性进行分析和评定的方法。基于对SAR目标可分辨概率的研究,以及对SAR复散射回波信号特性的分析,得到了目标之间关于信号幅度比、相位差和多视数的联合概率密度函数,建立了SAR分布目标可分辨特性与目标统计特性以及图像多视数之间的数学关系模型。结合目标可区分条件,探讨分析了目标统计特性和多视处理对SAR系统分辨特性的影响。从该文的研究分析可以看出,由于分布目标信号具有的随机特性,在目标间距离小于传统的分辨率时也存在可分辨性,目标间距离大于系统分辨率时也存在不可分辨性。多视处理相当于增加了目标间的相关性,同样对SAR的分辨特性有较大的影响。该文提出的分辨特性评价指标将SAR系统特性与目标特性相结合,更能真实反映SAR的分辨性能,对SAR系统参数设计和评定有重要意义。
[Abstract]:In this paper, a method for analyzing and evaluating the resolution of SAR is proposed, which combines the target characteristics with the multi-view number of the image.Based on the study of discernible probability of SAR target and the analysis of the characteristics of SAR complex scattering echo signal, the joint probability density function of signal amplitude ratio, phase difference and multi-view number between targets is obtained.A mathematical model of the relationship between the discernibility of SAR distributed targets, the statistical characteristics of the targets and the multi-view number of images is established.The effects of target statistical characteristics and multi-view processing on the resolution characteristics of SAR system are discussed.From the analysis of this paper, it can be seen that because of the random characteristic of distributed target signal, there is also resolution when the distance between targets is smaller than the traditional resolution, and there is indiscernibility when the distance between targets is larger than the system resolution.Multi-view processing is equivalent to increasing the correlation between the targets, and also has a great influence on the resolution characteristics of SAR.The proposed evaluation index combines the characteristics of the SAR system with the target characteristics, which can reflect the resolution performance of the SAR. It is of great significance to the design and evaluation of the parameters of the SAR system.
【作者单位】：中国科学院电子学研究所;中国科学院大学;
【基金】：国家自然科学基金(61471340)~~
【分类号】：TN957.52

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