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Analytic models and postprocessing techniques for UWB SAR

机译:UWB SAR的分析模型和后处理技术

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摘要

The latest generation of fully polarimetric, ultra wideband (UWB), wide angle, low frequency, foliage and ground-penetrating synthetic aperture radars (SARs) record huge amounts of data that must be processed to focus high quality images. At the same time only a few small subimages contain important information. We investigate the relationship between the focused image and the reflectivity profile and show that a linear shift-invariant model adequately represents the overall process when the focusing is done with a backprojection algorithm over a constant integration angle. The derived signal model can be used to replace many computationally expensive processing techniques, previously performed on the raw data, with equivalent postprocessing algorithms which can be applied selectively to subimages.
机译:最新一代的全极化,超宽带(UWB),广角,低频,枝叶和穿透地面的合成孔径雷达(SAR)记录了大量数据,必须处理这些数据才能聚焦高质量图像。同时,只有几个小的子图像包含重要信息。我们研究了聚焦图像和反射率轮廓之间的关系,并表明当使用反向投影算法在恒定积分角上进行聚焦时,线性位移不变模型可以充分代表整个过程。所导出的信号模型可用于以等效的后处理算法替换以前对原始数据执行的许多计算昂贵的处理技术,这些等效后处理算法可选择性地应用于子图像。

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