电磁散射特征稀疏展开中物理基函数的应用

J. Halman, A. N. O'Donnell, R. Burkholder
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引用次数: 0

摘要

本文探讨了利用物理基函数作为一种有效而深刻的稀疏展开来表示大型有限目标的电磁散射。这种扩展是应用压缩传感技术的核心。利用任意平板散射的闭式物理光学解,提取了与边角衍射和镜面反射散射机理相关的物理基函数。利用正交匹配追踪方法,从计算得到的散射场中求出稀疏展开系数随频率和角度的变化规律。收敛性是基函数和压缩感知样本数量的函数。
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On the use of physical basis functions in a sparse expansion for electromagnetic scattering signatures
This paper explores the use of physical basis functions as an efficient and insightful sparse expansion for representing the electromagnetic scattering from large finite targets. Such an expansion is central to applying compressed sensing techniques. The closed-form physical optics solution for scattering from an arbitrary flat plate is used to extract the physical basis functions related to scattering mechanisms of edge and corner diffraction, and specular reflection. Orthogonal matching pursuits is applied to find the coefficients of the sparse expansion from the calculated scattered fields of a plate as a function of frequency and angle. Convergence is demonstrated as a function of the number of basis functions and compressed sensing samples.
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