Estimation of frequencies and damping factors by two-dimensional ESPRIT type methods
Estimation of frequencies and damping factors by two-dimensional ESPRIT type methods
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DOI：
10.1109/78.890367
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Rouquette-Léveil;M. Najim
中科院分区：
文献类型：
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作者：
S. Rouquette-Léveil;M. Najim
在本文中，我们考虑二维（2-D）信号由阻尼西线的总和建模。我们提出了两种高分辨率的方法来估计它们的频率和阻尼因子。两种高分辨率方法都是基于与每个维度相关的信号子空间的移位不变性结构。第一种方法是在矩阵增强和矩阵铅笔（MEMP）方法中估计两个维度的频率分量，然后将它们与新算法配对。第二种方法由信号频率对的直接估计组成，而不需要额外的步骤对与每个维度相关的频率进行配对。我们展示了这些方法如何估计雷达图像的散射点。
In this paper, we consider two-dimensional (2-D) signals modeled by the sum of damped cisoids. We propose two high-resolution approaches to estimate their frequencies and damping factors. Both high-resolution methods are based on the shift-invariance structure of the signal subspace related to each dimension. The first one estimates the frequency components in both dimensions as in the matrix enhancement and matrix pencil (MEMP) method before pairing them with a new algorithm. The second one consists of the direct estimation of the signal frequency pairs without an additional step to pair the frequencies related to each dimension. We show how these methods can estimate the scattering points of radar images.