SAR图像生成的N2logN反投影算法

Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154) Pub Date : 2000-12-01 DOI:10.1109/ACSSC.2000.910908

Shu Xiao, D. Munson, S. Basu, Y. Bresler

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引用次数: 49

摘要

本文提出了一种基于层析成像的快速反投影算法的远场SAR成像快速算法。我们还针对近场场景修改了算法。SAR快速反投影算法的计算复杂度为0 (N/sup 2/logN)。与传统的基于fft的方法相比，我们的新算法具有潜在的优势:新算法不需要在广角情况下进行复杂的频域插值;新方法适用于考虑波前曲率的近场场景;该算法可以很容易地适应于并行计算体系结构。对于一些感兴趣的场景，新的反向投影方法的计算成本与基于FFT的算法相似或更少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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An N2logN back-projection algorithm for SAR image formation

We propose a fast algorithm for far-field SAR imaging based on a new fast back-projection algorithm developed for tomography. We also modify the algorithm for the near-field scenario. The fast back-projection algorithm for SAR has a computational complexity O(N/sup 2/logN). Compared to traditional FFT-based methods, our new algorithm has potential advantages: the new algorithm does not need frequency-domain interpolation, which becomes complex for the wide-angle case; the new approach is applicable to the near-field scenario, taking into account wavefront curvature; and the back-projection algorithm can be easily adapted to parallel computing architectures. For some scenarios of interest, the computational cost of the new back-projection approach is similar to or less than that for FFT based algorithms.

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Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)

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