Imaging algorithm of high squint spotlight SAR based on azimuth deramp and nonlinear frequency scaling(NFS)

被引：0

作者：

Wu Y. ^{[1
,2
]}

Song H.-J. ^{[1
]}

Peng J. ^{[3
]}

Liu H.-Y. ^{[1
,2
]}

机构：

[1] Institute of Electronics, Chinese Academy of Sciences

[2] Graduate University of Chinese Academy of Sciences

[3] Department of Electronic and Information Engineering, Chuzhou University

来源：

Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2010年 / 32卷 / 09期

关键词：

Azimuth deramp; High squint; Nonlinear frequency scaling (NFS); Spotlight SAR;

D O I：

10.3724/SP.J.1146.2009.01274

中图分类号：

学科分类号：

摘要：

To eliminate the azimuthal spectral folding of spotlight Synthetic Aperture Radar (SAR) and the serious coupling between range and azimuth in high squint mode, an algorithm based on azimuth deramp and Nonlinear Frequency Scaling (NFS) is proposed. First, azimuth deramp operation eliminates the azimuthal spectral folding. Then nonlinear frequency scaling compensating the azimuth phase with the range scale variation is adopted to fulfill the focusing of the swath. Simulation results illustrate that it can eliminate azimuthal spectral folding, possess high precision and satisfy the imaging quality of high squint spotlight SAR and large scene swath.

引用

页码：2184 / 2190

页数：6

共 8 条

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