Polar format algorithm of synthetic aperture radar imaging on spiral trajectory

被引：0
|
作者：
Li, Feng [1 ,2 ]
Yang, Wengu [1 ,2 ]
Wang, Zhou [1 ,2 ]
Yao, Di [1 ,2 ]
机构：
[1] Beijing Inst Technol, Sch Informat & Elect, Beijing 100081, Peoples R China
[2] Beijing Key Lab Embedded Read Time Informat Proc, Beijing 100081, Peoples R China
来源：
JOURNAL OF ENGINEERING-JOE | 2019年 / 2019卷 / 19期
关键词：
interpolation; synthetic aperture radar; radar imaging; spiral trajectory SAR; flight platform; slant range; Range Cell Migration; effective imaging range; novel polar; synthetic aperture radar signal model; spiral trajectory platform; sector-by-sector phase compensation method;
D O I：
10.1049/joe.2019.0425
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel polar format algorithm is proposed for spiral trajectory. The synthetic aperture radar (SAR) signal model of spiral trajectory platform is firstly established, then the sector-by-sector phase compensation method of spiral trajectory SAR is proposed. With the descending of the flight platform, the slant range also decreases, thus the sector-by-sector phase compensation is required to correct the quadratic terms of the Range Cell Migration to expand the effective imaging range and eliminate the defocus of the target at the edge of the scene. The 2D-NUFFT is used to transform the 2D wavenumber domain instead of the traditional nearest interpolation method, which decreases the calculation. Finally, the algorithm is validated by simulation.
引用
收藏
页码：5580 / 5583
页数：4
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