Polar Format imaging algorithm based on range scaling for spotlight SAR

被引：0
|
作者：
Li C. [1 ,2 ]
Liu C. [1 ]
Gao X. [1 ]
机构：
[1] Institute of Electronics, Chinese Academy of Sciences
[2] Graduate University of Chinese Academy of Sciences
来源：
Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2011年 / 33卷 / 06期
关键词：
Chirp-Z transform; Polar Format Algorithm (PFA); Residual Video Phase (RVP); SAR; Scaling;
D O I：
10.3724/SP.J.1146.2010.01068
中图分类号：
学科分类号：
摘要：
There are two main problems through the implementation of Polar Format Algorithm (PFA). First, the error of Residual Video Phase (RVP) arises after the dechirp operation. Second, the interpolation has influence on the computation efficiency and imaging precision. This paper proposes a novel algorithm where range resampling is based on the principle of Scaling and Chirp-Z transform is adopted on azimuth dimension. The presented approach only consists in FFTs and multiplications, which effectively helps to decrease the computational burden and improve the imaging quality. Besides, the presented algorithm is much simpler than the existing range CZT approach. Point target simulation validates effectiveness of the presented algorithm.
引用
收藏
页码：1434 / 1439
页数：5
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