作者
Guangcai Sun, Mengdao Xing, Yan Liu, Lu Sun, Zheng Bao, Yirong Wu
发表日期
2010/11/11
期刊
IEEE Geoscience and Remote Sensing Letters
卷号
8
期号
3
页码范围
446-450
出版商
IEEE
简介
In the case of high range resolution and squint angle, current chirp scaling algorithm (CSA) and nonlinear CSA (NCSA) have a finite ability to achieve high-quality images. The problem stems from a range-dependent (i.e., space-variant) cubic- and higher order terms of range frequency, which require sufficient compensation or space-variant filtering, in the phase of the synthetic aperture radar transfer function, and this letter aims at dealing with this problem. First, an inequation is introduced to evaluate the highest order of range frequency terms whose space-variant coefficient has to be taken into account. Then, based on the method of series reversion, this letter proposes the extended NCS which can weaken the range dependence of the considered range frequency terms and achieve accurate range cell migration correction and range compression. Simulation results are presented to validate the proposed method.
引用总数
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学术搜索中的文章
G Sun, M Xing, Y Liu, L Sun, Z Bao, Y Wu - IEEE Geoscience and Remote Sensing Letters, 2010