Expediting back-projection algorithm for circular SAR imaging

被引：4
|
作者：
Li, Haolin [1 ]
Zhang, Lei [1 ]
Xing, Mengdao [1 ]
Bao, Zheng [1 ]
机构：
[1] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Peoples R China
来源：
ELECTRONICS LETTERS | 2015年 / 51卷 / 10期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1049/el.2015.0348
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The availability of an expediting back-projection (EBP) algorithm for circular synthetic aperture radar (CSAR) imaging is investigated. EBP works by dividing the full aperture into sub-apertures, and using a unified polar grid to generate sub-images. On the basis of the correspondence between the wavenumber domain and the phase history domain, EBP combines all sub-aperture spectrums into a full-aperture one and reconstructs the CSAR image followed by a two-dimensional (2D) fast Fourier transform. Without time-consuming 2D interpolation, EBP is capable of decreasing the loss of spectrum, while improving significantly the computational efficiency compared with direct BP.
引用
收藏
页码：785 / 786
页数：2
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