Improved nonlinear chirp scaling algorithm for dechirped missile-borne synthetic aperture radar

被引：3
|
作者：
Chen, Si [1 ]
Zhang, Shuning [1 ]
Zhao, Huichang [1 ]
Zhou, Xingang [1 ,2 ]
Chen, Yong
机构：
[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Fac Detect & Control, Nanjing 210094, Jiangsu, Peoples R China
[2] Commun Network Technol Management Ctr Nanjing Int, Nanjing 210016, Jiangsu, Peoples R China
来源：
JOURNAL OF APPLIED REMOTE SENSING | 2014年 / 8卷
基金：
中国国家自然科学基金;
关键词：
missile-borne synthetic aperture radar; dechirp; range cell migration correction; azimuth nonlinear chirp scaling; SPOTLIGHT SAR; RANGE; EFFICIENT;
D O I：
10.1117/1.JRS.8.083505
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
An improved nonlinear chirp scaling (NLCS) algorithm for dechirped missile-borne synthetic aperture radar was proposed. The key step is to use an improved NLCS operation to equalize azimuth frequency modulation rate after linear range walk correction, secondary range compression, and range compression. By adopting a higher-order approximation, the image has better accuracy and less distortion. Validity of the algorithm is demonstrated using simulated and real datasets. Moreover, the whole procedure only consists of fast Fourier transform and complex multiplication, which means easier implementation and higher efficiency. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
引用
收藏
页数：17
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