Real-Time Imaging Processing of Squint Spaceborne SAR with High-Resolution Based on Nonuniform PRI Design

被引:2
|
作者
Jin, Yanghao [1 ]
Liang, Buge [1 ]
Chen, Jianlai [1 ]
Xiong, Yi [1 ]
Xiong, Mingyao [1 ]
机构
[1] Cent South Univ, Sch Automat, Changsha 410083, Peoples R China
基金
中国国家自然科学基金;
关键词
synthetic aperture radar (SAR); nonlinear trajectory; velocity-azimuth variation; uniform PRI; real-time imaging; SYNTHETIC-APERTURE RADAR; CHIRP-SCALING ALGORITHM;
D O I
10.3390/rs14153725
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The real-time imaging research of squint spaceborne synthetic aperture radar (SAR) with high resolution has significant value in both military and civil fields, which makes it a hot issue in SAR research. It is necessary to solve the contradictory problems of nonlinear trajectory and efficient imaging at the same time in order to achieve the two goals, high-resolution and real-time imaging. A large number of complex operations are required in the accurate correction algorithms for nonlinear trajectory, which will reduce the imaging efficiency, and this problem becomes more prominent with the improvement of resolution. To solve the above problems, this paper proposes a new real-time imaging processing of squint high-resolution SAR, which eliminates the velocity-azimuth variation caused by nonlinear trajectory in the data acquisition stage through nonuniform pulse repetition interval (PRI) design. The imaging efficiency has been greatly improved because the new method avoids the complex azimuth resampling operation. Simulation experiments verify the effectiveness of the method.
引用
收藏
页数:15
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