作者
Qi Dong, Meng-Dao Xing, Xiang-Gen Xia, Sheng Zhang, Guang-Cai Sun
发表日期
2017/12/12
期刊
IEEE Geoscience and Remote Sensing Letters
卷号
15
期号
1
页码范围
127-131
出版商
IEEE
简介
Focusing moving targets with frequency-domain algorithms may suffer from azimuth spectrum not entirely contained within a pulse-repetition frequency band, which may lead to degraded detection performance due to distributing the energy to the artifacts. In order to avoid this problem, a refocusing algorithm after back-projection integral is proposed. The main idea is first to uniformly and coarsely focus moving targets for detection, and then extract the detected targets for refocusing. By deriving the exact analytic expression of the wavenumber spectrum, motion parameter estimation and motion compensation are directly carried out on the 2-D wavenumber domain of the small-sized extracted data, which involves fast Fourier transform and Inverse Fast Fourier Transform operations only with no interpolation, thus reduces the computational complexity. Then, the final refocused image of the moving target is achieved …
引用总数
2018201920202021202214422
学术搜索中的文章
Q Dong, MD Xing, XG Xia, S Zhang, GC Sun - IEEE Geoscience and Remote Sensing Letters, 2017