An Improved Doppler Rate Estimation Approach for Sliding Spotlight SAR Data Based on the Transposition Domain
She Xiao-qiang①②③ Qiu Xiao-lan①② Han Bing①② Lei Bin①②
①(Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Institute of Electronics, Chinese Academy of Science, Beijing 100190, China) ②(Insititute of Electronics, Chinese Academy of Science, Beijing 100190, China) ③(University of Chinese Academy of Science, Beijing 100190, China)
In image processing of high-resolution sliding spotlight SAR, it is important to know the Doppler rate with accuracy; however, traditional Doppler rate estimation algorithms are not very helpful because of the azimuth spectrum folding phenomenon. In this study, an algorithm that works on the transposition domain is proposed to solve this problem. Furthermore, the algorithm is also helpful in obtaining excellent focused images by embedding it in the two-step technique. Finally, the proposed algorithm is verified using computer simulations.
折小强, 仇晓兰, 韩 冰, 雷 斌. 一种基于变换域的滑动聚束SAR 调频率估计方法[J]. 雷达学报, 2014, 3(4): 419-427.
Zhe Xiao-qiang, Chou Xiao-lan, Han Bing, Lei Bin. An Improved Doppler Rate Estimation Approach for Sliding Spotlight SAR Data Based on the Transposition Domain. JOURNAL OF RADARS, 2014, 3(4): 419-427.
