Circular SAR processing using an improved omega-k type algorithm
Leilei Kou, Xiaoqing Wang, Jinsong Chong, Maosheng Xiang, and Minhui Zhu
Journal of Systems Engineering and Electronics . 2010, (4): 572 -579 .  DOI: 10.3969/j.issn.1004-4132.2010.04.008