作者
Jianlai Chen, Buge Liang, De-Gui Yang, Dang-Jun Zhao, Mengdao Xing, Guang-Cai Sun
发表日期
2019/5/14
期刊
IEEE Transactions on Geoscience and Remote Sensing
卷号
57
期号
9
页码范围
7148-7160
出版商
IEEE
简介
The motion compensation (MOCO) for the airborne SAR with ultrahigh resolution and wide swath is required to consider the range-dependent (RD) phase error. The RD phase error may cause an RD residual-range cell migration (RCM) after the correction of RCM, which can degrade the performance of phase gradient autofocus (PGA) when estimating the phase error. In addition, because the PGA estimation is based on the strong scattering point, it may wrongly estimate the phase error for some observation scenes without strong scattering point. Alternatively, to take into account the above two problems, we study a MOCO algorithm based on two-step accuracy improvement. In the algorithm, the first step is to estimate and correct the RD residual-RCM and thus improves the accuracy of PGA. The second step is to develop a prior-information-based-weighted least square (PI-WLS) to further improve the accuracy of …
引用总数
20192020202120222023291374
学术搜索中的文章
J Chen, B Liang, DG Yang, DJ Zhao, M Xing, GC Sun - IEEE Transactions on Geoscience and Remote …, 2019