Doppler Centroid Estimation for Ground Moving Target in Multichannel HRWS SAR System

被引：15
|
作者：
Zhang, Zhenning [1 ,2 ]
Yu, Weidong [1 ,2 ]
Zheng, Mingjie [1 ]
Zhou, Zi-Xuan [1 ,2 ]
机构：
[1] Chinese Acad Sci, Dept Space Microwave Remote Sensing Syst, Aerosp Informat Res Inst, Beijing 100094, Peoples R China
[2] Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100049, Peoples R China
来源：
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2022年 / 19卷
关键词：
Synthetic aperture radar; Azimuth; Estimation; Doppler effect; Correlation; Receiving antennas; Microwave antennas; Azimuth undersampling; channel mismatch; Doppler centroid (DC) estimation; ground moving target; high-resolution and wide-swath (HRWS); multichannel synthetic aperture radar (SAR); subsignal usage;
D O I：
10.1109/LGRS.2021.3068403
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
In multichannel high-resolution and wide-swath (HRWS) synthetic aperture radar (SAR) ground moving target indication (GMTI) systems, Doppler centroid (DC) is an essential parameter for spectrum reconstruction and image focusing. However, the conventional DC estimator faces many problems in moving target with multichannel SAR system, such as nonuniform data in azimuth, subsignal usage, and channel mismatch. To estimate the DC of moving target, the modified cross-correlation coefficient (MCCC) method for multichannel SAR system is proposed in this letter, which is especially suitable for nonuniform and undersampled data. Simulations with real spaceborne data demonstrate the effectiveness of this method.
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页数：5
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