TY - JOUR
T1 - A New SAR-GMTI High-Accuracy Focusing and Relocation Method Using Instantaneous Interferometry
AU - Zhang, Sheng
AU - Zhou, Fang
AU - Sun, Guang Cai
AU - Xia, Xiang Gen
AU - Xing, Meng Dao
AU - Bao, Zheng
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/9
Y1 - 2016/9
N2 - In this paper, for a multichannel synthetic aperture radar-ground moving target indication (SAR-GMTI) system, a new high-accuracy focusing and relocating method using instantaneous interferometry, i.e., carrying out interferometry operation in the azimuth time domain before focusing, is proposed. One of the key steps of this method is to perform instantaneous interferometry to get accurate equivalent cross-track velocity (ECV) estimation for cross-track motion compensation. After that, the signal from a moving target is concentrated in range, and along-track motion compensation becomes convenient. Motion compensation transforms a moving target into a stationary one; thus, the conventional SAR imaging algorithm can be applied to focus the moving target. Finally, a strategy for accurately relocating a moving target is presented. The processing results of simulated and measured data illustrate the effectiveness of the proposed method.
AB - In this paper, for a multichannel synthetic aperture radar-ground moving target indication (SAR-GMTI) system, a new high-accuracy focusing and relocating method using instantaneous interferometry, i.e., carrying out interferometry operation in the azimuth time domain before focusing, is proposed. One of the key steps of this method is to perform instantaneous interferometry to get accurate equivalent cross-track velocity (ECV) estimation for cross-track motion compensation. After that, the signal from a moving target is concentrated in range, and along-track motion compensation becomes convenient. Motion compensation transforms a moving target into a stationary one; thus, the conventional SAR imaging algorithm can be applied to focus the moving target. Finally, a strategy for accurately relocating a moving target is presented. The processing results of simulated and measured data illustrate the effectiveness of the proposed method.
KW - Cross-track velocity estimation
KW - Synthetic aperture radar (SAR)
KW - ground moving target indication (GMTI)
KW - instantaneous interferometry
UR - http://www.scopus.com/inward/record.url?scp=84973532104&partnerID=8YFLogxK
U2 - 10.1109/TGRS.2016.2569259
DO - 10.1109/TGRS.2016.2569259
M3 - Article
AN - SCOPUS:84973532104
SN - 0196-2892
VL - 54
SP - 5564
EP - 5577
JO - IEEE Transactions on Geoscience and Remote Sensing
JF - IEEE Transactions on Geoscience and Remote Sensing
IS - 9
M1 - 7484303
ER -