A New SAR-GMTI High-Accuracy Focusing and Relocation Method Using Instantaneous Interferometry

Sheng Zhang, Fang Zhou, Guang Cai Sun, Xiang Gen Xia, Meng Dao Xing, Zheng Bao

科研成果: 期刊稿件文章同行评审

12 引用 (Scopus)

摘要

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.

源语言英语
文章编号7484303
页(从-至)5564-5577
页数14
期刊IEEE Transactions on Geoscience and Remote Sensing
54
9
DOI
出版状态已出版 - 9月 2016
已对外发布

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