Ultrahigh Range Resolution ISAR Processing by Using KT-TCS Algorithm

被引：14
作者：
Gao, Yuexin [1 ,2 ]
Xing, Mengdao [1 ,2 ]
Zhang, Zijing [1 ,2 ]
Guo, Liang [1 ,2 ]
机构：
[1] Xidian Univ, Natl Lab Radar Signal Proc, Xian 710071, Shaanxi, Peoples R China
[2] Xidian Univ, Collaborat Innovat Ctr Informat Sensing & Underst, Xian 710071, Shaanxi, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2018年 / 18卷 / 20期
基金：
中国国家自然科学基金;
关键词：
Keystone transform (KT); time-domain chirp scaling (TCS); inverse synthetic aperture radar (ISAR) imaging; ultrahigh range resolution (UHRR); COMPENSATION;
D O I：
10.1109/JSEN.2018.2867071
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Nowadays, the slant-range resolution of inverse synthetic aperture radar (ISAR) can be improved to 1.5 cm by the application of microwave photonics technology. With the great improvement in range resolution, the ISAR images may contain more information on targets. However, ultrahigh resolution also induces severer space-variant range cell migration (RCM). In this paper, we propose an algorithm based on Keystone transform (KT) and time-domain chirp scaling (TCS) to deal with the space-variant RCM in ISAR imaging with ultrahigh range resolution. The algorithm consists of two steps. In the first step, the azimuth-variant linear components in the space-variant RCM are compensated for by KT. In the second step, the TCS is performed to remove the range-variant quadratic RCM. The results acquired from the processing of both the simulation and the real data validate the effectiveness of the proposed algorithm.
引用
收藏
页码：8311 / 8317
页数：7
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