适用于W波段ISAR成像的二维补偿方法

doi:10.3969/j.issn.1001-2400.2016.03.027

西安电子科技大学学报 ›› 2016, Vol. 43 ›› Issue (3): 155-160.doi: 10.3969/j.issn.1001-2400.2016.03.027

适用于W波段ISAR成像的二维补偿方法

魏一搏1,2;王辉1;李宁1,2;禹卫东1

(1. 中国科学院电子学研究所，北京 100190;
2. 中国科学院大学，北京 100039)

收稿日期:2015-01-19 出版日期:2016-06-20 发布日期:2016-07-16
通讯作者: 王辉
作者简介:魏一搏(1990-)，男，中国科学院电子学研究所硕士研究生，E-mail: ghost200802@163.com．

Two dimension migration compensation method for W-band ISAR imaging

WEI Yibo1,2;WANG Hui1;LI Ning1,2;YU Weidong1

(1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100039, China)

Received:2015-01-19 Online:2016-06-20 Published:2016-07-16
Contact: WANG Hui

摘要/Abstract

摘要：

针对W波段逆合成孔径雷达成像过程中越分辨单元徙动严重的问题，提出了一种二维补偿成像方法．该方法首先分析了逆合成孔径雷达成像中目标徙动产生的原因，然后使用Keystone变换对距离向徙动进行补偿；对于均匀转速目标，使用最小熵法从方位向徙动中估计目标的平均转动角速度，用相位补偿的方法对均匀角速度目标的方位向徙动进行补偿；最后，对于变化角速度目标，利用子孔径的方法降低目标成像中的由角速度变化带来的方位向徙动．该方法在仿真中获得了高分辨率的成像结果，证明了该算法的有效性．

关键词: W波段, 逆合成孔径雷达, Keystone变换, 相位补偿, 子孔径成像

Abstract:

The problem of migration through the resolution cell (MTRC) in the W-band Inverse Synthetic Aperture radar (ISAR) imaging system is serious. Therefore, a novel two dimensional compensation method is proposed in this paper. Firstly, the cause of migration in ISAR imaging is analyzed. Then, the Keystone transform is used to compensate the MTRC in the range direction. After that, the minimum entropy algorithm is used to estimate the average rotate speed of the target and the rotate speed is used to compensate the cross range direction MTRC of a uniformly rotating target by using the phase correcting method. Finally, the sub-aperture imaging algorithm is used to reduce the cross range MTRC in imaging the maneuvering target. Simulation results show that a high resolution result is achieved and the effectiveness of the two dimensional compensation method is verified.

Key words: W-band, ISAR, keystone transform, phase correction, sub-aperture imaging

中图分类号:

TN955+.1

魏一搏;王辉;李宁;禹卫东. 适用于W波段ISAR成像的二维补偿方法[J]. 西安电子科技大学学报, 2016, 43(3): 155-160.

WEI Yibo;WANG Hui;LI Ning;YU Weidong. Two dimension migration compensation method for W-band ISAR imaging[J]. Journal of Xidian University, 2016, 43(3): 155-160.

参考文献

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适用于W波段ISAR成像的二维补偿方法

Two dimension migration compensation method for W-band ISAR imaging

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