An Interferometric Inverse Synthetic Aperture Radar Imaging Algorithm for Squint Model

李丽亚; 刘宏伟; 纠博; 吴顺君

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An Interferometric Inverse Synthetic Aperture Radar Imaging Algorithm for Squint Model

更新时间：2025-12-08

- An Interferometric Inverse Synthetic Aperture Radar Imaging Algorithm for Squint Model
- Vol. 42, Issue 10, Pages: 1290-1294(2008)
- 作者机构：
  
  西安电子科技大学雷达信号处理国家重点实验室,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN958
- Online First：10 October 2008，
  
  Published：2008
- 稿件说明：
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李丽亚, 刘宏伟, 纠博, et al. An Interferometric Inverse Synthetic Aperture Radar Imaging Algorithm for Squint Model[J]. 2008, 42(10): 1290-1294.
DOI：

李丽亚, 刘宏伟, 纠博, et al. An Interferometric Inverse Synthetic Aperture Radar Imaging Algorithm for Squint Model[J]. 2008, 42(10): 1290-1294. DOI：

摘要

针对雷达在斜视工作下的干涉相位模糊问题

提出了一种新的特显点干涉逆合成孔径雷达(ISAR)成像算法.该算法利用特显点信噪比较高、干涉相位估计值较为准确的特性

根据特显点的多普勒频率和横距信息拟合得到目标的多普勒频率与横距的关系

从而对整幅ISAR像进行横向定标

得到目标的干涉ISAR像.该算法能消除干涉相位缠绕

而且对噪声具有较强的鲁棒性

同经典的干涉ISAR成像算法相比

在正确成像时

该算法所需的信噪比可降低10～15 dB.

Abstract

Aiming at the interferometric phase wrapping in squint model

a novel interferometric inverse synthetic aperture radar(ISAR)imaging algorithm based on dominant scatterers is proposed. By using the higher level of signal-to-noise ratio(SNR)and the more accurate interferometric phase estimations of dominant scatterers

the relationship between the target's Doppler frequency and the cross range is obtained based on the information about Doppler frequency and the cross range at dominant scatterers. The whole ISAR image can be scaled

and then

the interferometric ISAR image is obtained. The proposed algorithm can not only eliminate the phase wrapping

but also be robust to noise. Compared with the traditional interferometric ISAR imaging algorithms

the SNR that is required in the proposed algorithm is decreased by 10-15 dB when the vivid image is generated.

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references

保铮,邢孟道,王彤.雷达成像技术[M]. 北京:电子工业出版社,2005.

姜正林,保铮.低分辨雷达成像定标算法性能分析[J].西安电子科技大学学报, 2000, 27(6): 677-681.

JIANG Zhenglin, BAO Zheng.Performance analysis of the method of cross-range scaling of low resolution radar [J].Journal of Xidian University, 2000, 27(6): 677-681.

WANG Genyuan,XIA Xianggen,Chen V C.Three-dimensional ISAR imaging of maneuvering targets using three receivers [J].IEEE Trans on Image Processing, 2001, 10(3):436-447.

张群,马长征,张涛,等.干涉式逆合成孔径雷达三维成像技术研究[J].电子与信息学报, 2001, 23(9): 890-898.

ZHANG Qun,MA Changzheng,ZHANG Tao,et al.Research on 3-D imaging technique for interferometric inverse synthetic aperture radar [J].Journal of Electronics and Information Technology, 2001, 23(9): 890-898.

ZHANG Qun,YEO T S, DU Gan,et al.Estimation of three-dimensional motion parameters in interferometric ISAR imaging [J].IEEE Trans on Geoscience and Remote Sensing, 2004, 42(2): 292-300.

FORNARO G, FRANCESCHETTI G, LANARI R. Interferometric SAR phase unwrapping using Green's formulation [J].IEEE Trans on Geoscience and Remote Sensing, 1996, 34(3): 720-727.

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