用于线阵三维SAR成像的二维快速ESPRIT算法

赵逸超; 朱宇涛; 粟毅; 杨猛

doi:10.12000/JR15065

用于线阵三维SAR成像的二维快速ESPRIT算法

doi: 10.12000/JR15065

(国防科学技术大学电子科学与工程学院长沙 410073)

基金项目:

中国博士后科学基金(2014M562647)

详细信息

作者简介:
赵逸超(1990-),男,陕西汉中人。2013年在浙江大学获得学士学位。现为国防科技大学硕士研究生,研究方向为线阵三维SAR超分辨成像技术。E-mail:zhaoyichao1212@163.com朱宇涛,男,现为国防科技大学博士后,主要研究方向为阵列设计、遥感信息处理。E-mail:zhu_yu_tao@126.com粟毅,男,现为国防科技大学教授,博士生导师,主要研究方向为信号处理、雷达系统、遥感信息处理。E-mail:yi.su@yeah.net

通讯作者:
赵逸超zhaoyichao1212@163.com

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出版历程
- 收稿日期: 2015-05-27
- 修回日期: 2015-09-22
- 网络出版日期: 2015-10-28

Two-dimensional Fast ESPRIT Algorithm for Linear Array SAR Imaging

(School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)

Funds:

China Postdoctoral Science Foundation (2014M562647)

摘要

摘要: 线阵3维SAR系统可实现对地面场景的3维成像,是近年来研究的热点。但受载机平台和硬件条件的限制,其切航迹向和沿航迹向的分辨率难以提高。为了改善2维分辨率,该文提出了一种用于线阵3维SAR成像的2维快速ESPRIT算法,首先结合盖式圆方法和ESPRIT算法估计出点目标在切航迹向和沿航迹向位置,并通过该文改进的基于区域生长的2维位置配对方法替代最小二乘法快速求得目标散射系数,实现线阵2维SAR切航迹向和沿航迹向超分辨成像。该算法具有分辨精度高、运算速度快、实时性能好等优点。仿真实验证明了其有效性。
- 线阵3维SAR /
- ESPRIT算法 /
- 超分辨 /
- 成像 /
- 区域生长
Abstract: The linear array Synthetic Aperture Radar (SAR) system is a popular research tool, because it can realize three-dimensional imaging. However, owning to limitations of the aircraft platform and actual conditions, resolution improvement is difficult in cross-track and along-track directions. In this study, a twodimensional fast Estimation of Signal Parameters by Rotational Invariance Technique (ESPRIT) algorithm for linear array SAR imaging is proposed to overcome these limitations. This approach combines the Gerschgorin disks method and the ESPRIT algorithm to estimate the positions of scatterers in cross and along-rack directions. Moreover, the reflectivity of scatterers is obtained by a modified pairing method based on region growing, replacing the least-squares method. The simulation results demonstrate the applicability of the algorithm with high resolution, quick calculation, and good real-time response.
- Linear Array SAR (LASAR) /
- Estimation of Signal Parameters by Rotational Invariance Technique(ESPRIT) algorithm /
- Superresulotion /
- Imaging /
- Region growing

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参考文献(18)

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