舰船目标三维散射中心建模及SAR快速仿真方法

doi:10.19665/j.issn1001-2400.2021.02.010

西安电子科技大学学报 ›› 2021, Vol. 48 ›› Issue (2): 72-83.doi: 10.19665/j.issn1001-2400.2021.02.010

舰船目标三维散射中心建模及SAR快速仿真方法

胡利平¹(),闫华¹(),钟卫军²(),殷红成¹(),王超¹()

1.北京环境特性研究所电磁散射重点实验室,北京 100854
2.西北工业大学宇航动力学国家重点实验室,陕西西安 710071

收稿日期:2020-10-16 修回日期:2020-12-09 出版日期:2021-04-20 发布日期:2021-04-28
作者简介:胡利平(1979—),女,高级工程师,博士,E-mail: fox_plh@163.com|闫华(1982—),男,高级工程师,博士,E-mail: yanhuabit@126.com|钟卫军(1982—),男,高级工程师,博士,E-mail: 1252525926@qq.com|殷红成(1967—),男,研究员,博士,E-mail: yinhc207@126.com|王超(1979—),男,研究员,博士,E-mail: wangc207@126.com
基金资助:
国家重点研发计划(2018YFC0825804);基础加强计划重点基础研究项目(2020-JCJQ-ZD-087)

Three-dimensional scattering center modeling and a fast SAR simulation method for ship targets

HU Liping¹(),YAN Hua¹(),ZHONG Weijun²(),YIN Hongcheng¹(),WANG Chao¹()

1. Science and Technology on Electromagnetic Scattering Laboratory,Beijing Institute of Environmental Features,Beijing 100854,China
2. State Key Laboratory of Astronautic Dynamics,Northwestern Polytechnical University,Xi’an 710071,China

Received:2020-10-16 Revised:2020-12-09 Online:2021-04-20 Published:2021-04-28

摘要/Abstract

摘要：

直接合成孔径雷达成像仿真方法在实现大型舰船目标回波仿真和合成孔径雷达成像时时效偏低,难以满足对海探测制导闭环验证过程中对合成孔径雷达快速生成的需求。因此,提出了基于三维散射中心的舰船目标合成孔径雷达回波和成像仿真方法。首先通过射线管积分三维快速成像和CLEAN三维散射中心提取得到不同视角下目标三维散射中心;然后通过对应视角合成孔径雷达成像几何建模,快速计算出目标合成孔径雷达回波数据,经成像聚集处理得到目标合成孔径雷达复图像。这种方法综合利用了电磁散射中心提取和完整的合成孔径雷达处理流程,在保持电磁计算精度的条件下,显著提高了目标成像仿真的效率和灵活性。以典型舰船目标为例,验证了该方法的计算精度、效率和灵活性等优势。

关键词: 合成孔径雷达成像仿真, 三维散射中心, 舰船目标

Abstract:

The direct SAR imaging method has a low efficiency when used for realizing the target echo simulation and SAR imaging,which will meet,with difficulty,the requirement of rapid SAR generation in the closed-loop verification process of sea detection guidance.In this paper,we propose a SAR simulation method based on three-dimensional(3D) scatter centers.First of all,the 3D scattering centers of a ship target from different perspectives are obtained by the 3D fast imaging based on the ray tube integral and 3D scattering center extraction based on the CLEAN algorithm.Then,the target SAR echo data and image aggregation processing are quickly calculated to obtain the SAR complex image through the geometric modeling of SAR imaging from the corresponding perspective.The method makes comprehensive use of electromagnetic scattering center extraction and complete SAR processing flow,which can significantly improve the efficiency and flexibility of target imaging simulation under the condition of maintaining the electromagnetic calculation accuracy.The calculation accuracy,efficiency,and flexibility of the proposed method are verified by taking a typical ship target as an example.

Key words: synthetic aperture radar imaging simulation, 3D scattering centers, ship targets

中图分类号:

TN95

胡利平,闫华,钟卫军,殷红成,王超. 舰船目标三维散射中心建模及SAR快速仿真方法[J]. 西安电子科技大学学报, 2021, 48(2): 72-83.

HU Liping,YAN Hua,ZHONG Weijun,YIN Hongcheng,WANG Chao. Three-dimensional scattering center modeling and a fast SAR simulation method for ship targets[J]. Journal of Xidian University, 2021, 48(2): 72-83.

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舰船目标三维散射中心建模及SAR快速仿真方法

Three-dimensional scattering center modeling and a fast SAR simulation method for ship targets

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