陈勇2,,
李胜2,,
胡利平2,,
李焕敏2,,
殷红成1,2,
①.中国传媒大学信息工程学院 ??北京 ??100024
②.电磁散射重点实验室 ??北京 ??100854
基金项目:国家自然科学基金(61490690, 61490695)，国防基础科研计划(JCKY2016204C302)
详细信息
作者简介:闫华：闫 华(1981–)，男，电磁散射重点实验室高级工程师，中国传媒大学信息工程学院在职博士生。研究方向为雷达目标散射特性、计算电磁学、特征提取、参数化建模等。E-mail: yanhuabit@126.com
陈勇：陈 勇(1983–)，男，硕士，电磁散射重点实验室高级工程师，研究方向为目标与环境电磁散射理论建模与数值计算。E-mail: yonche@163.com
李胜：李 胜(1980–)，男，硕士，电磁散射重点实验室高级工程师，研究方向为雷达目标特征控制、特征提取等。E-mail: lisheng2008@sina.com
胡利平(1979–)，女，博士，电磁散射重点实验室高级工程师，研究方向为SAR图像处理、目标检测与目标识别等。E-mail: fox_plh@163.com
李焕敏(1987–)，女，硕士，电磁散射重点实验室工程师，研究方向为雷达目标散射特性、舰船目标建模、目标模拟等。E-mail: huanminli@126.com
殷红成(1967–)，男，博士，电磁散射重点实验室研究员，研究方向为雷达目标特性、计算电磁学、目标识别等。E-mail: yinhc207@126.com
通讯作者:闫华 ? yanhuabit@126.com
中图分类号:TN95计量
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被引次数:0
出版历程
收稿日期:2018-09-20
修回日期:2018-10-29
网络出版日期:2018-12-07
A Fast Algorithm for Establishing 3-D Scattering Center Model for Ship Targets over Sea Surface Using the Shooting and Bouncing Ray Technique
YAN Hua1,2,,,CHEN Yong2,,
LI Sheng2,,
HU Liping2,,
LI Huanmin2,,
YIN Hongcheng1,2,
①. Information Engineering School, Communication University of China, Beijing 100024, China
②. Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China
Funds:The National Natural Science Foundation of China (61490690, 61490695), Defense Industrial Technology Development Program (JCKY2016204C302)
More Information
Corresponding author:YAN Hua, yanhuabit@126.com
摘要
摘要:海面舰船目标3维散射中心的快速建模对雷达目标信号快速仿真、特征提取与分类识别等应用具有重要意义。该文结合目标-海面耦合散射的“4路径”模型、随机海面散射修正Fresnel反射系数模型，以及基于射线管积分的快速3维成像等模型与方法，提出一种舰船-海面复合的快速3维成像方法，并通过CLEAN算法建立一种3维散射中心快速建模算法。该算法由于实现了单频、单视角条件下的目标3维成像，并且采用简化的海面模型避免了大量海面面元的构建，因而大大提高了3维散射中心建模的计算效率，从而满足实际工程应用的需求。典型海面舰船目标仿真实验结果表明，与传统基于FFT的3维成像算法相比，在典型计算条件下该算法的计算效率可提高4个数量级。不同海情下，3维散射中心重建的与直接仿真计算的1维距离像历程图和2维像的对比结果，也验证了算法的计算精度。
关键词:海面舰船目标/
3维散射中心建模/
“4路径”模型/
射线管积分/
CLEAN算法
Abstract:Fast construction of the 3-D scattering centers of ship targets on the sea surface is important for many radar applications, including the fast signature prediction, feature extraction, and automatic recognition of targets. Combining the " four-path” model for target-surface coupling scattering with modified Fresnel reflection coefficient model in the stochastic sea surface and ray tube integration method, we propose a 3-D image formation method for ship-surface compound targets. Using the CLEAN technique on 3-D image, we develop a fast algorithm for establishing 3-D scattering center model for ship targets on the sea surface. Because this algorithm realizes 3D imaging of targets at a single frequency and single aspect angle, and adopts simplified surface model to avoid the need to construct a large number of surface elements, the computational efficiency of the proposed alogrithm is greatly increased to meet the needs of practical engineering applications. Simulation experiments of a typical ship target show that the proposed algorithm can increase the speed by four orders of magnitude under typical conditions, as compared with the traditional FFT-based 3D imaging method. We validate the accuracy of this algorithm by comparing reconstructed 1-D range profiles and ISAR images obtain by the scattering center model with the ones that are directly simulated.
Key words:Ship target over sea surface/
3-D scattering center model/
" Four Path” model/
Ray tube Integration/
CLEAN algorithm
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