表面粗糙的复杂目标全极化ISAR图像快速仿真

doi:10.7527/S1000-6893.2015.0200

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表面粗糙的复杂目标全极化ISAR图像快速仿真

董纯柱^1,2, 任红梅¹, 殷红成^1,2, 王超¹

1. 电磁散射重点实验室, 北京 100854;
2. 中国传媒大学信息工程学院, 北京 100024

收稿日期:2015-04-09 修回日期:2015-07-15 出版日期:2016-04-15 发布日期:2015-08-06
通讯作者: 董纯柱,Tel.:010-88526475 E-mail:dongcz207@163.com E-mail:dongcz207@163.com
作者简介:董纯柱,男,博士,高级工程师。主要研究方向:电磁散射理论建模、SAR仿真和目标识别。Tel:010-88526475 E-mail:dongcz207@163.com;任红梅,女,博士,研究员。主要研究方向:雷达目标特性和目标识别。Tel:010-88526475 E-mail:rhmei@sina.com;殷红成,男,博士,研究员。主要研究方向:电磁散射与逆散射、雷达目标特性和飞行器隐身技术。E-mail:yinhc207@126.com;王超,男,博士,高级工程师。主要研究方向:雷达目标特性建模与特征分析。E-mail:wangc207@163.com
基金资助:
国家自然科学基金(61490695)

Efficient full-polarized ISAR image simulation of complex target with rough surfaces

DONG Chunzhu^1,2, REN Hongmei¹, YIN Hongcheng^1,2, WANG Chao¹

1. Science and Technology on Electromagnetic Scattering Laboratory, Beijing 100854, China;
2. Information Engineering School, Communication University of China, Beijing 100024, China

Received:2015-04-09 Revised:2015-07-15 Online:2016-04-15 Published:2015-08-06
Supported by:
National Natural Science Foundation of China (61490695)

摘要/Abstract

摘要：

为了获取基于模板图像的车辆、飞机等复杂目标识别所需的海量高质量逆合成孔径雷达(ISAR)图像,提出了表面粗糙的复杂目标全极化ISAR图像快速仿真方法。该方法预先对车辆和飞机等复杂目标表面粗糙程度进行分级定量描述,并以改进的射线弹跳法和等效边缘流法快速预估来自目标粗糙表面的镜面反射和多次反射贡献以及细分边缘的绕射贡献,经相干叠加获得目标的精确电磁散射数据,最后进行成像处理得到高质量全极化ISAR图像。标准体、飞机和车辆目标的仿真实验结果验证了该方法的准确性和有效性。

关键词: 电磁散射, 逆合成孔径雷达(ISAR), 图像仿真, 粗糙面散射, 射线弹跳法

Abstract:

A novel fast evaluation simulation method of full-polarized inverse synthetic aperture radar (ISAR) image is introduced to construct a great number of high-quality ISAR templates required by radar automatic target recognition of complex target such as ground vehicles and aircrafts. Firstly, surface roughness of different parts for complex target is quantitatively described utilizing a roughness-grading-technique. Secondly, the specular and multiple reflection of rough surfaces in addition to that the edge diffraction of piece-wise edges is predicted by an efficiency-improved shooting-bouncing-ray and equivalent edge currents method, which is coherently accumulated to obtain the accurate far-field scattering fields of complex target. Finally, the high-quality full-polarized ISAR images are computed based on these fields. Experimental results of benchmarks, typical aircraft and ground vehicle validate the accuracy and efficiency of the proposed method.

Key words: electromagnetic scattering, inverse synthetic aperture radar (ISAR), image simulation, scattering by rough surface, shooting-bouncing-ray

中图分类号:

V19
TN958

董纯柱, 任红梅, 殷红成, 王超. 表面粗糙的复杂目标全极化ISAR图像快速仿真[J]. 航空学报, 2016, 37(4): 1272-1280.

DONG Chunzhu, REN Hongmei, YIN Hongcheng, WANG Chao. Efficient full-polarized ISAR image simulation of complex target with rough surfaces[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(4): 1272-1280.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

表面粗糙的复杂目标全极化ISAR图像快速仿真

Efficient full-polarized ISAR image simulation of complex target with rough surfaces

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