用于三维散射中心SBR建模的边缘绕射修正

doi:10.19665/j.issn1001-2400.2021.02.015

摘要/Abstract

摘要：

传统的基于弹跳射线技术的散射中心提取方法只考虑了目标的物理光学贡献,但物理光学无法描述真实边缘绕射的贡献。综合考虑目标的镜面反射与边缘绕射贡献,提出一种针对基于弹跳射线技术的三维散射中心建模的边缘绕射修正方法。利用弹跳射线技术,结合图像域射线管积分和等效边缘电磁流方法,推导了考虑边缘绕射修正的三维逆合成孔径雷达图像计算公式。仿真实验验证了该方法能够有效地提高三维散射中心的建模精度。

关键词: 边缘绕射修正, 散射中心建模, 射线追踪, 逆合成孔径雷达

Abstract:

In the traditional scattering center extraction method based on the shooting and bouncing ray(SBR) technique,only the physical optics contribution of the target is considered.However,the physical optics method is unable to describe the contribution of the actual edge diffraction.By comprehensively considering the specular reflection and edge diffraction contribution of the target,an edge diffraction correction method for 3D scattering center modeling based on the SBR technique is proposed.Using the SBR technique and combining the image domain ray tube integration and equivalent edge currents method,the edge diffraction correcting formula for the 3D inverse synthetic aperture radar image is derived.Simulation results show that the proposed method is able to effectively improve the modeling accuracy of the 3D scattering center.

Key words: edge diffraction correction, scattering center modeling, ray tracing, inverse synthetic aperture radar

中图分类号:

TN95

陆金文,闫华,殷红成,张磊,董纯柱. 用于三维散射中心SBR建模的边缘绕射修正[J]. 西安电子科技大学学报, 2021, 48(2): 117-124.

LU Jinwen,YAN Hua,YIN Hongcheng,ZHANG Lei,DONG Chunzhu. Edge diffraction correction for 3D scattering center modeling based on the shooting and bouncing ray technique[J]. Journal of Xidian University, 2021, 48(2): 117-124.

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方法	目标类型
方法	立方体		圆柱体		球头锥		带翼组合体
BHALLA方法	5.91	6.67		5.66		4.33
YUN方法	4.97	5.63		4.09		2.76
本文方法	0.97	1.64		1.68		1.43