基于弹跳射线技术的三维GTD模型构建方法

doi:10.12305/j.issn.1001-506X.2021.08.02

Abstract

Abstract:

The traditional scattering center extraction method based on shooting and bouncing ray (SBR) technique only considers the ideal point model, which is unable to describe the frequency dependence of scattering centers. Therefore, a SBR-based method of three dimensional geometrical theory of diffraction (3D-GTD) model construction is proposed. Based on the ideal point model obtained by the traditional method, using ray-tube data, the frequency dependence parameters are forward determined and the down-range locations are corrected for scattering centers. The construction of high-precision 3D-GTD model is achieved. Simulation results show that the 3D-GTD model constructed at single frequency and single view can not only precisely reconstruct radar cross section (RCS) data under the same conditions, but also achieve RCS extrapolation within a wide frequency band. The proposed method is able to meet the application requirements of efficient compression and fast reconstruction of wide-band target scattering data.

Key words: scattering center modeling, three dimensional geometrical theory of diffraction (3D-GTD) model, down-range location correction, shooting and bouncing ray (SBR) technique

CLC Number:

TN95

Jinwen LU, Hua YAN, Lei ZHANG, Hongcheng YIN. 3D-GTD model construction method using the shooting and bouncing ray technique[J]. Systems Engineering and Electronics, 2021, 43(8): 2028-2036.

Figures/Tables 15

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机理类型	机理名称	几何结构示意	α_n
单次反射	FS		1.0
	SS		0.5
	DS		0
二次反射	FS-FS		1.0
	SS-FS		0.5
	SS-SS		0.5
	DS-FS		0
	DS-SS		0
	DS-DS		0

方法	计算频点数	计算时间/s	模型大小/kB
Yun方法	401	1 058.6	140.90
本文方法	1	2.8	0.35

方法	计算频点数	计算时间/s	模型大小/kB
Yun方法	401	1 307.3	435.54
本文方法	1	3.4	0.91

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3D-GTD model construction method using the shooting and bouncing ray technique

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