Method for calculating scattering characteristics of two-dimensional non-Gaussian rough body target

A technology of target scattering and calculation method, which can be used in complex mathematical operations and other directions, and can solve problems such as difficulty in calculating the scattering characteristics of non-Gaussian distribution rough objects.

Active Publication Date: 2020-05-12
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for calculating the scattering characteristics of a two-dimensional non-Gaussian rough object target, which solves the problem of difficulty in calculating the scattering characteristics of a non-Gaussian distribution rough object in the prior art

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  • Method for calculating scattering characteristics of two-dimensional non-Gaussian rough body target
  • Method for calculating scattering characteristics of two-dimensional non-Gaussian rough body target
  • Method for calculating scattering characteristics of two-dimensional non-Gaussian rough body target

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Embodiment Construction

[0100] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0101] The present invention is a method for calculating the scattering characteristics of a two-dimensional non-Gaussian rough object, such as figure 1 As shown, the specific steps are as follows:

[0102] Step 1, solving the dual-frequency cross-correlation function of the scattering field, the specific steps are as follows:

[0103] Let the incident plane wave is the incident wave vector, k=2π / λ is the free space wave number, λ is the wavelength of the incident wave, and the scattering situation is as follows Figure 2a , Figure 2b shown. Among them, S′ is the average surface of the rough target, S Σ is the undulating surface of the convex target; the vector is the unit external normal vector of the mean surface S′, is the undulating surface S Σ The outer normal vector of ; is the vector distance from the origin of the target...

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Abstract

The invention discloses a method for calculating scattering characteristics of a two-dimensional non-Gaussian rough body target. The method specifically comprises the steps that a scalar Helmholtz equation and physical optical approximation are utilized, coherent and incoherent components of a non-Gaussian distribution rough body target scattering field are obtained through strict theoretical derivation, the ratio of the incoherent components and scattering intensity are normalized, and the scattering characteristics of Gaussian and non-Gaussian distribution rough body targets are compared. Through research on random rough surface scattering characteristics, a theoretical basis is provided for calculation of theoretical modeling of a rough body target with more complex non-Gaussian distribution, laser scattering detection, statistical characteristics of identification and the like.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic scattering on rough surfaces, and in particular relates to a calculation method for the scattering characteristics of a two-dimensional non-Gaussian rough object. Background technique [0002] At present, more and more attention is being paid to the scattering characteristics of complex moving targets in random rough backgrounds. The research on electromagnetic scattering on rough surfaces is of great significance in theoretical analysis and practical applications. It is widely used in military and civil engineering for radio wave propagation, Many fields such as communication, airborne radar and spaceborne radar have promoted the in-depth development of electromagnetic scattering research on random rough surfaces. [0003] Scholars at home and abroad have done a lot of research on the scattering characteristics of Gaussian random rough objects, and the solution methods use Kirchhoff appro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/11G06F17/18
CPCG06F17/11G06F17/18Y02E60/00
Inventor 王明军思黛蓉贺锦涛杨培琦郭镭力
Owner XIAN UNIV OF TECH
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