[1]陈 瑜,胡云安,林 涛,等.二维改进的分形模型在海面电磁散射中的应用[J].南京理工大学学报(自然科学版),2014,38(01):140-146.
 Chen Yu,Hu Yunan,Lin Tao,et al.Application of improved fractal model for electromagnetic scattering from sea surface[J].Journal of Nanjing University of Science and Technology,2014,38(01):140-146.
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二维改进的分形模型在海面电磁散射中的应用
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
38卷
期数:
2014年01期
页码:
140-146
栏目:
出版日期:
2014-02-28

文章信息/Info

Title:
Application of improved fractal model for electromagnetic scattering from sea surface
作者:
陈 瑜1胡云安2林 涛2王宏伟2
1.91213部队,山东 烟台 264001; 2.海军航空工程学院 控制工程系,山东 烟台 264001
Author(s):
Chen Yu1Hu Yunan2Lin Tao2Wang Hongwei2
1.The 91213st Unit of PLA,Yantai 264001,China; 2.Department of Control Engineering, Naval Aeronautical and Astronautical University,Yantai 264001,China
关键词:
分形模型 Longuet-Higgin模型 电磁散射 Kirchhoff近似
Keywords:
fractal model Longuet-Higgin model electromagnetic scattering Kirchhoff approximation
分类号:
O451
摘要:
针对分形海面模型的功率谱在空间波数小于基波波数时不能满足正幂率的问题,提出了一种统计模型和归一化带限Weierstrass分形模型相结合的二维海面模型,确定了方向海谱的闭式解。在满足基尔霍夫近似的条件下推导了改进海面模型的散射系数和散射强度系数的闭式解。从仿真结果可知:所得功率谱与PM谱和南海的实测数据都拟合的很好,验证了该模型的正确性,并且海面的分形特性也能在散射信号中得到很好的表现。
Abstract:
Aiming at the problem that the ominidirectional sea-wave spectrum of fractal sea-wave model can not satisfy the positive power law when spatial wave numbers are smaller than the fundamental wave number,a 2-D sea surface model is proposed by combining statistical sea surface model and normalization band-limited Weierstrass-Mandelbrot(WM)fractal sea surface model.With the proposed method,the closed form expression of the directional sea-wave spectrum is calculated.Scattering coefficients and scattering intensity coefficients of the improved sea surface model based on the Kirchhoff approximation are derived.Simulation results show that omnidirectional sea-wave spectrum is in good agreement with the common spectrum of Pierson-Moskowitz(PM)and the real data of the South China Sea.This proves the validity of the improved model,and the fractal characteristics of sea surface is also well represented in the scattering signal.

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备注/Memo

备注/Memo:
收稿日期:2012-07-09 修回日期:2012-10-10
基金项目:军队科研基金资助项目
作者简介:陈瑜(1982-),女,博士生,主要研究方向:目标与环境电磁散射方面的研究,E-mail:chenyu8879@sohu.com。
引文格式:陈瑜,胡云安,林涛,等.二维改进的分形模型在海面电磁散射中的应用[J].南京理工大学学报,2014,38(1):140-146.
投稿网址:http://njlgdxxb.paperonce.org
更新日期/Last Update: 2014-02-28