计算机应用与软件Issue(11)：255-257,294,4.DOI:10.3969/j.issn.1000-386x.2013.11.069
二维改进分形海面电磁散射分形规律分析
ANALYSIS ON FRACTAL RULES OF ELECTROMAGNETIC SCATTERING FROM IMPROVED 2-D FRACTAL SEA SURFACE
摘要
Abstract
Aiming at the problem that the power spectrum of fractal sea surface model cannot satisfy the positive power law when the spatial wave numbers are smaller than the fundamental wave numbers, we propose a 2-D sea surface model which combines the statistical model with the normali-sation band-limited Weierstrass fractal model.It determines the closed-form solutions of surface power spectrum and directional distribution function, and compares the data of surface power spectrum with the data in related literatures .The closed-form solution of the electromagnetic scattering coef-ficient of the model is deduced under the condition of Kirchhoff approximation.The real and imaginary parts of Hurst exponents of the scattering co-efficient which varying along with the time are calculated as well, its fractal dimensionality is then further derived.From the results of simulation it is known that the surface power spectrum fits well with the common spectrum of Pierson-Moskowitz (PM), this validates the effectiveness of the model.The scattered signal maintains some of the fractal characteristics of the fractal sea surface, and its fractal dimensionality equals to the fractal dimensionality of the sea surface minus 1, this provides a new assessment for the detection of sea surface targets .关键词
分形模型/统计模型/电磁散射/分形维数Key words
Fractal model/Statistical model/Electromagnetic scattering/Fractal dimensionality分类
信息技术与安全科学引用本文复制引用
陈瑜,林涛,胡云安,王宏伟..二维改进分形海面电磁散射分形规律分析[J].计算机应用与软件,2013,(11):255-257,294,4.基金项目
军队科研基金项目（61004002）。 （）
