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实测海杂波频域分形特性分析

ISSN号：1009-5986
期刊名称：电子与信息学报
时间：0
页码：929-935
分类：TN959.72[电子电信—信号与信息处理;电子电信—信息与通信工程]
作者机构：[1]海军航空工程学院电子信息工程系,烟台264001
相关基金：国家自然科学基金（60802088 61179017）; “泰山学者”建设工程专项经费; 航空科学基金（20095184004）资助课题
相关项目：基于外辐射源的被动制导系统基础理论与关键技术研究

作者：刘宁波|黄勇|关键|何友|Liu Ning-bo Huang Yong Guan Jian He You (Departmen|

关键词：目标检测, 分数布朗运动, 实测海杂波, 频谱, 分形, Target detection, Fractional Brownian motion（FBM）, Real sea clutter, Spectrum, Fractal

中文摘要：

该文主要研究海杂波在频域中的分形特性以及不同参数对频域分形特性的影响。首先,该文以分数布朗运动（FBM）为例,较为系统地阐述了在时域FBM具有分形特性的前提下,FBM频谱也具有分形特性。然后,采用X波段与S波段实测海杂波数据验证频域中海杂波的分形特性,并分析了不同参数对频域海杂波分形特性的影响。结果表明,实测海杂波频谱在统计意义下满足自相似条件,具有分形特性,且频域分形特征对海杂波与目标回波表现出一定的可分性,具有在海杂波微弱目标检测中应用的潜力。

英文摘要：

This paper studies mainly the fractal property of the real sea clutter in frequency domain and the effects of different parameters to the fractal characteristics of the sea clutter spectrum.Firstly,this paper takes Fractional Brownian Motion（FBM） for example and interprets detailedly that the spectrum of the FBM is fractal on condition that the FBM time series is fractal.Then,X-band and S-band real sea clutter are used for the verification of the fractal property of the real sea clutter spectrum.At the same time,the effects of the different parameters are analyzed.The results show that the spectrum of the real sea clutter is self-similar in statistical meaning,namely it is fractal.Additionally,it is found that the fractal characteristics of the sea clutter and target echoes in frequency domain are different to some extent and this difference has the potential for weak target detection within sea clutter.