我国渤海域微波雷达海杂波功率对数正态分布模化

发布时间：2018-01-23 21:56

本文关键词： 对流层波导微波雷达海杂波对数正态分布　出处：《电波科学学报》2014年05期 　论文类型：期刊论文

【摘要】：对流层波导可以使电磁波在较小的衰减下实现超视距传播,也可能造成雷达盲区,引入干扰,降低雷达、无线电通信系统的性能.因此,海上对流层波导参数的实时探测反演具有重要的意义.利用雷达海杂波反演对流层波导(refractivity from clutter,RFC)是当前国内外研究热点.雷达海杂波作为RFC输入的主要信息,其功率在传播路径上分布的随机特性严重影响反演效果,本文利用2011-06-2011-08和2012-07-2012-11渤海域对流层波导测量数据开展传播路径上雷达海杂波功率分布特性研究,有助于反演.比较测量数据和分布模型的概率密度函数表明,传播路径上的微波雷达海杂波功率不服从雷利分布,而服从对数正态分布.
[Abstract]:Tropospheric waveguides can make electromagnetic waves propagate beyond the visual range under low attenuation, and may cause radar blind area, introduce interference, and reduce the performance of radar and radio communication system. The real-time detection inversion of ocean tropospheric waveguide parameters is of great significance. The radar sea clutter is used to inverse the tropospheric waveguide refractivity from clutter. As the main input information of RFC, the random characteristics of the power distribution on the propagation path seriously affect the inversion effect. In this paper, the data of tropospheric waveguide measurements in the Bohai Sea region 2011-06-2011-08 and 2012-07-2012-11 are used to study the power distribution characteristics of radar sea clutter on the propagation path. Compared with the probability density function of the measured data and the distribution model, it is shown that the microwave radar sea clutter power on the propagation path does not conform to the Rayleigh distribution, but from the logarithmic normal distribution.
【作者单位】：信息工程大学;中国电波传播研究所;北京雷音电子技术开发有限公司;
【基金】：国防重点实验室基金项目(No.9140C860303)
【分类号】：TN958
【正文快照】： 引言对流层波导实质上是一种极端异常的大气折射率垂直剖面结构,其出现概率高、传输损耗小[1].它使得电磁波弯向地面传播,且当曲率大于地球表面的曲率时电磁波会陷获在波导层内跳跃式向前传播,并以较小的传输损耗实现超视距传播,由此可以有效扩展无线电系统探测、通信等的范围

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