高仰角对流层散射传播损耗的改进预测方法

发布时间：2018-01-08 09:23

本文关键词：高仰角对流层散射传播损耗的改进预测方法　出处：《电波科学学报》2017年04期 　论文类型：期刊论文

【摘要】：鉴于ITU-R P.617建议只可用来计算低仰角而不适合于高仰角情形下的对流层散射传播损耗,提出了一种适用于高仰角对流层散射传播损耗的改进预测方法.分析了不适用于高仰角情形的原因,发现散射体离收发连线的高度H可能小于离地高度h,而通常的物理含义下Hh.因此根据散射几何模型,替换了原有的散射体高度表达式,在近似条件下令两个散射体高度相等,将新的散射体高度表达式代入计算.链路预测结果表明:改进的简单预测方法极大地改善了原有预测结果,更加接近实验结果,且与适合于高仰角的复杂美国国家标准局(National Bureau of Standards,NBS)方法预测结果基本一致.
[Abstract]:In view of the ITU-R P.617 can be used to suggest only loss Troposcatter calculation of low elevation and not suitable for high elevation situations, improved prediction method is proposed for high elevation tropospheric scatter propagation loss. Analysis the reasons are not suitable for high elevation situation, found scattered in vitro H transceiver connection may be less than the height from the height of H, and the physical meaning of the Hh. usually according to the scattering geometry model, the original scatterer height expression is replaced, in approximate conditions ordered two scatterers of equal height, the new expression highly scattering approach calculation. Link prediction results show that simple improved prediction method has greatly improved the original the prediction results more close to the experimental result, and is suitable for high elevation of the complex National Bureau of standards (National Bureau of Standards, NBS) method of consistent prediction results.

【作者单位】：中国电波传播研究所;中国电波传播研究所电波环境特性及模化技术重点实验室;
【分类号】：TN011.3
【正文快照】： 引言对流层散射传播具有诸如单跳跨距大、保密性好、不怕核爆炸以及不受电离层骚扰等不可替代的优点[1],在军用和民用通信中具有广泛的应用.20世纪50年代起,国外对对流层散射传播这种超视距传播机制以及链路传播损耗计算相关研究开展了大量的试验和理论研究,基于对流层散射传

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