| 微蜂窝环境中无线接收信号的特性分析研究 |
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| 引用本文： | 许放,徐根玖,孙亚星,朱翠影.微蜂窝环境中无线接收信号的特性分析研究[J].数学的实践与认识,2014(14). |
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| 作者姓名： | 许放 徐根玖 孙亚星 朱翠影 |
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| 作者单位： | 西北工业大学航空学院;西北工业大学理学院;西北工业大学计算机学院; |
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| 摘 要： | 基于镜像原理,建立了反向射线追踪模型,同时基于有效反射面的概念,给出了辨别有效像点的充要判据.在包含绕射点路径的处理上,提出绕射路径分解方法,使得模型可以处理多次绕射问题.证明了二维情形下能量与场强之间存在正比关系.通过分析视距传播中的反射情形和非视距传播中的绕射情形,给出计算给定传播途径上接收点处场强的离散化方法.利用单频问题中Rayleigh分布规律,提出通过半经验模型得到的合场强幅值估算概率密度函数的方法.
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| 关 键 词： | 有效反射面 镜像法 绕射路径分解法 随机模拟 Rayleigh分布 离散空间 |
Analysis and Research on Wireless Signal Characteristic in Microcellular Environment |
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| Abstract: | Reverse' ray tracing model based on image method is constructed and effective point judging principles based on effect reflect surface are derived.Diffraction way resolve method dealing with problems containing diffraction points is presented.Direct proportion relationship between energy and field intensity in 2-dimensional case is proved.Field intensity of the receive point of a certain way is calculated considering reflection cases of visibility range and diffraction cases of non-visibility range.With Rayleigh distribution deduced from the single frequency problem,an estimation method for probability density function using semi-empirical model estimated field intensity. |
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| Keywords: | effect reflect surface image method diffract way resolve method stochastic simulation Rayleigh distribution discrete space |
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