面向无线传感网的室内复杂环境电波传播特性研究.pdfVIP

摘要 随着智慧地球、感知中国等概念的兴起，物联网引起各国政府部门的广泛关注，已经成 为广大科研工作者们的研究热点之一。无线传感网作为物联网的末梢，经常工作在几乎每一 个可能想象的室内环境中。掌握室内复杂环境的无线传感网的室内电波传播特性可以为物联 网规划与优化提供重要的理论依据。因此，本文基于SBR/Image 方法研究了室内复杂环境的 无线传感网的工作频段电波传播特性，这些特性主要有接收功率、功率时延分布、多径传播 和均方根时延扩展。本文主要研究内容如下： （1）概述无线传感网工作频段电波传播特性的国内外研究现状，介绍射线跟踪方法的基 础理论，讨论了各种射线跟踪方法的优缺点。 （2）详细阐述了基于SBR/Image 方法研究室内复杂环境电波传播特性的计算机实现过 程，在此基础上，介绍电波传播仿真软件Wireless Insite。 （3）在典型楼层室内环境中研究2.44GHz 电波传播特性，获得接收功率分布和均方根时 延扩展分布，并通过仿真结果对比研究绕射对传播路径特性参数分布的影响。 （4）在常见工作室环境中研究3.5GHz 电波传播特性，得到不同接收点处的功率延迟分 布和多径传播路径数据。 （5）在有阻隔墙室内环境中研究5.8GHz 电波传播特性，分别得到视距环境和非视距环 境的接收功率分布、功率时延分布和均方根时延扩展分布，分析讨论了阻隔墙对参数分布等 电波传播特性的影响。 : : 关键词:: 无线传感网；SBR/Image；Wireless Insite；室内复杂环境；电波传播 I Abstract As the emergence of the Smart Earth, Sensing Chinaand other concepts, the internet of things has been got more and more attention by many governments and has been become the scientists research focus. As the tip of the internet of things, Wireless sensor network may has been worked in almost every indoor environment which could be imagined. It will be provided important theoretical basis for wireless network planning and optimization by the knowledge of the radio wave propagation characteristics in complex indoor environment of wireless sensor network. Therefor, in this paper the radio wave propagation characteristics of wireless sensor network operating band in the complex indoor environments has been studied, including received power, power delay distribution and RMS delay spread. The method of SBR/Image has been used to research specific frequency propagation characteristics in indoor complex environments. The content and contribution of the paper are as follows: (1) The research st