典型室内场景下无线多跳网络阴影衰落相关性建模

发布时间：2018-03-10 00:01

本文选题：无线多跳网络　切入点：空间损耗场　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：无线多跳网络技术是当前无线通信领域发展最迅速的关键技术之一,具有自组织能力强、部署成本低、消耗能量少、自愈能力强等特点,是传统无线网络无法比拟的。无线通信链路的衰落特性是制约系统通信性能的根本因素,其中路径损耗和阴影衰落的影响尤为突出。当前无线多跳网络的研究中,关于路径损耗的研究较为成熟,对阴影衰落相关性却很少关注,而这一缺失将可能导致对位置相近链路性能的评估出现偏差,进而给网络节点的连通性分析和网络拓扑分析带来错误。因此在无线多跳网络研究中需要对通信环境中的阴影衰落相关特性进行深入系统性分析。本文首先简要介绍了无线多跳网络技术的产生及发展历程,然后分析了无线多跳网络研究过程中存在的问题及当前的解决办法。明确了阴影衰落及其相关性在无线多跳网络研究中的重要性,应当给予足够的重视和全面的考虑。其次对当前的阴影衰落相关性模型做了综述,并指出了这些模型在考虑相关因素时的不足和在应用领域的局限性,通过引入空间损耗场理论,提出全新的无线多跳网络阴影衰落相关性模型。然后设计合理、可行的实验方案,选取典型室内场景,运用i Build Net无线网络专业仿真软件进行仿真实验,通过对实验结果的处理获取阴影衰落相关性模型的相关参数,从而得到典型室内场景下的阴影衰落相关性模型。最后对所得模型进行实验验证,运用i Build Net软件进行仿真实验并提取实验结果,进行数据处理得到不同几何关系下链路对的相关性,通过与由模型计算得到的相关系数进行对比分析,对模型的可行性进行论证。二者能够较好地保持一致,这说明本文提出的理论模型是合理的。本研究得到典型室内场景下阴影衰落相关性模型。该模型可用于典型室内场景阴影衰落的评估,为室内场景下无线多跳网络的节点布设、路由选择和性能评估提供指导和借鉴。
[Abstract]:Wireless multi-hop network technology is one of the most rapidly developing key technologies in the field of wireless communication. It has the characteristics of strong self-organization ability, low deployment cost, low energy consumption, strong self-healing ability, etc. The fading characteristic of wireless communication link is the basic factor that restricts the communication performance of the system, especially the influence of path loss and shadow fading. The research on path loss is more mature, but little attention is paid to the correlation of shadow fading, which may lead to the deviation of the performance evaluation of the near link. Therefore, in the research of wireless multi-hop networks, it is necessary to make a deep and systematic analysis of the correlation characteristics of shadow fading in the communication environment. Firstly, this paper briefly analyzes the characteristics of shadow fading in wireless multi-hop networks. This paper introduces the emergence and development of wireless multi-hop network technology. Then the existing problems and current solutions in the research of wireless multi-hop networks are analyzed, and the importance of shadow fading and its correlation in the research of wireless multi-hop networks is clarified. Adequate attention and comprehensive consideration should be given. Secondly, the current models of shadow fading correlation are reviewed, and the shortcomings of these models in the consideration of relevant factors and their limitations in the field of application are pointed out. By introducing the spatial loss field theory, a new shadow fading correlation model of wireless multi-hop network is proposed, and a reasonable and feasible experimental scheme is designed to select the typical indoor scene. I Build Net wireless network simulation software is used to carry out simulation experiments, and the parameters of the correlation model of shadow fading are obtained by processing the experimental results. The correlation model of shadow fading in typical indoor scenes is obtained. Finally, the model is verified by experiments. I Build Net software is used to carry out simulation experiments and extract the experimental results. The correlation of link pairs under different geometric relationships is obtained by data processing, and the feasibility of the model is demonstrated by comparing and analyzing the correlation coefficients calculated from the model. This model can be used to evaluate the shadow fading of typical indoor scene, and the nodes of wireless multi-hop network in indoor scene can be set up. Routing and performance evaluation provide guidance and reference.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92

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