物联网环境下的室内短距离超宽带信号多径传播信道建模研究

As a rising strategical industry,the Internet of Things(IoT) has been confirmed to be the key orientation of Chinese technological development.Because the indoor short-range propagation is the dominating approach in its transmission and exchanging of information.So it is holded the academic significance and practical value to study the indoor short-range propagation characteristics of Ultra-wideband(UWB) wireless channel for the application's demand of IoT.Based on the novel approximate formula of time-domain reflected coefficient,the method of time-domain ray tracing will be improved in our task.At the same time, the fire-new indoor short-range propagation characteristics of UWB wireless channel will be studied and the multipath model will be established which is comprised by direct ray,reflected ray,diffracted ray and refracted ray.The research content is consisted of three aspects as follow.(1)To the multipath interfering of IoT the indoor short-range multipath characteristics of UWB will be studied,and the corresponding characteristics of various UWB signal will be gotten in indoor short-range propagation entironment.(2)The time-domain refraction coefficient of arbitrary form will be deduced.Then indoor short-range multipath model of UWB comprised by the refraction characteristics will be established.(3)The parameters of statistical characteristic will be abstracted based on the experimental data.Then the time-diversified channel propagation model of UWB will be studied.Moreover,it will be used to modify and the channel model of IEEE 802.15.3a.At least six papers will be published and two invented patents will be applied in our task. Consequently,the academic support will be provided by those research production.

物联网作为新兴战略产业已经被列为我国科技发展的重点方向之一，其信息交互与传输以室内短距离无线传输为主，因此面向物联网的应用需求研究室内短距离超宽带无线信道的传播特性，具有重要的理论意义和实用价值。本课题基于新型时域反射系数改进时域射线跟踪方法，用于研究室内短距离超宽带信号的传播特性，建立包括直射、反射、绕射和透射的时域多径传播信道模型。研究内容包括：(1)针对物联网存在的多径干扰问题研究超宽带信号在室内短距离环境的多径效应, 获取各种超宽带信号的抗多径特性。(2)推导时域透射系数的一般形式，建立包含穿透特性的超宽带信号传播模型。(3)基于实测数据提取统计特征参数，研究室内短距离超宽带时变信道模型，对IEEE 802.15.3a提出的信道模型进行修正和补充。本课题预期至少发表SCI收录论文6篇和申请发明专利2项，研究成果将为物联网背景下的室内短距离无线通信网络规划与优化提供理论依据。

物联网是我国十三五规划的新兴战略产业发展重点方向之一，其信息交互与传输以室内短距离无线传输为主，面向物联网的应用需求研究室内短距离超宽带无线信道的传播特性，具有重要的理论意义和实用价值。本课题基于改进的新型时域射线跟踪方法，研究了室内短距离环境超宽带信号的传播特性，补充完善了包括透射的新型时域多径传播信道模型。研究成果包括如下：（1）基于新型时域射线跟踪方法研究物联网环境室内短距离超宽带无线信道特性，完善了包括直射、反射、绕射和透射的新型时域多径传播模型；（2）基于实测数据提取统计特征参数，研究室内短距离超宽带时变信道模型。与兄弟高校合作开展了室内短距离环境超宽带信道实际测量，对测量数据进行建模和仿真分析，获得了室内短距离超宽带信道模型的特性参数，包括接收功率、路径损耗、功率时延扩展和均方根时延扩展等。（3）本项目取得较好成果，共发表46篇学术论文，其中SCI收录论文11篇，国际会议论文20篇，申请或授权发明专利2项，培养13名硕士。本项目研究不仅可以为超宽带无线通信系统和产品的设计提供理论基础，还可以为室内短距离无线通信网络规划与优化，频谱资源的管理与利用等工作提供有效的实践依据。