室内高密集微功耗传感环境中传播特性与信道特征研究

The heterogeneous sensing environment provides intelligent service by means of the information interaction and the coordinated control between the machine ends. The modeling of channel propagation characteristics is the key to construct the indoor heterogeneous sensing environment. Due to the high density distribution of scatters, the de-normalized spectrum, the sophisticated propagation channel with no universal model, modeling of channel propagation characteristics in indoor heterogeneous sensing environment will become a challenging task. In this project, for constructing the indoor high density sensing environment, the characteristics of high frequency channel are analyzed and a predicted channel model for micro-power sensing environment is established; the propagation characteristics between multi-ends in the high density sensing environment are studied and simulated. The mechanism and compatibility of machine communication in massive sensing environment are explored by means of stochastic geometry method. This project aims to reveal the characteristics of propagation channel in high-density micro-power sensing environment. The methods and techniques based on the new methodology can be used to cover all aspects in the future development of multi-source and high density heterogeneous sensing environment as well, i.e., wireless coverage, cooperative communication, interference suppression and protocol design etc..

异构传感环境通过机器类多物端的信息交互与协同控制，自适应地提供智慧服务。信道传播特性建模是构筑室内异构传感环境的关键。由于散射体高密集分布，频谱占用不规范，信道特性复杂且缺少通用模型，室内异构传感环境中信道传播特性建模将成为挑战性难题。本项目拟对室内高密集物端异构传感环境，分析高频段信道特征，建立微功耗传感环境信道预测模型；研究高密集传感环境中机器类多物端间传播特性及其仿真分析方法；借助随机几何理论，探索大规模传感环境中机器类通信干扰机理与兼容性方法。本项目旨在揭示高密集微功耗传感环境中的信道传播特性，为多源高密集异构传感环境的无线覆盖、信道协作、干扰控制、信号与协议设计等后续工作奠定基础。

异构传感环境通过机器类多物端的信息交互与协同控制，自适应地提供智慧服务。信道传播特性建模是构筑室内异构传感环境的关键。由于散射体高密集分布，频谱占用不规范，信道特性复杂且缺少通用模型，室内异构传感环境中信道传播特性建模将成为挑战性难题。. 本项目针对室内高密集物端异构传感环境，研究室内高密集散射体对小尺度衰落特性影响，基于双跳传播机制，融合各径离开/到达角、时延、功率、多普勒频移等参数，建立多簇信道冲激响应模型。在此基础上，本项目研究室内多个阻碍物叠加对信道衰落的影响，推导信号经多墙衰减后的概率密度函数，并基于傅里叶三角基神经网络建立多墙衰减的频率相关模型。针对高密集传感环境中机器类多物端间传播信道，在建立的上述单链路信道模型基础上，基于发送端转向矢量和接收端特征基之间的耦合特性，建立机器类多物端间信道冲激响应矩阵模型，并分析信道容量和用户正交性与发射端和接收端天线数量的变化规律，阐明机器类多物端间的信道硬化特性。针对大规模传感环境中机器类通信间相互干扰问题，在本项目提出的信道模型基础上，建立有限覆盖范围内有限同层干扰源的干扰模型，确定干扰源的位置和数目，推导上述干扰模型下的目标信号受干扰后的误包率表达式，并分析传输时延、吞吐量等性能指标。. 本项目研究揭示高密集微功耗传感环境中的信道传播特性，为多源高密集异构传感环境的无线覆盖、信道协作、干扰控制、信号与协议设计等后续工作奠定基础。