【作者】 朱山；

【导师】 刘文予；

【作者基本信息】 华中科技大学 ， 通信与信息系统， 2012， 博士

【摘要】 过去30年间,无线通信业界从学术到技术主要关注蜂窝方式的布网,对于室内无线通信,无论是对传播规律或覆盖特性的研究都亟待深入开展。对于室内无线传播模型的研究,首先是理论模型,香农公式揭示了载波带宽和信号噪声比率构成的对数关系,可以计算出通信容量限,随后许多学者进一步探索并总结出无线传播衰落模型,随着无线通信的发展与繁荣,从单链路到多链路,单任务到多任务,单制式到多制式,室内空间电磁场变得越来越复杂,我们必须寻求一种既科学又可行的研究方法,来开展定性、定量研究,这就是参考理论模型,基于现场实地测量数据,总结出改进的经验预测模型。当然,探索规律的目的是利用自然规律来提高效率,新的动态统计复用方法应运而生。本文的主要研究工作及贡献包括：(1)在经典室内无线传播模型基础上,建立了一种适合于建筑物特点的室内无线信号传播衰落模型,选定地下停车场、购物商场、办公场所、家庭居室等多个典型场景进行无线场强分布测量,根据实测数据拟合反映传播规律的曲线,为建立适用于一般公共场所的无线室内传播预测模型奠定良好基础。(2)构建了包括全波天线校正、多场景实地测量、基于大量数据的分析计算、求取无线传播功率谱特性曲线和时延扩展特性曲线等进程的全套测量体系。提出并形成了一套基于矢量网络分析,适合于研究室内无线传播功率谱特性和时延扩展特性的,便于求解无线传输衰落、系统时延、系统PDP的方法,为室内无线传播模型的创新研究,增强无线传输与覆盖性能分析能力奠定良好基础。(3)在前人基础上,进一步深入分析全IP分组化机制和MAC层无线资源调度处理方法,给出动态统计复用方法的典型实例,提出设立“共享信道”,从而形成两级数抓独立性及多通道流水线并行处理的体系架构,以显著提升系统吞吐率和时延性能,并通过仿真实验和对比分析证明本技术在提升系统主要有效性指中的作用,为提高室内无线传输与覆盖性能提供新的方法与途径。更多还原

【Abstract】 For the past 30 years, the wireless communication industry focus mainly on the cellular network from the academic to technology, in the field of indoor wireless communication, both dissemination rules and coverage characteristics need further research.In indoor wireless communication model research, first thing is the theoretical model, Shannon’s theorem reveals the logarithmic relationship of bandwidth of carrier signal and ratio of noise, and it leads to the way of calculating communication capacity limitation. Then many scholars explore further and summarize the wireless communication fading model, and some scholars put forward on the tracking method to study the light of radio waves propagation paths. But, along with the growth and boom in wireless communication, from single link to multilink, single task to the multitasking, single mode to multimode, interior space electromagnetic fields become more and more complex, we must find out a scientific and feasible research method, to carrying out qualitative and quantitative research and that is what we have done to reference model theory, based on the in-situ measured data, summed up the improved empirical prediction model. Of course, explores the law is the goal of the use of natural law to improve efficiency, therefore, a new dynamic statistical multiplexing method is also generated.The main researches and contributions of the thesis are listed as follows:(1) Based on the classic indoor wireless communication models, indoor wireless propagation fading models are established which are suitable for the indoor building characteristics. Carried out wireless distributed field measurements on underground parkings, shopping malls, offices, family bedrooms, and other typical scenes, fitted curve which reflected the propagation law by using the field test data, lay a solid foundation for building up the wireless indoor spread prediction models which suitable for general public indoor places.(2) Put forward and completed the system of measuring and analytical method including the all wave antenna correction, multiple sites measurement, obtained wireless propagation power spectrum characteristic curve and delay spread characteristic curve based on massive analysis and calculation. Completed the field measurement, formed indoor wireless communication model suitable for indoor building features, carried out analysis and estimation of their performance, the related work has joined Chinese relevant communication system standard proposal.(3) Based on the previous, given further analysis on the all-IP packets individual mechanism and MAC layer wireless resources scheduling processing method, given typical examples on dynamic multiplexing method. proposed method on establish "Shared channel", so as to form the two level data independence and multi-channel line parallel processing system structure, with significantly improve the system throughput rate and time delay performance. And proved the effectiveness that our technology can improve the main performance indexes of the system through simulation experiment and analysis. Provided new method and novel way in order to improve the indoor wireless transmission and coverage performance更多还原