无线超宽带系统信道模型仿真研究

目

摘

录

要............................................................................................................................I

ABSTRACT......................................................................................................................II引言..............................................................................................................................11绪论............................................................................................................................2

1.1无线信道的概念.............................................................................................21.2超宽带通信......................................................................................................2

1.2.1超宽带通信的技术背景.......................................................................21.2.2超宽带的概念......................................................................................31.2.3超宽带的技术特点..............................................................................41.2.4超宽带技术研究应用最新进展..........................................................6

2UWB信道特性分析.....................................................................................................7

2.1UWB信道的电波传输概述..............................................................................72.2两种UWB系统结构及其信道特点..................................................................7

2.2.1DS-UWB系统结构及信道特点.............................................................82.2.2MB－UWB系统及信道特点...................................................................92.3UWB多径信道................................................................................................10

2.3.1UWB多径信道的多径效应.................................................................102.3.2UWB室内多径信道统计特性.............................................................10

3超宽带无线电多径信道传播..................................................................................12

3.1超宽带信号传播特性....................................................................................12

3.1.1室内无线传播的基本特点.................................................................123.1.2室内电磁波的传播机制.....................................................................123.1.3超宽带无线信号的传播特点.............................................................133.2超宽带无线电多径信道的参数....................................................................14

3.2.1冲激响应............................................................................................143.2.2总多径增益.........................................................................................153.2.3均方根时延扩展.................................................................................163.2.4功率延迟剖面....................................................................................163.2.5离散时间冲激响应.............................................................................163.3超宽带信道建模...........................................................................................17

3.3.1对信道模型的基本要求.....................................................................173.3.2超宽带信道建模技术........................................................................173.3.3

S-V室内信道模型...........................................................................18