[下载]无线通信原理

sequoiashi

目录如下
1．无线信道...................................................................1
1．1 自由空间无线电波传播..................................................................................................1
1．2 移动通信的电波传播特点..............................................................................................1
1．3 移动通信电波传播特性..................................................................................................2
1．3．1 短期（快）衰落................................................................................................3
1．3．2 长期（慢）衰落................................................................................................6
1．3．3 衰落特性............................................................................................................6
1．4 电波传播损耗预测模型..................................................................................................6
1．4．1 Okumura-Hata模型............................................................................................7
1．4．2 COST231 Walfisch-Ikegami模型......................................................................9
1．5 覆盖设计........................................................................................................................10
1．5．1 传播模型的选用及修正..................................................................................11
1．5．1 基站覆盖预测..................................................................................................11
1．5．3 功率控制..........................................................................................................14
2．分集技术.................................................................15
2．1 分集技术的概念............................................................................................................15
2．2 分集技术的分类............................................................................................................15
2．3 显分集技术....................................................................................................................15
2．3．1 空间分集..........................................................................................................15
2．3．2 极化分集..........................................................................................................16
2．4 显分集的合并技术........................................................................................................18
2．4．1 信号合并准则..................................................................................................18
2．4．2 最大信噪比准则下的信号合并方法..............................................................18
2．5 隐分集技术....................................................................................................................19
3．无线通信多址技术.................................................21
3．1  多址技术概述...............................................................................................................21
3．2  频分多址.......................................................................................................................21
3．3  时分多址.......................................................................................................................22
3．4  码分多址.......................................................................................................................22
3．5  扩频技术.......................................................................................................................25
3．6  空分多址.......................................................................................................................27
4．无线通信中的资源分配原理及算法举例.............31
4．1 蜂窝的概念....................................................................................................................31
4．2 以GSM为例介绍FCA ...................................................................................................31
4．3 PHS无线市话的频率使用............................................................................................33
4．3．1 频率分配..........................................................................................................33
4．3．2 PHS  频率指配................................................................................................35
4．4 多信道共用技术............................................................................................................35
4．5 微蜂窝与信道动态分配技术........................................................................................38
5．语音编码技术.........................................................41
5．1 概述................................................................................................................................41
5．2  脉冲编码调制...............................................................................................................43
5．2．1  脉冲编码调制（PCM）技术........................................................................43
5．2．2 自适应差分脉冲编码调制(ADPCM) .............................................................48
6．PHS通信系统中的基本调制技术..........................51
6．1 调制技术概述................................................................................................................51
6．2 π/4-QPSK调制...............................................................................................................52
6．3  衰落和干扰中π/4-DQPSK的性能.............................................................................53
7．天线.........................................................................56
7．1  天线电指标的定义.......................................................................................................56
7．2  天线的高度和间距.......................................................................................................59
7．3 PAS天线选择.................................................................................................................60
7．4 ZXPCS基站天线说明...................................................................................................62
7．4．1  天线电性能技术指标.....................................................................................62
7．4．2  天线环境性能指标.........................................................................................63
8．OSI 7 层结构简介...................................................65