非常好的一本入门书籍,写得通俗易懂,希望对大家有所帮助~!
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
II无线通信原理
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
8.1 物理层............................................................................................................................66
8.2 数据链路层....................................................................................................................67
8.3 网络层............................................................................................................................68
8.4 PHS空中接口协议栈....................................................................................................69
附录 ...............................................................................71
1.双共技术...........................................................................................................................71
2.单位换算...........................................................................................................................71
3.缩略语...............................................................................................................................72