ZXC10-BSS CDMA 蜂窝移动通信系统基站子系统客户培训教材 原理篇

ccjjhh-79650

ZXC10-BSS CDMA 蜂窝移动通信系统基站子系统客户培训教材? 原理篇
中兴通讯股份有限公司
page:117
pdf
目 录
第1 章 CDMA 概述....................................................................................................................................1
1.1 引言....................................................................................................................................................1
1.2 移动通信发展史及CDMA 标准.......................................................................................................1
1.2.1 第一代蜂窝移动通信系统.......................................................................................................2
1.2.2 第二代蜂窝移动通信系统.......................................................................................................2
1.2.3 第三代蜂窝移动通信系统及CDMA 标准.............................................................................2
1.3 ZTE 和cdma2000...............................................................................................................................6
1.3.1 中兴cdma2000 研发历史........................................................................................................6
1.3.2 中兴cdma2000 产品概述........................................................................................................7
复习题......................................................................................................................................................8
第2 章 CDMA 基本原理.............................................................................................................................9
2.1 引言....................................................................................................................................................9
2.2 扩频通信技术....................................................................................................................................9
2.2.1 扩频通信的理论基础...............................................................................................................9
2.2.2 扩频与解扩频过程.................................................................................................................10
2.2.3 处理增益与抗干扰容限.........................................................................................................11
2.2.4 扩频通信技术特点.................................................................................................................11
2.3 多址技术..........................................................................................................................................12
2.4 CDMA 系统的实现...........................................................................................................................13
2.4.1 CDMA 扩频通信原理.............................................................................................................13
2.4.2 CDMA 扩频码的选择.............................................................................................................14
2.5 语音编码技术..................................................................................................................................18
2.6 信道编码技术..................................................................................................................................19
2.6.1 移动通信信道特点.................................................................................................................20
2.6.2 循环冗余校验.........................................................................................................................22
2.6.3 卷积编码................................................................................................................................22
2.6.4 块交织技术.............................................................................................................................23
2.6.5 Turbo 码..................................................................................................................................23
ii
复习题.................................................................................................................................................... 27
第3 章 IS-95 系统原理.............................................................................................................................. 29
3.1 引言................................................................................................................................................. 29
3.2 IS-95 系统概述................................................................................................................................ 29
3.3 IS-95 系统空中接口参数................................................................................................................. 29
3.4 前向信道......................................................................................................................................... 30
3.4.1 信道种类及功能.................................................................................................................... 30
3.4.2 信道帧结构............................................................................................................................ 31
3.4.3 信道编码、调制.................................................................................................................... 32
3.5 反向信道......................................................................................................................................... 37
3.5.1 信道种类及功能.................................................................................................................... 37
3.5.2 信道帧结构............................................................................................................................ 37
3.5.3 信道编码、调制.................................................................................................................... 37
3.6 反向信道与前向信道的比较.......................................................................................................... 40
3.7 业务流程......................................................................................................................................... 41
3.7.1 主叫流程................................................................................................................................ 41
3.7.2 被叫流程................................................................................................................................ 43
3.7.3 挂机流程................................................................................................................................ 45
3.7.4 登记流程................................................................................................................................ 46
复习题.................................................................................................................................................... 46
第4 章 cdma2000 1x 系统原理................................................................................................................. 47
4.1 引言................................................................................................................................................. 47
4.2 系统概述......................................................................................................................................... 47
4.3 空中接口参数................................................................................................................................. 48
4.4 前向信道......................................................................................................................................... 48
4.4.1 信道种类及功能.................................................................................................................... 48
4.4.2 信道帧结构............................................................................................................................ 50
4.4.3 信道编码、调制.................................................................................................................... 53
4.5 反向信道......................................................................................................................................... 56
4.5.1 信道种类及功能.................................................................................................................... 56
4.5.2 信道帧结构............................................................................................................................ 57
iii
4.5.3 信道编码、调制.....................................................................................................................60
4.6 技术特点..........................................................................................................................................63
4.7 业务流程..........................................................................................................................................64
4.7.1 语音业务流程.........................................................................................................................64
4.7.2 数据业务流程.........................................................................................................................69
复习题....................................................................................................................................................76
第5 章 CDMA 关键技术及优点...............................................................................................................77
5.1 引言..................................................................................................................................................77
5.2 关键技术..........................................................................................................................................77
5.2.1 功率控制................................................................................................................................77
5.2.2 分集接收................................................................................................................................90
5.2.3 软切换....................................................................................................................................94
5.2.4 其它关键技术.......................................................................................................................101
5.3 CDMA 系统优点.............................................................................................................................103
5.3.1 独特频率复用.......................................................................................................................104
5.3.2 覆盖范围广...........................................................................................................................104
5.3.3 容量大..................................................................................................................................105
5.3.4 语音质量好...........................................................................................................................105
5.3.5 保密性好...............................................................................................................................106
5.3.6 用户满意度...........................................................................................................................106
5.3.7 经济性..................................................................................................................................107
复习题..................................................................................................................................................107
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