【资料名称】：ZXC10 BSSB(V8.0.3.400)基站系统基本原理

【资料作者】：中兴

【资料日期】：2010

【资料语言】：中文

【资料格式】：PDF

【资料目录和简介】：

1 CDMA概述.........................................................................................1-1
1.1 移动通信发展历史..............................................................................................1-1
1.2 三种移动通信标准..............................................................................................1-2
1.2.1 WCDMA ..................................................................................................1-2
1.2.2 TD-SCDMA .............................................................................................1-3
1.2.3 cdma2000 ..................................................................................................1-3
1.3 cdma2000标准演进..............................................................................................1-4
1.4 cdma2000特点和优势...........................................................................................1-5
1.5 cdma2000频率分配..............................................................................................1-7
1.5.1 800MHz频率分配......................................................................................1-7
1.5.2 450MHz频率分配.....................................................................................1-8
1.5.3 1900MHz频率分配.....................................................................................1-9
1.5.4 GoTa频率分配..........................................................................................1-9
2 CDMA基本原理..................................................................................2-1
2.1 多址技术............................................................................................................2-1
2.1.1 FDMA ......................................................................................................2-2
2.1.2 TDMA......................................................................................................2-2
2.1.3 CDMA......................................................................................................2-3
2.2 扩频通信理论.....................................................................................................2-3
2.2.1 扩频通信定义...........................................................................................2-3
2.2.2 扩频通信基本原理....................................................................................2-4
2.2.3 扩频通信理论基础....................................................................................2-5
2.2.4 处理增益和抗干扰容限..............................................................................2-6
2.3 伪随机序列的设计及特性....................................................................................2-6
2.3.1 移位寄存器序列........................................................................................2-6
2.3.2 自相关特性............................................................................................. 2-10
2.3.3 互相关特性............................................................................................. 2-11
2.3.4 m序列的特征.......................................................................................... 2-12

2.4 CDMA中的扩频码............................................................................................ 2-13
2.4.1 Walsh码.................................................................................................. 2-13
2.4.2 PN短码.................................................................................................. 2-14
2.4.3 PN长码.................................................................................................. 2-16
2.4.4 三种扩频码的比较.................................................................................. 2-17
2.5 CDMA语音编码技术......................................................................................... 2-18
2.5.1 声码器的功能......................................................................................... 2-18
2.5.2 A1和A2接口的语音编码技术.................................................................... 2-19
2.5.3 Ap接口的TrFO........................................................................................ 2-19
2.5.4 Ap接口的RTO ........................................................................................ 2-20
3 CDMA关键技术..................................................................................3-1
3.1 CDMA功率控制..................................................................................................3-1
3.1.1 功率控制的作用........................................................................................3-1
3.1.2 1X前向快速功率控制................................................................................3-2
3.1.3 反向功率控制...........................................................................................3-5
3.2 CDMA软切换................................................................................................... 3-10
3.2.1 切换的作用............................................................................................. 3-10
3.2.2 切换基本概念......................................................................................... 3-10
3.2.3 切换类型................................................................................................ 3-12
3.3 分集接收.......................................................................................................... 3-23
3.3.1 基本概念................................................................................................ 3-23
3.3.2 分集类型................................................................................................ 3-24
3.3.3 分集接收技术......................................................................................... 3-26
4 cdma2000 1X基本原理.........................................................................4-1
4.1 信道调制和编码过程...........................................................................................4-1
4.1.1 卷积编码..................................................................................................4-2
4.1.2 Turbo编码.................................................................................................4-2
4.1.3 块交织......................................................................................................4-5
4.1.4 扰码.........................................................................................................4-7
4.1.5 扩频.........................................................................................................4-7
4.1.6 调制.........................................................................................................4-7
4.2 IS-95信道...........................................................................................................4-8
II
4.2.1 前向信道................................................................................................ 4-10
4.2.2 反向信道................................................................................................ 4-15
4.3 移动台状态变迁流程......................................................................................... 4-20
4.4 cdma2000 1x的特性............................................................................................ 4-21
4.5 cdma2000 1x信道............................................................................................... 4-22
4.6 商用系统里使用的cdma2000新增信道................................................................. 4-25
4.6.1 快速寻呼信道......................................................................................... 4-25
4.6.2 前向补充信道......................................................................................... 4-25
4.6.3 反向导频信道......................................................................................... 4-26
4.6.4 反向补充信道......................................................................................... 4-27
4.7 扩频速率和无线配置......................................................................................... 4-27
5 cdma2000 1xEV-DO基本原理..............................................................5-1
5.1 1xEV-DO系统概述.............................................................................................5-1
5.1.1 1xEV-DO设计思想...................................................................................5-1
5.1.2 1xEV-DO与IS-95/1X网络的兼容性...........................................................5-3
5.1.3 EV-DO的特点..........................................................................................5-3
5.2 1xEV-DO Release 0 .............................................................................................5-4
5.2.1 1xEV-DO Release 0网络参考模型...............................................................5-4
5.2.2 1xEV-DO Release 0空中接口协议模型...................................................... 5-11
5.2.3 1xEV-DO Release 0前向信道................................................................... 5-13
5.2.4 1xEV-DO Release 0反向信道................................................................... 5-22
5.2.5 1xEV-DO Release 0空中接口关键技术...................................................... 5-32
5.2.6 1xEV-DO组网与混合终端选网................................................................ 5-40
5.3 1xEV-DO Rev.A ............................................................................................... 5-43
5.3.1 1xEV-DO Release 0功能限制................................................................... 5-43
5.3.2 1xEV-DO Rev.A技术改进....................................................................... 5-44
5.3.3 1xEV-DO Rev.A空中接口协议模型.......................................................... 5-45
5.3.4 1xEV-DO Rev.A前向信道....................................................................... 5-50
5.3.5 1xEV-DO Rev.A前向链路物理层............................................................. 5-51
5.3.6 1xEV-DO Rev.A反向信道....................................................................... 5-55
5.3.7 1xEV-DO Rev.A反向链路物理层............................................................. 5-57
5.3.8 1xEV-DO Rev.A关键技术....................................................................... 5-62
III
5.3.9 1xEV-DO Rev.A特色业务....................................................................... 5-73
5.4 1xEV-DO Rev.B ............................................................................................... 5-75
5.4.1 1xEV-DO Rev.B定义.............................................................................. 5-75
5.4.2 1xEV-DO Rev.B关键技术....................................................................... 5-75
图目录................................................................................................................................................................... II
表目录................................................................................................................................................................VII
缩略语表..............................................................................................IX