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【转贴】ZXC10-BSS CDMA蜂窝移动通信系统基站子系统客户培训教材(一)【已搜无重复】
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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 [ Last edited by ccjjhh on 2009-3-25 at 14:17 ] |
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