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注册:2008-8-14
发表于 2012-4-27 10:47:05 |显示全部楼层
移动通信的发展历程...........................................................................................................
......................................................................
2 关于3G ..................................................................................................................................
1 多址方式....................................................................术....................................................................
2 功率控制....................................................................
3.1 频率复用(蜂窝技术) ......................................................................
4 分集技术....................................................................介....................................................................5.1 失去GPS 后的问题....................................................................5.2 备用手段....................................................................
1.1 无线接口....................................................................
1.2 帧和信道....................................................................
3.1 系统消息....................................................................
GSM 基本原理....................................................................
1.1 位置区标识....................................................................2 移动区域定义与识别号....................................................................
2.1 区域定义....................................................................
2.2 移动识别号....................................................................2.4 网络固定设备标识....................................................................识....................................................................2.6 基站侧网络标识..........................................................................................................
2.7 CDMA 网络的编号计划....................................................................
3 移动用户号码簿号码(MDN)................................................................................................... 41
3.1 号码组成..................................................................................................................................................................................
3.3 协议导读...................................................................................................................

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