WCDMA的捕获、同步和切换

maychristmas

目录
1.物理层定时和同步过程.......................................................3
1.1基站下行定时............................................................3
1.2下行扰码................................................................3
1.3同步码..................................................................5
1.3.1时隙同步............................................................8
1.3.2帧同步..............................................................9
2.WCDMA接入过程..............................................................9
2.1随机接入................................................................9
2.1.1随机接入导言信号...................................................10
2.1.2随机接入扰码.......................................................11
2.1.3捕获指示信道.......................................................12
2.1.4随机接入信息.......................................................12
2.1.5随机接入偏置定时...................................................13
2.2捕获，同步和物理层过程.................................................14
2.2.1 UE捕获和同步.......................................................14
2.2.2 UE请求系统接入和登记...............................................14
2.2.3 建立专用信道.......................................................15
2.2.4 分组接入信道.......................................................15
2.2.5 CPCH状态指示信道...................................................17
2.2.6 接入导言指示信道...................................................17
2.2.7 碰撞检测/信道分配指示信道..........................................18
3.WCDMA软切换...............................................................19
3.1频率间切换.............................................................24
3.1.1压缩模式操作.......................................................24
3.1系统间切换.............................................................25

[ 本帖最后由 tomtuo 于 2010-12-22 13:46 编辑 ]