文件名称：同步信道(F-SynCH)-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:52:03
cdma
同步信道(F-SynCH) 同步信道的作用 手机通过同步信道获得与系统的同步 同步信道提供 导频偏置PILOT_PN 系统时间SYS_TIME 长码状态LC_STATE 寻呼信道速率P_RAT 同步信道速率固定为1200bps To QPSK coder 2.4kbps 4.8kbps 4.8kbps 符号 重复的符号 1.2kbps 卷积 r=1/2,K=9 符号重复 块交织 同步信道比特 W3264 CDMA 空中接口 调制符号 As stated previously, a long code is used for scrambling. However, a long code has too long a period, which cannot be wholly used for scrambling. We can only sample some chips of a long code at some point of time and use them as the sequences of scrambling. This requires that a mobile station should know the following information: when the long code chip used for scrambling begins, what the mask of a generated long code is, etc. All these pieces of information are so-called long code synchronization.