DS-CDMA系统中PN码定时跟踪新算法及其实现

Design and Implementation of Timing Tracking in DS-CDMA

定时跟踪是DS CDMA系统中Rake接收的关键技术 ,性能的好坏直接影响着扩频系统能否正常接收。文中首先对扩频系统中定时跟踪原理做出分析 ,然后重点介绍了PN码的“基于能量窗重心的定时跟踪”新算法 ,并选择了这个算法来实现CDMA2 0 0 0 - 1x上行链路的PN码定时跟踪。最后 ,经过在典型城市环境下的现场实测 ,误帧率达到CDMA2 0 0 0 -

Timing tracking is the key technology of the rake receiver in DS CDMA system Its performance has an important effect on DS spread spectrum system The principle of timing tracking of PN code in DS spread spectrum system is discussed in this paper The timing tracking architecture based on the barycentre of energy window is analysed here And this architecture is selected to implement the timing track of PN code of reverse channel in CDMA2000-1x