摘要
在数字通信系统中,符号同步是正确接收发送信号的先决条件之一,对于单载波而言,需要正确地寻找到最佳的采样点,因为一点偏移都会造成星座图的发散。文中对数字滤波和平方的符号定时算法进行了研究,并以此算法为基础,结合F．M．Gardner提出的插值滤波器构成锁相环路,对环路的各个模块进行了详细描述,并给出了64QAM信号仿真的结果。
In digital communication system, timing synchronization is one of the preconditions for receiving the signals correctly. For single carrier, we need to find the best sampled points correctly, because a little offset will cause the dispersing of the constellation picture. In this paper, digital filtering and squaring algorithm is studied and analyzed. Basing on this timing error detection algorithm and combined with cubic interpolator introduced by F. M. Gardner, a phaselock loop can be constructed, which is discussed in detail. Finally, we present results of simulation of 64QAM signals
出处
《电子工程师》
2006年第3期43-46,共4页
Electronic Engineer
