接收机位定时恢复的设计

数字通信系统中,位定时同步是正确收发信号的先决条件之一,对于单载波而言,需要正确的寻找到最佳采样点,因为一点偏移都会造成星座图的发散。文中研究了接收机定时恢复环路的设计,该环路包括平方定时误差检测,环路滤波,定时控制和内插滤波器单元组成,通过Matlab仿真表明,该环路能够很好的实现定时恢复。

Design of the receiver's bit timing recovery

In the digital communication,bit timing recovery is one of the important figures to receive the signal correctly.For the single carrier,it is needed to find the optimal sampling,because a little offset may make the constellation to scatter.In the paper,the design of the receiver's timing recovery loop is studied, which includes squaring timing error detection,loop filter,timing controller and interpolation filter.The result of the Matlab simulation indicates that this loop can realize the timing recovery well.