一种多进制CPM信号的开环位同步算法

An Open-Loop Timing Recovery Algorithm for M-Array CPM Signals

针对位同步问题,提出了一种基于基函数分解的开环位定时估计算法。该算法首先利用基函数分解的结果进行相关运算,将本地参考信号波形和接收信号波形的定时偏差缩小到T/4以内;再根据相关运算提供的角度信息进行精确的位同步估计。该算法不需要提取载波相位信息,复杂度较低。仿真结果表明该算法具有较好的估计精度。

An open-loop timing recovery algorithm based on basis-function decomposition approach is presented in this paper. The algorithm reduces the bias between the received signal and reference signal to half of the symbol period by the correlative computation, then makes exact timing-bias estimate by the angle information extracted from the correlative computation. The algorithm need not extract carrier phase and the complexity is low. Simulation results show it has good estimation precision.