Multi h CPM信号无数据辅助的反馈定时同步算法

针对Multi h CPM信号前馈定时同步不适用于连续传输模式通信系统问题，文中提出了一种无数据辅助的反馈定时同步算法。该算法基于最大似然准则推导出定时误差检测信号，利用误差检测信号形成闭环控制结构对接收信号进行跟踪定时，并与修正的克拉美 罗界进行比较。仿真结果表明，该算法能跟踪定时偏移，且具有较好的跟踪性能，适合连续模式传输的通信系统。

Non data aided Feedback Timing Synchronization Algorithmfor Multi h CPM Signals

Since the feedforward timing synchronization for Multi h CPM is not suitable for communication systems of continuous transmission mode, the paper proposes a non data aided feedback timing synchronization algorithm. This algorithm adopts the maximum likelihood principle to derive the timing error detection signal, which is then used to form a closed loop control structure to track the timing offset. And the modified Cramer Rao Bound is presented for comparison. Simulation results show that the proposed algorithm can track timing offset and has good performance, suitable for communication systems of continuous mode transmission.