针对定时同步(Q&M)算法突发通信中的定时误差跟踪精度在存在定时频偏时会下降的问题,文中在该算法基础上增加滑窗处理环节,有效降低同步采样点数,提升了定时误差跟踪精度。仿真结果表明,在存在定时频偏时的情况下,改进算法的定时跟踪均方误差显著降低,且适用于二进制相移键控(BPSK)、正交相移键控(QPSK)、正交幅度调制(QAM)等调制方式,能够满足无线突发通信的应用需求。

Considering the problem that synchronization accuracy will decrease when timing frequency is offset, this paper proposed an improving method which a sliding window processing is added on the basis of this algorithm, can effectively reduce the number of synchronous sampling points, and improves timing error tracking accuracy. The simulation results show that the improved algorithm can reduce the mean square error of timing tracking significantly in the case of timing frequency offset, and is suitable for BPSK, QPSK, QAM and other modulation modes, which can meet the application requirements of wireless burst communication.

TN957