存在定时误差的MPSK信号调制方式识别

Automatic modulation classification of MPSK signals With timing error

接收机存在定时误差时,应用高阶累积量进行MPSK信号调制方式识别会引起识别率下降。本文针对这一问题,提出了一种对接收数据进行盲定时估计并通过插值滤波进行定时恢复的算法。仿真结果表明,对插值滤波后的数据进行调制识别,具有良好的分类性能,对定时误差有很强的适应能力。

A new algorithm for MPSK modulation classification based on cumulants is proposed, which is used when timing error exists. A blind timing error estimation and interpolation are performed before modulation classification. Simulation result shows that the algorithm has a good performance and is robust to timing error.