非同步取样下信号周期的鲁棒算法

在提出了非同步取样数据同步化处理的设想之后，讨论了同步化中首先需要的信号周期求解方法，并根据周期信号非同步取样自相关函数的特点和可能存在的协波失真及噪声影响，提出了自相关和过零检测相结合的信号周期计算新方法。理论分析和仿真结果表明，新算法具有较强的鲁棒性，其抗噪声及抗协波失真性能明显高于现有周期算法，且计算简单，精度令人满意。

A robust algorithm of period calculation in asynchronous sampling

A synchronization processing scheme for the asynchronous sampled data is introduced. Based on some unique features of the autocorrelation function of asynchronous sampled period signal with harmonic and noise, a new period calculation algorithm is then presented from the autocorrelation in combination with across-zero detection technology , which is the key for the synchronization. Simulation results and theoretical analysis show that the new period calculation method in this paper is robust?computationally simple and its accuracy of estimation is satisfactory.