小数时延的FIR系统和频域加权实现

Implementation of fractional time delay based on FIR system and frequency domain weighting

提出了基于线性移不变系统实现小数时延的方法并进行了性能分析。根据信号的时延与其频谱的对应关系,给出了基于线性相位加权实现时延的频域方法。通过定义总体平均误差参数,对其性能进行了比较。实验结果表明,这2种方法具有延时精度高,实现方便等优点。

The paper presents a new method based on linear shift invariable system to implement u,e fractional delay. Based on the relationship between signal＇s time domain and its frequency domain, we present the implementation of linear phase weighting method in frequency domain. In the end, the paper carried out the comparison of performance from the time delay error, system frequency response and whole average error. The experiment result indicates that these methods have the property of high precision in time delay and convenience to implement.