摘要
本文针对非同步采样情况下离散傅立叶算法进行谐波分析时所出现的频谱泄漏问题,分析了其产生的原因,并提出了一种应用插值函数的同步化算法,用于修正初次采样序列,从而得到近似理想同步采样点,以减小DFT分析产生的频谱泄漏。仿真结果表明该算法使频谱泄漏大大小于未同步化方法,减小由泄漏带来的测量结果误差,且算法计算量小,具有一定的应用价值。
The latest progress and the research direction on reducing spectrum leakage of periodic signal measurement are simply introduced firstly, the reason of spectrum leakage is analyzed in detail, and a synchronization algorithm based asynchronous sampled data set on periodic signal is proposed. By computer simulation based on the synchronization algorithm calculation, the results of DFT analysis show that the new algorithm is capable of reducing the leakage effectually.
出处
《系统仿真技术》
2005年第3期147-152,共6页
System Simulation Technology
基金
上海市科委集成电路设计专项项目(047062016)资助
关键词
频谱泄漏
非同步采样
DFT分析
spectrum leakage
asynchronous sampling
DFT analysis
