摘要
针对非同步采样情况下快速傅立叶算法进行谐波分析时所出现的频谱泄漏问题,本文分析了产生频谱泄漏的原因,提出一种应用插值函数的同步化算法,其目的是修正初次采样序列得到近似理想的同步采样点,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,具有良好性能、计算量小、适合于实时测量应用的特点。
The latest progress and the research direction on reducing spectrum leakage of periodic signal measurement are simply introduced, the reason of spectrum leakage is analyzed, and a synchronization algorithm based asynchronous sampled data set on periodic signal is proposed. By the computer simulation and the synchronization algorithm calculation, the result of DFT analysis show that the new algorithm is capable for reducing the leakage.
出处
《电测与仪表》
北大核心
2005年第11期12-14,8,共4页
Electrical Measurement & Instrumentation
关键词
频谱泄漏
非同步采样
DFT分析
spectrum leakage
asynchronous sampling
DFT analysis