周期图法功率谱估计中的窗函数分析

The Window Function Analysis of Amended Periodic Table in Power Spectrum Estimation

在经典谱估计中 ,由 Welch提出的修正周期图法 ,由于其简单 ,易于理解 ,便于计算等优点 ,被广泛应用。本文运用 Matlab工具 ,对修正周期图法功率谱估计进行了仿真与性能分析 ,并重点分析了窗函数对谱估计的影响 ,指出了他的优缺点。

Being simple, easy to understand and convenient for calculation, the amended periodic table presented by Welch is widely used in the field of classical chart. Using Matlab, this paper simulates and analyzes this method, primarily analyzes the influence of window function. Points out its virtue and defect.