摘要
快速傅立叶变换是信号处理的常用方法,要进行快速傅立叶变换,则需要进行数据截断,即加窗函数处理,在窗内的采样值为函数值,窗外的值为零。窗函数本身的研究及应用是信号处理中的一个基本问题。本文详细讨论了对信号进行截断时,加不同的窗函数对频谱分析所产生的影响及改进的方法,给出了相应的matlab仿真结果。
FFT is common method used in signal processing. FFT can not use all of the data, so we need to use the window function to intercept the data, and the value in the window is the sample, the value out of the window is zero. The research of the window functions is a basis problem in signal processing. The influence on frequency analysis and the method to improve the effect is dis-cussed in detail, when the signal is intercepted by various window functions. The simulation result of detection method of frequency...
出处
《微计算机信息》
北大核心
2008年第10期272-273,共2页
Control & Automation
