摘要
根据离散傅里叶变换DFT的定义,推导出一种用DFT计算连续周期信号幅值谱的方法,通过MATLAB仿真验证了该方法的有效性,解释了DFT中存在的频谱泄漏及栅栏效应对该方法的影响,并提出了相应的改进方法.
According to the definition of DFT,a calculation method of amplitude spectrum for periodic signal is derived in this paper.Through simulation of amplitude spectrum calculation in MATLAB,the efficiency of the method is validated to satisfy the need for project.In the end,the problems of spectrum leakage and picket fence effect are explained and the corresponding solution is proposed.
出处
《湖北文理学院学报》
2008年第11期42-44,共3页
Journal of Hubei University of Arts and Science
关键词
DFT
幅值谱
频谱泄漏
DFT
Amplitude spectrum
Spectrum leakage
