摘要
用插值函数拟合代替抽样函数求有限长连续信号和周期信号的频谱 ,推导出用离散信号傅里叶变换公式求拟合连续信号频谱的方法 ,该方法能用离散傅里叶变换的公式更准确地求出连续信号的频谱 .
The frequency spectrum of finite continuous signals and periodic signals is derived by interpolation function_fitting to replace sampling function, and a method for solving frequency spectrum of continuous signal by discrete Fourier transform(DFT) of discrete signal is derived. The method can accurately solve the frequency spectrum of continuous signal by fast Fourier transform(FFT). The method can improve the existing signal analyzers with FFT.
出处
《武汉水利电力大学学报》
EI
CSCD
2000年第6期61-63,71,共4页
Engineering Journal of Wuhan University
基金
国家自然科学基金资助! (编号 :5 99770 16 )
关键词
连续信号
傅里叶变换
频谱
函数拟合
continuous signal
discrete Fourier transform(DFT)
frequency spectr8
