【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 .该方法可以非常方便地改进现有信号分析仪性能价格比更多还原

【Abstract】 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.更多还原