摘要
通过对正弦信号失真度计算公式的描述 ,提出了一种利用FFT来计算信号失真度的方法 ,并重点对DFT的定义、如何用DFT来计算模拟信号的傅立叶变换、FFT的有关原理 ,以及信号的倍频电路进行了论述 。
The formulation to compute the distortion factor of sine wave is described,and a method based on the FFT to test its distortion factor is put forward.The definition of DFT,the method how to compute Fourier Transform of analogue signal by DFT,the theories on FFT and the multiple-frequency circuit of square wave are especially discussed.The program of FFT algorithm is presented.
出处
《测控技术》
CSCD
2002年第4期28-30,共3页
Measurement & Control Technology
