DFT中真实幅值电平的确定

Deciding the True Amplitude in DFT

从DFT的形式入手,通过对不同信号类型的公式推导,得出了数字化后的模拟信号应用DFT时,真实幅值电平与DFT频谱之间的关系。同时,推导了巴塞伐尔定理的数字形式。因此,在数字信号分析中,可以根据不同的模拟信号类型,来得到真实幅值电平。

The relation between the true amplitude and the DFT amplitude is derived from DFT with different kinds of signals,when applying DFT to digitalize analog signals. At the same time,the digital form of Pasiphae theorem is derived. So in the digital signal processing,the true amplitude can be get according to different kinds of analog signals.