Which of the following statements about DFT is wrong_ A、DFT is a useful tool for dealing with finite-length sequences. B、One period of DTFT is sampled in equivalent interval , and the N sampled points obtained are DFT. C、With DFT, the spectrum of the discrete-time signal can be repr...
Source: https://en.wikipedia.org/wiki/Fourier_analysis#/media/File:Fourier_transform,_Fourier_series,_DTFT,_DFT.svg. Time-Frequency Analysis This type of analysis explores how the frequency components of a time series change over time. Wavelet analysis is a popular method of time-frequency ...