... resulting in the output spectrum, that is,. The DFT and the Inverse DFT relate the signals in the two domain.X[f] ì H[f] ' Y[f] DFT IDFTIDFT DFT IDFT DFT . In the frequency domain, the input ... ispresent. In other words, the length of the signal limits the frequencyresolution. This is distinct from the first factor, because the length of the input signal does not have to be the same as the length ... the signal.These N points must contain all the nonzero points identified by the window,but may also include any number of the zeros. This has the effect 169CHAPTER9 Applications of the DFT The...