DTFT Limited Cosine.
Cuthbert Nyack
The Z transform of M periods of a cosine with N samples per
period is given by the following expression.
The frequency spectrum associated with this transform is shown in the
applet below for different values of N and M. The spectrum is plotted
over the frequency range from 0 to the sampling frequency.
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© 2000 Cuthbert A. Nyack.