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- Link between DFS, DFT, DTFT 1 answer
So, the first line is the definition given in my lecture. The second line was given in a tutorial on the difference between DTFT and DFT. The first, obvious difference is the limit of the sum. While the first goes from -infinity to +infinity, the second treats a finite signal. I think DTFT are applied to infinite signals. Now, ,the second difference appears in the exponential function. In the second line, we are using small omega (2*pi*f) multiplied with n, which should be the sample index. In the first line we are using 2*pi*f divided by fs. I think the signal's highest frequency component divided by fs gives the number of samples. So... no, I still don't see the link to n. Can somebody please help me understand this? Although this question appears a lot in this forum?