Lecture 15 Blog, ECE438 Fall 2010, Prof. Boutin
Monday September 28, 2010.
In Lecture #15, we obtained a "practical" formula for reconstructing the DTFT of a finite duration signal from the DFT of its periodic repetition. The formula was observed to hold whenever the periodic repetition has a period that is at least as long as the signal duration. We finished the lecture by introducing a matrix equation to represent the transformation from a finite duration signal to the DFT.
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