HW7 Discussion, ECE438, Fall 2010

• I presume the N= 1000 cases are to warrant the "short method" of doing the DFT. correct?

Correct indeed. -pm

• Can't I use the short method for every part? And what exactly do you want for the thought question at the bottom? ak's are going to be the same as the DFT right?

Warning: the short method does not always work. You need to be able to quickly determine whether it will work just from looking at the signal. Now, the ak's are not quite the same as X[k]'s. You need to find out what the difference is. -pm

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