1Signal Processing with FFTs2/20/20082Opening Discussion■What did we talk about last class?■Do you have any questions about the readings?3Your Data■Do you have any data that we could look at and do analysis on either with fitting or signal processing?eix=cos x i sin x 4Fast Fourier Transform■Technically what Matlab uses is a function called a fast Fourier transform. To keep it fast, the number of elements passed into it needs to be a power of 2.■The fft function will go from a signal series and return a series of the frequencies.■The ifft function does the opposite.■Notice that we don't pass in the time values so the indexes are assumed to be the times. We have to scale that back to whatever range we actually want.5Examples■Let's spend the rest of the class working with the fft function and doing some examples.6Closing Comments■Assignment #4 is due on
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