Question: The butterfly in Figure was taken from a decimation-in-time FFT with N = 16. Assume that the four stages of the signal flow graph are
The butterfly in Figure was taken from a decimation-in-time FFT with N = 16. Assume that the four stages of the signal flow graph are indexed by m = 1,?., 4. What are the possible values of r for each of the four stages?

Wis 16
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