Question

determine and draw the signal flow graph for the N = 16 point, radix-4 decimation-in-time FFT...

determine and draw the signal flow graph for the N = 16 point, radix-4 decimation-in-time FFT algorithm. Using this flow graph, determine the DFT of the
sequence

x(n) = cos (πn/2) , 0 ≤ n ≤ 15

Here is the signal flow graph for the N=16 point ,radix -4 decimation-in-time fft algorithm

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