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Consider a six-point decimation-in-time Fast Fourier Transform (FFT) algorithm for which...

This question belongs to Electronics And Communications Engineering Signal Processing
Signal Processing
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Consider a six-point decimation-in-time Fast Fourier Transform (FFT) algorithm, for which the signal-flow graph corresponding to X[I] is shown in the figure. Let $${W_6} = \exp \left( { - \frac{{j2\pi }}{6}} \right).$$    In the figure, what should be the values of the coefficients a1, a2, a3 in terms of W6 so that X[I] is obtained correctly?
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Correct Answer: Option D
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