Electronics Engineering · Signals and Systems
In a radix-2 decimation-in-time (DIT) FFT with N = 32, assume that the five stages of the signal flow graph are indexed by m = 1, 2, 3, 4, 5, where 5 is the last stage. If a butterfly structure utilizes the twiddle factor W326, which of the five stages can contain butterflies of this form?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1m = 2, 4, 5
- 2m = 3, 4, 5
- 3m = 4, 5✓
- 4m = 3, 4
Correct answer
m = 4, 5
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