Physics · Signal Processing
Consider an 8-point DFT implemented via radix-2 decimation-in-frequency FFT. The complete signal-flow graph has 3 stages. If you count the number of butterfly computations (each butterfly = 1 complex multiplication + 2 complex additions), how many complex multiplications does the full flow require?
- 16
- 216
- 312✓
- 48
Correct answer
12
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