Teaching TN TRB EC Mock Test Signals and Systems Discrete Fourier Transform (DFT) and Discrete Fourier Series (DFS)
A continuous-time signal is sampled at a rate of 4096 samples/ sec. In the computation of a 4096 point DFT of the sampled signal, the number of frequency samples needed for the FFT algorithm to be more efficient than direct computation is:
1
1
2
6
3
8
4
16