Take the IFFT and FFT operations on digital symbols to modulate and demodulate the data bits.

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In the OFDM block diagram at the transmitter side, the next operation is an IDFT.


As we have learned earlier, an IDFT (or DFT) is implemented in an efficient manner through an IFFT (or FFT) algorithm. Therefore, a block of NN data symbols is an input in an IFFT block that generates the corresponding time-domain signal.

The following code helps us understand this concept:

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