basic ofdm with interlever:

The

transmitter section converts digital data to be transmitted, into a mapping of

subcarrier amplitude and phase. It then transforms this spectral representation of

the data into the time domain using an Inverse Discrete Fourier Transform

(IDFT).

The Inverse Fast Fourier Transform (IFFT) performs the same operations as an

IDFT, except that it is much more computational efficiency, and there is used in

all practical systems. In order to transmit the OFDM signal the calculated time

domain signal is then mixed up to the required frequency.