A system and method for performing stepped automatic gain control (AGC)
for orthogonal-frequency-division-multiplexing (OFDM) applications
comprises a radio frequency (RF) tuner and an OFDM demodulator
operatively connected to the RF tuner, the OFDM demodulator comprising
logic circuitry adapted to (i) detect OFDM symbols from a stream of data;
(ii) detect boundaries of the OFDM symbols; (iii) detect a cyclic prefix
duration of data values associated with the OFDM symbols; and (iv)
provide a feedback to the RF tuner of the information pertaining to the
boundaries of the OFDM symbols and the cyclic prefix duration.