Patent ID: 8355454

Claim:
A reception device for receiving an OFDM signal, the reception device comprising: a variable gain amplifier operable to amplify the OFDM signal based on an amplification gain varied discretely in accordance with an AGC control signal; a level detection section operable to detect a level of the amplified OFDM signal and to generate the AGC control signal in order to maintain the detected level at a constant; an FFT section operable to perform a fast Fourier transform in a portion of the amplified OFDM signal; a timing control section operable to control a timing of varying the amplification gain so that the amplification gain varies in other portions of the OFDM signal on which no fast Fourier transform is performed; and an equalization section operable to detect distortions of a plurality of reference subcarriers regularly included in the OFDM signal, to estimate distortions of data subcarriers by performing an interpolation using the detected distortions, and to equalize the OFDM signal using the estimated distortions, wherein the equalization section corrects an estimated error of the estimated distortions of the data subcarriers in accordance with a discrete variation of the amplification gain notified by the AGC control signal.