Patent ID: 7519122

Claim:
An OFDM reception apparatus for receiving and demodulating an OFDM (Orthogonal Frequency Division Multiplexing) signal which transmits a pilot signal whose amplitude and phase are known, the apparatus comprising: a channel estimation section for calculating a channel response before interpolation by performing computation between a frequency-domain OFDM signal obtained by Fourier-transforming the received OFDM signal and the pilot signal, performing interpolation with respect to the before-interpolation channel response using a plurality of filters having different characteristics from each other, and outputting a plurality of interpolated channel responses based on respective results of the interpolation obtained by the plurality of filters; an equalization section for performing waveform equalization with respect to the frequency-domain OFDM signal based on the plurality of interpolated channel responses, and outputting a plurality of demodulated signals based on respective results of the waveform equalization corresponding to the plurality of interpolated channel responses; a determination section for determining one having best quality from the plurality of demodulated signals, and outputting a result of the determination; and a selection section for selecting and outputting one of the plurality of demodulated signals in accordance with the determination result.