Patent ID: 7933349

Claim:
An OFDM receiver comprising: OFDM-signal receiving means for receiving an orthogonal frequency division multiplexing signal; channel-characteristic estimating means for estimating a channel characteristic using pilot signals in an OFDM frequency domain signal obtained by subjecting an OFDM time domain signal received by the OFDM-signal receiving means to Fast Fourier Transform (FFT); time-direction-channel estimating means used for the estimation of a channel characteristic in the channel-characteristic estimating means; judging means for judging a result of the estimation of a time direction channel by the time-direction-channel estimating means; switching control means for switching presence or absence of the estimation of a time direction channel by the time-direction-channel estimating means in the channel-characteristic estimating means in accordance with a result of the judgment on the result of the estimation of a time direction channel by the judging means; and transmission-distortion compensating means for applying, on the basis of the channel characteristic estimated by the channel-characteristic estimating means, processing for compensating for transmission distortion to the OFDM frequency domain signal received by the OFDM-signal receiving means and subjected to the Fast Fourier Transform.