Patent ID: 7929628

Claim:
An OFDM receiver comprising: OFDM-signal receiving means for receiving an orthogonal frequency division multiplexing (OFDM) signal; channel-characteristic estimating means for estimating a channel characteristic using pilot signals in the OFDM signal received by the OFDM-signal receiving 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 signal received by the OFDM-signal receiving means, wherein the channel-characteristic estimating means includes: plural kinds of time-direction-channel estimating means used for the estimation of a channel characteristic; and switching control means for switching these estimating means according to a state of a channel, in which the switching control means includes maximum-Doppler-frequency judging means for calculating a maximum Doppler frequency from an estimated Doppler spectrum for the OFDM signal, and in which the switching control means controls the switching of the plural kinds of time-direction-channel estimating means according to the maximum Doppler frequency.