Reception method and receiver

A receiver comprising:

• a DFT (Discrete Fourier Transform) section that converts reception signals all at once into signals of a frequency domain, said reception signals being sent from a plurality of mobile stations communicating with the receiver by radio communication using a frequency division multiplex system;
• a demapping section that recognizes, from the signals of the frequency domain, user signals corresponding to respective mobile stations by using sub-carriers selected in association with the respective mobile stations, wherein each user signal recognized is separated from other user signals;
• a plurality of correction signal generation sections that generate respective correction signals for correcting respective frequency offsets of respective user signals;
• wherein each of the plurality of correction signal generation sections comprises,
• section that detects the respective frequency offsets of the respective user signals using time domain channel response;
• section that averages the respective frequency offsets with a predetermined time constant;
• section that calculates a complex sine wave based on the averaged respective frequency offsets;
• and
• section that generate said respective correction signals based on the complex sine wave;
• a plurality of first frequency conversion sections that correct the respective frequency offsets of the respective user signals in the frequency domain by the respective correction signals;
• and a plurality of demodulation sections that demodulate the respective corrected user signals;
• wherein the generating said respective correction signals, the correction of the respective frequency offsets and the demodulation are executed for said each user signal from which the other user signals are already separated.