Patent ID: 7991089

Claim:
An inter-carrier interference removal device that removes an inter-carrier interference component from a multi-carrier signal, the multi-carrier signal including a plurality of carrier signals each indicating a frequency response characteristic varying with a channel status, the inter-carrier interference removal device comprising: an acquisition unit operable to acquire the multi-carrier signal including the plurality of carrier signals; a reliability value calculation unit operable to calculate a reliability value of each respective non-equalized carrier signal of the plurality of carrier signals, the reliability value of each respective non-equalized carrier signal being calculated based on a real value related to an amplitude of the frequency response characteristic of the respective non-equalized carrier signal; an equalization unit operable to equalize each respective carrier signal of the plurality of carrier signals; a weighting unit operable to weight each respective equalized carrier signal using the reliability value calculated for each respective non-equalized carrier signal; and an inter-carrier interference removal unit operable to (i) calculate, for each respective carrier signal of the plurality of carrier signals, an inter-carrier interference component based on a variation of the frequency response characteristic of each respective non-equalized carrier signal, based on the respective weighted carrier signal, and based on the respective equalized carrier signal, and (ii) remove the calculated inter-carrier interference component from each respective the non-equalized carrier signal.