Patent ID: 7852958

Claim:
A receiver for equalizing data signals included in an OFDM signal based on scattered pilot signals that are inserted in a predetermined sub carrier of the OFDM signal, the receiver comprising: a carrier extension unit operable to insert one or more pieces of data into an outside of a lower end of a band in a data group based on a value of a piece of data of the lower end, and insert one or more pieces of data into an outside of an upper end of the band based on a value of a piece of data of the upper end, the data group being composed of pieces of data indicating channel characteristics that are obtained based on the scattered pilot signals and included in a same symbol; an inverse Fourier transform unit operable to perform an inverse fast Fourier transform on a data group composed of 2 N pieces of data including the pieces of data inserted by the carrier extension unit, N being a positive integer; a noise removal unit operable to perform noise removal processing on a data group obtained as a result of the inverse fast Fourier transform by the inverse Fourier transform unit, by making smaller a value of a piece of data, in the obtained data group, that is no larger than a value determined by a predetermined procedure; a Fourier transform unit operable to perform a fast Fourier transform on a data group obtained as a result of the noise removal processing by the noise removal unit; and an equalization unit operable to equalize the data signals based on a data group obtained as a result of the fast Fourier transform by the Fourier transform unit.