Patent ID: 8428190

Claim:
A radio receiving apparatus that receives a multicarrier signal, comprising: a Fourier transform unit that calculates in-phase channels and quadrature-phase channels of carrier waves from a reception signal obtained by receiving the multicarrier signal; a transmission-channel estimating unit that calculates transmission channel characteristics of the carrier waves from a known signal section of the reception signal; a transmission-channel equalizing unit that receives an output of the Fourier transform unit as an input and performs processing for compensating for an amplitude change and a phase rotation in the output of the Fourier transform unit caused by a transmission channel; a region determining unit that determines a region on a complex plane in which output data after transmission channel equalization is present; a power calculating unit that receives the in-phase channels and the quadrature-phase channels after the transmission channel equalization as an input and calculates a power component of the reception signal; and a transmission-channel-fluctuation correcting unit that corrects an estimation value of a phase rotation angle output to the transmission-channel equalizing unit by the transmission-channel estimating unit based on a determination result of the region determining unit, and corrects an estimation value of an amplitude fluctuation output to the transmission-channel equalization unit by the transmission-channel estimating unit based on a calculation result of the power calculating unit.