Patent ID: 7643587

Claim:
A frequency offset correcting apparatus, comprising: a correcting unit which respectively corrects frequency offsets contained in a plurality of received signals that correspond respectively to a plurality antennas; a processing unit which applies an adaptive algorithm to the plurality of corrected received signals so as to derive a plurality of weighting factors corresponding respectively to the plurality of corrected received signals and an error derived by the adaptive algorithm; and an estimating unit which estimates respectively residual components of the frequency offsets contained in the plurality of corrected received signals, based on the plurality of derived weighting factors and the error derived by the adaptive algorithm, wherein said estimating unit estimates the residual components of frequency offsets by multiplying respectively the error derived by the adaptive algorithm by complex conjugation of the plurality of corrected received signals and by extracting imaginary components from a division result where the multiplication result is divided by the plurality of derived weighting factors, and wherein said correcting unit corrects the frequency offsets respectively by reflecting the estimated residual components of frequency offsets.