Patent ID: 8737544

Claim:
A method of estimating a frequency offset in a wireless communication system, the method comprising: performing envelope equalized processing (EEP) for a reception signal; calculating partial periodograms for a plurality of test values based on the reception signal which goes through the EEP; estimating a first frequency offset based on two partial periodograms adjacent to each other among the partial periodograms for the plurality of test values; estimating a second frequency offset based on the estimated first frequency offset and two partial periodograms adjacent to each other based on the estimated first frequency offset; repeatedly estimating a third frequency offset based on the estimated first frequency offset, the estimated second frequency offset, and two partial periodograms adjacent to each other based on the estimated first frequency offset and the estimated second frequency offset; and estimating a final frequency offset by adding the estimated first frequency offset, the estimated second frequency offset, and the estimated third frequency offset.