Patent ID: 7864836

Claim:
An orthogonal frequency division multiplexing (OFDM) equalizer comprising: a memory configured to store OFDM frame information relative to an OFDM frame including a plurality of data cells and a plurality of pilot cells of a fast Fourier transformed OFDM reception signal; a partial sum calculator configured to calculate a partial sum of a data cell of the plurality of data cells based on a current pilot cell among the plurality of pilot cells and a fixing coefficient corresponding to the current pilot cell; an adapting coefficient calculator configured to calculate a channel response of the data cell and adaptively calculate an adapting coefficient based on the calculated channel response and an interpolated channel response; an interpolated channel response calculator configured to calculate the interpolated channel response based on the partial sum output from the partial sum calculator and the adapting coefficient; and a channel compensation unit configured to output a corrected OFDM reception signal based on the fast Fourier transformed OFDM reception signal and the interpolated channel response.