| 摘要 |
Coarse frequency offset estimation method and device in an orthogonal frequency division multiplexing (OFDM) receiver are provided. The coarse frequency offset estimation device includes a buffer for receiving demodulated symbol X(k) and cyclic shifting the symbol X(k) by a predetermined shift amount d and outputting shifted symbol X(k+d), a reference symbol generator for generating a reference symbol Z(k), a counter for counting the shift amount of d, a partial correlation for receiving the shifted symbol X(k+d) and the phase reference symbol Z(k) and calculating a partial correlation valuewith respect to K divided bands, wherein a range of shift amount d is between -N/2 and N/2, and a maximum detector for obtaining a shift amount of d by which the partial correlation value is maximum, and outputting the shift amount of d as an estimated coarse frequency offset value. Thus, stable coarse frequency offset estimation can be performed by a small number of calculations.
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