| 摘要 |
PROBLEM TO BE SOLVED: To provide an OFDM receiver, in which the performance of frequency synchronization and phase fluctuation elimination of a received signal can be enhanced even when a disturbing wave exists. SOLUTION: The OFDM receiver includes a demodulation circuit 14 that converts an OFDM signal comprising an effective period and a guard period into a demodulation signal on a frequency axis, a delay circuit 19 that delays the demodulation signal for the effective period, a correlation detection circuit 18 that obtains the correlation between a demodulation signal before delay and a demodulation signal after delay to output a correlation signal, a deviation detection circuit 21 that detects a deviation of the correlation signal from a reference value for other periods than the guard period, a correction circuit 22 that corrects the correlation signal for the guard period by using the deviation, an error detection circuit 23 that uses the corrected correlation signal to detect a frequency error of the demodulation signal, and a control circuit 24 that smoothes the signal denoting the frequency error and feeding back the result to the demodulation circuit 14 to control the detection in the demodulation circuit 14.
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