OFDM DEMODULATION DEVICE, OFDM DEMODULATION METHOD, OFDM DEMODULATION PROGRAM, AND RECORDING MEDIUM

摘要

When there exist a plurality of spurious disturbing waves having an intense peak at a particular frequency in a transmission band, the correlation of the disturbing waves are not constant and it becomes difficult to remove the correlation of the disturbing waves. Provided is an OFDM demodulation device which includes: a symbol integration circuit (131) which integrates a guard correlation signal in the symbol number direction; and an offset removal circuit (132) which removes an offset from the guard correlation signal which has been integrated in the symbol number direction. An oscillation component attributed to the disturbing waves contained in the guard correlation signal is cancelled by the integration in the symbol number direction. Accordingly, it is possible to surely remove the offset from the guard correlation signal. For this, a maximum value detection circuit (124) can obtain an accurate symbol timing. Moreover, a phase calculation circuit (125) can accurately calculate a phase rotation amount.