| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a demodulator capable of performing processing according to drift speed. Ž<P>SOLUTION: The demodulator has: an inverse Fourier transform part (602) which generates an impulse response by performing inverse Fourier transform of a pilot signal to which Fourier transform is performed by a Fourier transform part; a maximum position detection part (604) which detects a position to be the maximum in the generated impulse response; a phase difference correction part (606) which corrects phase difference between impulse responses of the present symbol and a symbol before that to be generated from difference of frequency arrangement of the pilot signal between the present symbol and the symbol before that on the basis ofthe impulse response of the detected position to be the maximum; a phase deviation calculation part (607) which calculates a phase rotation amount between the corrected impulse responses of the present symbol and the symbol before that; a doppler frequency calculation part (608) which calculates a doppler frequency on the basis ofthe calculated phase rotation amount. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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