| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital broadcast receiver for quickly controlling an FFT window to be located at a proper position so as to enhance the quality of a received signal even when receiving a delay wave including a pre-ghost signal in the case of receiving digital broadcast employing the OFDM modulation system. SOLUTION: The digital broadcast receiver includes: an FFT 39 for segmenting a valid symbol period from a transmission symbol of an OFDM signal and applying Fourier transform to the result; a guard correlation section 51 for obtaining a correlation between the OFDM signal and its delay signal to output a result of guard correlation; delay profile arithmetic sections (53, 55) for applying an inverse FFT arithmetic operation to a pilot signal of the OFDM signal to obtain a delay profile; and a timing signal generating section 70 for mixing a signal corresponding to the guard correlation result with a signal corresponding to the delay profile and generating a timing signal to control an arithmetic range on the basis of a resulting signal of mixing. COPYRIGHT: (C)2004,JPO
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