OFDM DEMODULATOR, OFDM DEMODULATION METHOD, OFDM DEMODULATION PROGRAM, AND COMPUTER READABLE RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an OFDM demodulator for precisely correcting a frequency error without enlarging a circuit scale. SOLUTION: The OFDM demodulator 1 receives digital broadcast wave and samples it on the basis of a clock signal of a frequency oscillator different from that of a broadcast station. A delay profile peak position detection part 15 detects a peak position of differential output of complex correlation strength. A clock frequency error detection part 16 detects a frequency error on the basis of a difference between a peak position in the (n-1)th cycle and a peak position in the n-th cycle. A PLL 19 changes an operation clock on the basis of a frequency error from the clock frequency error detection part 16 and corrects the frequency error. COPYRIGHT: (C)2010,JPO&INPIT