| 摘要 |
PROBLEM TO BE SOLVED: To reduce inter-symbol interference, even if the delay wave of delay time exceeding guard interval length exists and to improve it to a degree similar to that, when a waveform is not equalized by the delay wave in a guard interval. SOLUTION: A transmission line characteristic estimation unit 5 and an SP extraction demodulation unit 6 estimate the transmission function of a multipath in a transmission line and an FIR filter circuit 9 becoming an equalizer is operated, so that it is canceled. Thus, a received signal is demodulated by a complex division circuit 12 and a signal demodulation circuit 13 in a reception demodulation unit 2, while the multipath is canceled.
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