Patent ID: 7991091

Claim:
A receiver to receive a multi-carrier transmission signal whose guard interval period comprises a null signal, said receiver comprising: waveform shaping means for using a delayed-wave signal component overflowing from the end of an effective symbol of the received signal into the guard interval following the effective symbol of the received signal to perform waveform shaping for a signal component at the head of the effective symbol; signal processing means for demodulating the received signal following waveform shaping; correlating means for finding correlation by using a known pattern included in the received signal; power calculating means for calculating power of the received signal; normalizing means for normalizing the result of correlation based on the calculated power; timing means for comparing the normalized result of correlation with a prescribed threshold and timing the maximum delay time based on the comparison; and delayed-wave component specifying means for specifying, based on the maximum delay time, the delayed-wave portion overflowing from the end of the received symbol into the guard interval.