Patent ID: 7313180

Claim:
A receiving device comprising: a receiving unit which receives a signal arriving through a transmission path, as a reception signal; a delay unit which outputs a delay signal which is obtained by delaying the reception signal by a predetermined delay time; an estimation unit which estimates a transmission path characteristic; an equalizer/demodulator which compensates for the delay signal with the estimated transmission path characteristic, demodulates a compensation result, and outputs a demodulation result as a transmission signal; a replica unit which compensates for the reception signal with the previously estimated transmission path characteristic, demodulates a compensation result, modulates a demodulation result, and outputs a modulation result as a replica signal; and an estimation unit which estimates a transmission path characteristic by comparing the reception signal with the replica signal; wherein the predetermined delay time is longer than a symbol time length of the reception signal and is equal to a time required for processes by said replica unit and said estimation unit, in order for said equalizer/demodulator to compensate for each symbol of the reception signal with the transmission path characteristic which is estimated, by said estimation unit, for the symbol to be compensated for by said equalizer/demodulator.