Patent ID: 7174493

Claim:
A reception apparatus comprising: a reception section that receives a signal transmitted with an interleave pattern corresponding to a number of times of retransmission, the pattern being determined in advance between the reception apparatus and a transmitting side; a de-interleaver that performs de-interleaving on the signal received by said reception section using a plurality of interleave patterns corresponding to numbers of times of retransmission to form a plurality of de-interleaved signals; a correlation value calculation section that calculates a correlation value between each of the plurality of de-interleaved signals and a known reference signal; and a maximum value detection section that detects the maximum correlation value out of a plurality of correlation values calculated by said correlation value calculation section and determines the received signal's number of times of retransmission based on the interleave pattern which has formed the de-interleaved signal for which the maximum correlation value is obtained.