WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION METHOD

摘要

Disclosed is a wireless communication device capable of always obtaining the optimum error rate characteristic and of keeping the number of retransmissions to a minimum for IR-based HARQ which uses LDPC encoding in the error correction encoding. With the device, an RV control unit (102) controls the system check bit transmission sequence such that all of the system check bits included in an LDPC code word are transmitted with the first transmission in sequence from the smallest column weight of a check matrix, and controls the transmission sequence of multiple RVs such that multiple RVs comprising only system check bits are transmitted in sequence from the smallest column weight when an RV is transmitted additionally after all of the parity bits included in an LDPC code word have been transmitted. In addition, a modulation unit (103) maps a symbol, composed of system check bits belonging to each of the multiple RVs and the transmission sequences of which are controlled by the RV control unit (102), to a signal point which differs from the signal point to which was mapped a symbol composed of the system check bits transmitted with the first transmission.