RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION SYSTEM, AND RADIO COMMUNICATION METHOD

摘要

Even if a CCFI error is caused, it is possible to prevent a packet error upon initial reception caused by an erroneous storage of data into a buffer and perform synthesis in a shifted state upon retransmission. In a transmission circular buffer, code data to be transmitted is read out successively in reverse direction from the tail to the head such as D_12, D_11, ..., D_1 and subjected to modulation by a modulation unit. After this, a multiplexing unit successively arranges modulated data symbols D_12 to D_1 starting with the third OFDM symbol #3 after the control channel CCH according to a CCFI value (=2). At the reception side, the received data symbol is demodulated and then rearranged in the reverse direction from the tail to the head of the demodulated information from a predetermined data start point so as to be stored in a reception circular buffer. This eliminates a data storage shift in the reception circular buffer or the erroneous reception by the head data missing.