| 摘要 |
Lowering of the frequency use efficiency and throughput is prevented while the blanking advantage is provided at the retransmission time in MCW using a plurality of streams per codeword. In a wireless communication apparatus for using a plurality of streams per codeword and performing data transmission according to a plurality of codewords, when two codewords are transmitted using four streams, for example, from a base station 101 to a user terminal 102, if retransmission occurs in the codeword, the codewords and the streams are arranged so as to decrease the number of streams with the number of codewords intact so that retransmission codeword is transmitted in two streams and new codeword is transmitted in one stream.
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