Transmitting method, receiving method, receiving apparatus and transmitting apparatus

摘要

A transmitter apparatus wherein a simple structure is used to successfully suppress the degradation of error rate performance that otherwise would be caused by fading or the like. There are included encoding parts (11—1-11—4) that encode transport data; a mapping part (3304) that performs such a mapping that encoded data sequentially formed by the encoding parts (11—1-11—4) are not successively included in the same symbol, thereby forming data symbols; and a symbol interleaver (3301) that interleaves the data symbols. In this way, a low computational complexity can be used to perform an interleaving process equivalent to a bit interleaving process to effectively improve the reception quality at a receiving end.

主权项

1. A transmitting method comprising:
generating a plurality of encoded data sequences configured by a predetermined number of bits, by encoding transmit data configured by a plurality of bits; generating one symbol sequence by one modulating process selected from a plurality of modulating processes on the encoded data sequences; outputting one baseband signal sequence corresponding to the one symbol sequence; and transmitting one transmit signal sequence based on the one baseband signal sequence, wherein: the one modulating process uses one of QPSK or 16QAM; when the symbol is generated by using QPSK, the one symbol sequence is configured by first two encoded data sequences in the plurality of encoded data sequences; when the symbol is generated by using 16QAM, the one symbol sequence is configured by the first two encoded data sequences and second two encoded data sequences in the plurality of encoded data sequences; a number of the symbols generated by using the 16QAM is the same as a number of the symbols generated by using the QPSK; whichever of QPSK or the 16QAM is used, specific two bits extracted from a plurality of bits configuring the symbol are bits belonging to the first two encoded data sequences; the number of encoded data sequences corresponds to the multi-level of the one modulating process; at least one bit in the two specific bits is most significant bit of the 16QAM; each encoded data sequence is LDPC encoded data; and the one baseband signal sequence is generated by using OFDM method.