Data processing method, precoding method, and communication device

A bit sequence decoding scheme comprising:

• a demapping step of outputting a first data sequence corresponding to a bit sequence having a bit length that is a multiple of X+Y, the first data sequence being based on a data sequence corresponding to a bit sequence having X+Y bits generated from a first complex signal s1 and a second complex signal s2, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2;
• a deinterleaving step of deinterleaving a second data sequence corresponding to a bit sequence having N bits with use of a memory, and outputting the deinterleaved second data sequence, the memory having memory regions equal in number to a divisor of the N bits and whose addresses are consecutive, and storing each of pieces of data corresponding one-to-one to bits of the bit sequence having the N bits in a different one of the memory regions;
• an error-correction decoding step of performing error correction decoding on the deinterleaved second data sequence to generate a K-bit information bit sequence, and outputting the K-bit information bit sequence;
• and
• before the deinterleaving step, a bit length adjustment step of removing a data sequence corresponding to an adjustment bit sequence from the first data sequence to generate the second data sequence, and outputting the second data sequence.

A bit sequence decoding scheme comprising:

• a demapping step of outputting a first data sequence corresponding to a bit sequence having a bit length that is a multiple of X+Y, the first data sequence being based on a data sequence corresponding to a bit sequence having X+Y bits generated from a first complex signal s1 and a second complex signal s2, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2;
• a bit length adjustment step of extracting a predetermined data sequence from the first data sequence, performing statistical processing on the extracted predetermined data sequence to generate a second data sequence corresponding to a bit sequence having N bits, and outputting the second data sequence;
• and
• an error-correction decoding step of performing error correction decoding on the second data sequence after the statistical processing to generate a K-bit information bit sequence, and outputting the K-bit information bit sequence.