Data processing method, precoding method, and communication device

A reception method comprising:

• receiving a signal including a first Orthogonal Frequency Division Multiplexing (OFDM) symbol and a second OFDM symbol;
• extracting a first modulation symbol sequence and a second modulation symbol sequence from the first OFDM symbol and the second OFDM symbol, respectively;
• demodulating the first modulation symbol sequence mapped on 64 signal points defined by a first 64 Quadrature Amplitude Modulation (QAM) scheme to generate a first encoded data sequence;
• demodulating the second modulation symbol sequence mapped on 64 signal points defined by a second 64 QAM scheme to generate a second encoded data sequence;
• decoding the first encoded data sequence according to a first coding rate and a first code length to generate first information;
• and
• decoding the second encoded data sequence according to the first coding rate and a second code length to generate second information, the second code length being different from the first code length, wherein
• the 64 signal points are representable on an UQ plane having a real axis and an imaginary axis such that a distance between adjacent signal points has nonuniformity,
• the 64 signal points defined by the first QAM scheme have a first arrangement pattern on the UQ plane, and
• the 64 signal points defined by the second QAM scheme have a second arrangement pattern on the UQ plane different from the first arrangement pattern.

A reception device comprising:

• receiving circuitry configured to receive a signal including a first Orthogonal Frequency Division Multiplexing (OFDM) symbol and a second OFDM symbol;
• OFDM symbol processing circuitry configured to extract a first modulation symbol sequence and a second modulation symbol sequence from the first OFDM symbol and the second OFDM symbol, respectively;
• demapping circuitry configured to demodulate the first modulation symbol sequence mapped on 64 signal points defined by a first 64 Quadrature Amplitude Modulation (QAM) scheme to generate a first encoded data sequence, the demapping circuitry being configured to demodulate the second modulation symbol sequence mapped on 64 signal points defined by a second 64 QAM scheme to generate a second encoded data sequence;
• and
• decoding circuitry configured to decode the first encoded data sequence according to a first coding rate and a first code length to generate first information, the decoding circuitry being configured to decode the second encoded data sequence according to the first coding rate and a second code length to generate second information, the second code length being different from the first code length, wherein
• the 64 signal points are representable on an UQ plane having a real axis and an imaginary axis such that a distance between adjacent signal points has nonuniformity,
• the 64 signal points defined by the first QAM scheme have a first arrangement pattern on the UQ plane, and
• the 64 signal points defined by the second QAM scheme have a second arrangement pattern on the UQ plane different from the first arrangement pattern.