Side information transmission method based on partial transmit sequence technology, and apparatus

A wireless communications apparatus, comprising:

• a receiver configured to obtain to-be-transmitted data, wherein the to-be-transmitted data comprises at least a first data sub-block carried on a first subcarrier and a second data sub-block carried on a second subcarrier;
• a modulator configured to obtain a first modulated signal and a second modulated signal based on a first phase rotation factor and a second phase rotation factor, wherein the first phase rotation factor is in a first phase rotation factor set and the second phase rotation factor is in a second phase rotation factor set;
• a side information generator configured to generate side information based on the first phase rotation factor and the second phase rotation factor;
• a side information modulator configured to obtain a side information modulated signal based on mapping the side information to the first subcarrier;
• and
• a combiner configured to generate a to-be-transmitted signal by superposing the side information modulated signal, the first modulated signal, and the second modulated signal.

A wireless communications apparatus, comprising:

• a memory configured to store program instructions;
• and
• a processor coupled to the memory and configured to execute the program instructions to the wireless communications apparatus to:
• obtain to-be-transmitted data, wherein the to-be-transmitted data comprises at least a first data sub-block carried on a first subcarrier and a second data sub-block carried on a second subcarrier;
• obtain a first modulated signal based on a first phase rotation factor in a first phase rotation factor set;
• obtain a second modulated signal based on a second phase rotation factor in a second phase rotation factor set;
• generate side information based on the first phase rotation factor and the second phase rotation factor;
• obtain a side information modulated signal based on mapping the side information to the first subcarrier;
• and
• generate a to-be-transmitted signal, wherein the to-be-transmitted signal is obtained by superposing the side information modulated signal, the first modulated signal, and the second modulated signal.

A non-transitory computer-readable medium comprising computer program instructions that, when run on a computer, cause the computer to perform a side information transmission method comprising:

• obtaining to-be-transmitted data, wherein the to-be-transmitted data comprises at least a first data sub-block carried on a first subcarrier and a second data sub-block carried on a second subcarrier;
• obtaining a first modulated signal and a second modulated signal based on a first phase rotation factor and a second phase rotation factor, wherein the first phase rotation factor is in a first phase rotation factor set and the second phase rotation factor is in a second phase rotation factor set;
• generating side information based on the first phase rotation factor and the second phase rotation factor;
• obtaining a side information modulated signal based on mapping the side information to the first subcarrier;
• and
• generating a to-be-transmitted signal by superposing the side information modulated signal, the first modulated signal, and the second modulated signal.