Data sending method, data receiving method, and related apparatus

A method for receiving data, performed by a network device, the method comprising:

• receiving first time domain data;
• performing frequency domain transform on the first time domain data to obtain frequency domain data;
• performing second phase rotation on the frequency domain data to obtain frequency domain rotated data, wherein the performing of the second phase rotation on the frequency domain data to obtain the frequency domain rotated data comprises:
• obtaining a phase factor corresponding to the frequency domain data and obtaining a phase factor corresponding to conjugate data of the frequency domain data, wherein each conjugate data comprises a respective conjugate-symmetric frequency-domain component;
• and
• performing phase rotation on the frequency domain data and the conjugate data based on the phase factor corresponding to the frequency domain data and the phase factor corresponding to the conjugate data to obtain the frequency domain rotated data;
• performing time domain transform on the frequency domain rotated data to obtain second time domain data;
• and
• performing first phase rotation on the second time domain data to obtain modulated data.

A terminal device, comprising:

• a memory with instructions stored thereon;
• one or more processors configured to execute the instructions from the memory and cause the terminal device to:
• perform first phase rotation on modulated data to obtain time domain rotated data;
• perform frequency domain transform on the time domain rotated data to obtain frequency domain data;
• perform second phase rotation on the frequency domain data to obtain frequency domain rotated data, wherein the performing of the second phase rotation comprises:
• obtaining a phase factor corresponding to the frequency domain data and obtaining a phase factor corresponding to conjugate data of the frequency domain data, wherein each conjugate data comprises a respective conjugate-symmetric frequency-domain component;
• and
• performing phase rotation on the frequency domain data and the conjugate data based on the phase factor corresponding to the frequency domain data and the phase factor corresponding to the conjugate data to obtain the frequency domain rotated data;
• perform time domain transform on the frequency domain rotated data to obtain time domain data;
• and
• send the time domain data.