Precoding processing method and communication apparatus

A precoding processing method, comprising:

• receiving, by a receiving apparatus, precoding information, wherein the precoding information comprises one or more of the following:
• a precoding codebook, a power of a precoding port, a power of a precoding data stream, or a correspondence between the precoding port and the precoding data stream, wherein one precoding data stream corresponds to one or more precoding ports, the precoding codebook comprises a frequency domain codebook, and the power of the precoding data stream is reported by the sending apparatus, wherein the frequency domain codebook is a codebook in which amplitudes of subcarriers are the same and a phase difference between the subcarriers is constant within a preset frequency band range;
• and
• transmitting, by the receiving apparatus, data based on the precoding information.

A sending apparatus, comprising:

• a processor, configured to determine precoding information, wherein the precoding information comprises one or more of the following:
• a precoding codebook, a power of a precoding port, a power of a precoding data stream, or a correspondence between the precoding port and the precoding data stream, wherein one or more precoding ports correspond to one precoding data stream, the precoding codebook comprises a frequency domain codebook, and the power of the precoding data stream is reported by the sending apparatus, wherein the frequency domain codebook is a codebook in which amplitudes of subcarriers are the same and a phase difference between the subcarriers is constant within a preset frequency band range;
• and
• a transceiver, configured to transmit the precoding information.