Precoding matrix indicating and determining method and communications apparatus

A communications apparatus, comprising:

• at least one processor configured with processor-executable instructions to perform operations including:
• sending a first index;
• receiving first indication information, wherein the first indication information indicates reported space domain vectors, reported frequency domain vectors and weighting coefficients used to construct a precoding matrix, wherein the first index is for determining the reported space domain vectors, the reported frequency domain vectors, and the weighting coefficients;
• and
• determining the precoding matrix based on the first indication information.

A non-transitory computer-readable media storing computer instructions that configure at least one processor, upon execution of the instructions, to perform the following steps:

• sending a first index;
• receiving first indication information, wherein the first indication information indicates reported space domain vectors, reported frequency domain vectors and weighting coefficients used to construct a precoding matrix, wherein the first index is for determining the reported space domain vectors, the reported frequency domain vectors, and the weighting coefficients;
• and
• determining the precoding matrix based on the first indication information.