Channel measurement method and communications apparatus

A communications apparatus, comprising:

• at least one processor;
• and
• one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to:
• receive a precoded reference signal, wherein the precoded reference signal is obtained by precoding a reference signal based on K angle vectors and L delay vectors;
• generate first indication information, wherein:
• the first indication information is used to indicate P weighting coefficients corresponding to P angle-delay pairs;
• the P weighting coefficients are determined by using the precoded reference signal;
• the P angle-delay pairs and the P weighting coefficients corresponding to the P angle-delay pairs are used to determine a precoding matrix;
• each of the P angle-delay pairs comprises one of the K angle vectors and one of the L delay vectors;
• and
• P, K, and L are all positive integers;
• and
• send the first indication information.

A non-transitory computer-readable storage medium, storing a computer program for execution by at least one processor to implement operations comprising:

• receiving a precoded reference signal, wherein the precoded reference signal is obtained by precoding a reference signal based on K angle vectors and L delay vectors;
• generating first indication information, wherein:
• the first indication information is used to indicate P weighting coefficients corresponding to P angle-delay pairs;
• the P weighting coefficients are determined by using the precoded reference signal;
• the P angle-delay pairs and the P weighting coefficients corresponding to the P angle-delay pairs are used to determine a precoding matrix;
• each of the P angle-delay pairs comprises one of the K angle vectors and one of the L delay vectors;
• and
• P, K, and L are all positive integers;
• and
• sending the first indication information.