Channel state information reporting method and related device

A communication apparatus comprising:

• at least one processor, and one or more memories communicatively coupled to the at least one processor and being configured to store programming instructions for execution by the at least one processor to perform operations comprising:
• generating indication information comprising a first group of indication information and a second group of indication information, wherein:
• the first group of indication information comprises reference amplitude indication information corresponding to each spatial layer of a precoding matrix, and differential amplitude indication information and phase indication information of X weighting coefficients;
• the second group of indication information comprises differential amplitude indication information and phase indication information of Y weighting coefficients;
• and
• values of X and Y are related to a first parameter, a sum of X and Y is equal to K−v, K is a total quantity of weighting coefficients correspondingly reported at all of the spatial layers, v is a quantity of the spatial layers, K is an integer, X is an integer that is not less than 0, Y is a positive integer, and v is a positive integer;
• and
• sending the indication information.

A communication apparatus comprising:

• at least one processor, and one or more memories communicatively coupled to the at least one processor and being configured to store programming instructions for execution by the at least one processor to perform operations comprising:
• receiving indication information comprising a first group of indication information and a second group of indication information, wherein:
• the first group of indication information comprises reference amplitude indication information corresponding to each spatial layer of a precoding matrix, and differential amplitude indication information and phase indication information of X weighting coefficients;
• the second group of indication information comprises differential amplitude indication information and phase indication information of Y weighting coefficients;
• and
• values of X and Y are related to a first parameter, a sum of X and Y is equal to K−v, K is a total quantity of weighting coefficients correspondingly reported at all of the spatial layers, v is a quantity of the spatial layers, K is an integer, X is an integer that is not less than 0, Y is a positive integer, and v is a positive integer;
• and
• determining, based on the indication information, a weighting coefficient correspondingly reported by a terminal device.