Methods and devices for reporting and processing channel state information, and storage medium

A method for processing channel state information (CSI), comprising:

• receiving CSI of each subband in a first set and a relative value of each subband in a second set which are sent by a terminal, wherein the relative value is a relative value between CSI of the each subband in the second set and CSI of a reference subband corresponding to the each subband in the second set, a sum of a number of subbands in the first set and a number of subbands in the second set is M, and M is an integer greater than 1;
• and
• determining CSI of the each subband in the second set according to the relative value of the each subband in the second set and the CSI of the reference subband corresponding to the each subband in the second set;
• wherein the reference subband corresponding to the each subband in the second set comprises at least one subband in the first set or a subband adjacent to the each subband in the second set, wherein a reference subband of at least one subband in the second set is at least one subband in the first set;
• and
• wherein determining the CSI of the each subband in the second set according to the relative value of the each subband in the second set and the CSI of the reference subband corresponding to the each subband in the second set comprises:
• determining the CSI of the each subband in the second set by substituting the relative value of the each subband in the second set and CSI of the subband adjacent to the each subband in the second set into a second preset function.