FIELD: radio engineering, communication.
SUBSTANCE: invention discloses a method of collecting channel state information, which includes the following steps: user equipment reporting codebook index information and information on the total number of levels to a base station (eNB), wherein the codebook index information includes one of the following: class 2 codebook index 1; and class 1 codebook index i and index j parameter; after receiving the codebook index information and information on the total number of levels sent by the user equipment, the base station obtains a codeword by querying a predetermined list of codebooks or by querying a predetermined list of codebooks and combining with a calculation in accordance with the codebook index information and information on the total number of levels.
EFFECT: collecting channel state information compatible with SU-MIMO and MU-MIMO and which provides the required characteristics of the MU-MIMO system.
21 cl, 2 dwg
