Channel information feedback method, channel information determining method, receive end device, and transmit end device

A channel information determining method, wherein the method comprises:

• receiving at least one piece of description information generated for each of a plurality of subbands comprised in a wideband, wherein each piece of description information is used to describe a description vector of a channel matrix corresponding to the subband, the description information comprises at least one of a vector parameter and a weighting parameter, the vector parameter is used to indicate at least two component vectors of the description vector, the weighting parameter is used to indicate a weight of each of the at least two component vectors, and the at least two component vectors are selected from a base codebook;
• and
• determining, based on each piece of description information, the description vector corresponding to the description information.

A receive end device, comprising:

• a generation module, configured to generate at least one piece of description information for each of a plurality of subbands comprised in a wideband, wherein each piece of description information is used to describe a description vector of a channel matrix corresponding to the subband, the description information comprises at least one of a vector parameter and a weighting parameter, the vector parameter is used to indicate at least two component vectors of the description vector, the weighting parameter is used to indicate a weight of each of the at least two component vectors, and the at least two component vectors are selected from a base codebook;
• and
• a sending module, configured to send the at least one piece of description information.

A transmit end device, comprising:

• a receiving module, configured to receive at least one piece of description information generated for each of a plurality of subbands comprised in a wideband, wherein each piece of description information is used to describe a description vector of a channel matrix corresponding to the subband, the description information comprises at least one of a vector parameter and a weighting parameter, the vector parameter is used to indicate at least two component vectors of the description vector, the weighting parameter is used to indicate a weight of each of the at least two component vectors, and the at least two component vectors are selected from a base codebook;
• and
• a determining module, configured to determine, based on each piece of description information, the description vector corresponding to the description information.