| 摘要 |
Embodiments of the present invention provide a channel state information feedback method and apparatus, user equipment and a base station, where the method includes: pre-synchronizing, with a BS, a basis matrix that includes sparsity of CSI in a frequency domain and a space domain; receiving pilot information sent by the BS; determining, according to the pilot information, a CSI information matrix that includes information about the frequency domain and the space domain of CSI; determining to-be-transmitted data by using the CSI information matrix; and feeding back the to-be-transmitted data to the BS, so that the BS restores the corresponding CSI information from the to-be-transmitted data by using a basis matrix that is pre-synchronized with UE and includes the sparsity of the CSI in the frequency domain and the space domain. In the embodiments of the present invention, CSI feedback efficiency is improved, and feedback overheads between a UE end and a BS end are reduced, thereby improving spectrum utilization in wireless communication. |
