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|1. (WO2017152749) FEEDBACK METHOD AND APPARATUS FOR CHANNEL STATE INFORMATION|
|Applicants:||CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY
|Title:||FEEDBACK METHOD AND APPARATUS FOR CHANNEL STATE INFORMATION|
Provided are a feedback method and apparatus for channel state information. The feedback method comprises: determining a first pre-coding matrix in a first pre-coding matrix set, and determining a first pre-coding matrix index value corresponding to the first pre-coding matrix; determining a second pre-coding matrix in a second pre-coding matrix set, and determining a second pre-coding matrix index value corresponding to the second pre-coding matrix, wherein the second pre-coding matrix comprises a beam selection section for selecting a beam in each antenna group and a phase adjustment section for adjusting a phase among a plurality of antenna groups; and feeding back the first pre-coding matrix index value and the second pre-coding matrix index value to an access device, the access device using the first pre-coding matrix index value and the second pre-coding matrix index value to select the corresponding pre-coding matrix from the first pre-coding matrix set and the second pre-coding matrix set, and after an operation is performed, the corresponding pre-coding matrix being used as a pre-coding matrix for data transmission.