Method for feeding back channel state information, base station and user equipment
US10193609B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2016 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Dec 29, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0639
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for feeding back CIS includes: dividing a plurality of antenna ports into a plurality of groups of antenna ports; configuring for each group a same intra-group codebook set consisting of a plurality of intra-group precoding matrices, allocating for each group a plurality of different reference signals corresponding to a same reference resource, and configuring for each antenna port in each group a precoded reference signal acquired after a precoding operation using the intra-group precoding matrices, the number of the reference resources corresponding to the number of the intra-group precoding matrices in the intra-group codebook set, and the number of the reference signals corresponding to each reference resource corresponding to the number of groups of inter-group antenna ports; transmitting the precoded reference signal to a UE via each antenna port; and receiving the CSI fed back by the UE after measurement on the reference signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.