Method and device for feeding back channel state information in multi-input multi-output system
US10505601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2015 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Oct 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and device for feeding back Channel State Information (CSI) in a multi-input multi-output system are provided. In the method, User Equipment (UE) feeds back CSI comprising codebook index information to an evolved Node B (eNodeB). The codebook index information may include a first type of codebook index set I and a second type of codebook index set J, where a combination of the first type of index set I and the second type of index set J is used for indicating a precoding matrix U, and the precoding matrix U is an Nt×r matrix and is composed of at least Q×r basic vectors having a dimension of Nt/Q. The basic vectors are columns extracted from a matrix B composed of M columns of Nt/Q-dimensional vectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.