Method and apparatus for transmitting channel state information in wireless communication system
US9509383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2014 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Apr 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0639
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a wireless communication system. According to one embodiment of the present invention, a method for transmitting, by a terminal, channel state information (CSI) in a wireless communication system comprises the steps of: subsampling a code book for four antenna ports, including sixteen precoding matrixes; and feeding back the CSI on the basis of the subsampled code book, wherein the CSI includes at least one of a rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI), and if the RI is 3, the subsampled code book can be determined so as to minimize a chordal distance between subsampled code words.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.