Method and apparatus for information feedback and precoding
US9042474B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2010 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Apr 7, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0634
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses for information feedback and precoding have been provided. A method for processing communication data at a user equipment in a wireless communication system may comprise: deriving a spatial correlation matrix R of multiple transmit antennas of a base station based on an obtained downlink channel transmission matrix H; transforming a precoding codebook F according to the spatial correlation matrix R; selecting a precoding matrix Fs based on the transformed precoding codebook; and feeding back information about the spatial correlation matrix R and information about the selected precoding matrix Fs to the base station. A method for data precoding at a base station in a wireless communication system may comprise: obtaining, from a user equipment, information about a spatial correlation matrix R of multiple transmit antennas of the base station and information about a precoding matrix Fs selected by the user equipment; determining a desired precoding matrix FR,s based on the obtained information and a precoding codebook; and precoding downlink data to be transmitted to the user equipment with the desired precoding matrix FR,s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.