Method and apparatus for precoding channel state information reference signal
US9893777B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2015 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Jan 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for operating a base station includes allocating at least one respective CSI-RS port to each of a plurality of user equipments (UEs), precoding the at least one respective CSI-RS port with a first respective precoding matrix for each of the plurality of UEs, transmitting the at least one respective CSI-RS port precoded with the first respective precoding matrix through a channel to each of the plurality of UEs, receiving an index of a second respective precoding matrix from each of the plurality of UEs, wherein the second respective precoding matrix is determined according to the at least respective one CSI-RS port precoded with the first precoding matrix as received through the channel by each of the plurality of UEs, and precoding respective transmission data with the first respective precoding matrix and the second respective precoding matrix to each of the plurality of UEs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.