Method and apparatus for transmitting/receiving CSI-RS operating in massive MIMO system FDD mode
US9635642B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 27, 2012 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0091
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for beamforming and information feedback are provided. Signals for beams to be transmitted through corresponding antenna ports, are generated. The beams are formed by precoding the signals with beamforming vectors. The beams are sorted into a number of resource reuse groups based on a resource that is to be shared. The beams are transmitted, using resources allocated per group, to a receiver. Feedback information is generated on at least one antenna port, based on the received beams. The feedback information is transmitted to the transmitter. A beam is selected having a greatest gain for a transmitter using the feedback information. A transmission resource is allocated for the selected beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.