Base station apparatus and information feedback method
US8780839B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2010 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Jan 8, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03949
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To suitably transmit feedback information for rank adaptation and precoding in uplink MIMO transmission to a user apparatus as feedback, a base station apparatus (200) is characterized by having a precoding weight/rank number selecting section (232) that determines rank information associated with the number of layers of spatial multiplexing in uplink, while determining a control amount of a transmission phase and/or transmission amplitude used in weighting for transmission antennas of a user apparatus, and transmission/reception sections (206a), (206b) that transmit the rank information determined in the precoding weight/rank number selecting section (232) to a mobile station (100) using an RRC signal, while transmitting the control amount to the mobile station (100) using a control channel signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.