Delay compensation for transmit/receive chain calibration and multiuser MIMO
US8005131B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jun 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/373
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Compensation is provided for errors in channel information that can result when there is a delay between the measurement of the channel information and the subsequent use of the channel information. In one embodiment, downlink channel prediction is performed within a user device, in a system employing closed loop MIMO with implicit feedback, to reduce the occurrence of errors during the calculation of a calibration parameter within an associated base station. In another embodiment, channel prediction is used to predict a downlink channel state for a user device at a future time when a multi-user MIMO data transfer is to occur between a base station and a number of selected user devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.