Feedback scheduling to reduce feedback rates in MIMO systems
US8675743B2 · kind B2 · utility
10Cited by
2References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2007 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Dec 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03808
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a closed-loop wireless communication system, a codebook-based feedback control mechanism is provided where feedback from each of a plurality of receivers is scheduled to control the feedback so that the receiving devices do not needlessly feed back precoding information to the transmitting device. The feedback may be controlled by establishing and distributing a schedule to control when each receiver feeds back precoding information, or by establishing and distributing a metric-based feedback threshold that must be satisfied before feedback is permitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.