Unified closed loop SU/MU-MIMO signaling and codebook design
US8254486B2 · kind B2 · utility
9Cited by
0References
15Claims
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Assignee
Inventors
Key dates
| Filing date | Sep 28, 2007 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Nov 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03802
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A multi-resolution codebook is used to provide quantization for channel related information in a wireless network that supports both single-user MIMO and multi-user MIMO. The multi-resolution codebook may include a higher resolution “fine” codebook for use with MU-MIMO subscriber stations and a lower resolution “coarse” codebook for use with SU-MIMO subscriber stations. A tracking codebook may also be used to provide quantization for updates to channel related information. In at least one embodiment, the tracking codebook includes a number of unit vectors (or orthogonal matrices) disposed upon a sphere cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.