Methods for inter-user interference indication feedback and usage in MU-MIMO wireless systems
US8902921B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2012 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Dec 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0224
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention proposes methods for facilitating and improving the performance of MU-MIMO transmission in wireless communication systems. Each user within a MU group inserts an inter-user interference indication field in its acknowledgement packet. The inter-user interference indication field includes signal-to-interference-noise-ratio (SINR) and interference source information. The MU-MIMO transmitter extracts inter-user interference indication feedback and improves subsequent MU-MIMO transmission. Feedback of the inter-user interference information such as SINR and interference source allows efficient link adaptation, smarter user selection, channel re-sounding selection, and fine-tuning of precoding matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.