Interference cancellation in TDD massive MIMO wireless systems
US9455816B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2014 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Jun 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Directed inter-cell interference experienced by the downlink of a massive MIMO wireless communication network base station due to pilot contamination that occurs as a result of pilot signal reuse is significantly reduced by encoding signals to be transmitted over the downlink into robust signals. The robust signals along with corresponding beamforming vectors are transmitted over the downlink where the beamforming vectors are estimated by the base station using received fast fading pilot sequences. The encoding is performed by an interference cancellation algorithm whose use is proper when the communication network can be characterized as having one transmitter at each of its nodes (i.e., the base stations) and all the channel coefficients of the network are known by every node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.