Dynamic interference alignment for partially connected quasi-static MIMO interference channel
US9001914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Jun 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/541
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems, methods, and apparatus are described that employ specially designed interference patterns to build an in-band side channel without degrading the effective throughput of the main channel. Transmitter and receiver pairs implement a two-stage dynamic interference mitigation scheme based on the partial connections in limited dimension MIMO interference channels. The first stage determines the stream assignments and the subspace constraints for beamforming vectors and zero-forcing vectors based on the partially connected topology such as the path loss, shadowing and spatial correlation. The second stage determines the beamforming vectors and the zero-forcing vectors based on the instantaneous channel state information over the subspaces obtained from the first stage. In an aspect, a controller device implements the first and second stage and assigns the transmitter and receiver pairs to perform interference alignment using the stream assignments and beamforming and zero-forcing vectors respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.