Efficient computation of spatial filter matrices for steering transmit diversity in a MIMO communication system
US7110463B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2004 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | Mar 3, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0697
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one channel response matrix, and a spatial filter matrix for each transmission span may be computed based on the initial spatial filter matrix and a steering matrix used for that transmission span. The channel response matrices may be partially correlated if the MIMO channel is not static but does not change abruptly. In this case, a spatial filter matrix may be derived for one transmission span l and used to derive an initial spatial filter matrix for another transmission span m. A spatial filter matrix for transmission span m may be computed based on the initial spatial filter matrix, e.g., using an iterative procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.