MIMO receiver using maximum likelihood detector in combination with QR decomposition
US8428159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2009 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Sep 4, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03426
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A MIMO receiver is provided with a preprocessor for performing QR decomposition of a channel matrix H wherein the factored reduced matrix R is used in place of H and Q*y is used in place of the received vector y in a maximum likelihood detector (“MLD”). The maximum likelihood detector might be a hard-decision MLD or a soft-decision MLD. A savings of computational complexity can be used to provide comparable results more quickly, using less circuitry, and/or requiring less consumed energy, or performance can be improved for a fixed amount of time, circuitry and/or energy. Where the MLD uses approximations, such as finite resolution calculations (fixed point or the like) or L1 Norm approximations, the reduced number of operations resulting from using the reduced matrix results in improved approximations as a result of the finite resolution operations. Other methods of reducing the channel matrix might be used for suitable and/or cumulative advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.