Precoding method for transmitting information in a MIMO radio system
US7706469B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2006 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Feb 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03802
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of transmitting a transmit vector comprising symbols to be delivered within a resource unit from a transmitting station with one or more transmit antennas to one or more receiving stations with one or more receive antennas. The method comprises obtaining information on the state of channels between the one or more transmit antennas and the one or more receive antennas; and computing, on the basis of the channel states between the one or more transmit antennas and the one or more receive antennas, a covariance matrix Rnn, a combined channel matrix H, and a block-diagonal linear operator V of decoding matrices of the receiving stations. The transmit vector is multiplied with a precoding matrix P fulfilling the equations(HHVHVH=λI)P=HHVH Vi(HiPPHHiH+Rnn,i)=PiHHiH, i=1 . . . Ktrace(PHP)=Ptr and corresponding performing filtering in the receiving station using a receiver filter corresponding to the block-diagonal linear operator V.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.