MIMO transmitter for transmitting a group of sequential OFDM symbols using a plurality of antennas
US8396147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2010 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Apr 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A MIMO transmitter and method for transmitting a group of sequential OFDM symbols on a downlink channel using a plurality of antennas is disclosed herein. Groups of OFDM subcarriers are individually modulated in accordance with spatial-frequency subcarrier modulation assignments to generate groups of symbol-modulated subcarriers, corresponding symbol-modulated subcarriers are combined for transmission on each of a plurality of spatial channels, and beamforming is performed on the combined symbol-modulated subcarriers for transmission over the spatial channels. The channel comprises a plurality of the groups of the OFDM subcarriers and the OFDM subcarriers within each group of subcarriers and within each group of sequential OFDM symbols have the same spatial-frequency subcarrier modulation assignments. The spatial-frequency subcarrier modulation assignments for each group are determined based on feedback by a receiver, which is determined from spatial channel characteristics of the spatial channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.