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US 2014/0153662 A1Published application
Downlink transmit beamforming
AssigneeIntel Corporation
InventorsXintian E. Lin, Qinghua Li
Life of this patent
Estimating the term…
Abstract
A wireless network access point can operate as a closed loop MIMO device when communicating with a station that is operating as an open loop MIMO device. Transmit/receive chains in the access point are calibrated to support aggregate channel reciprocity.
Claims1
A method comprising:
- calibrating a plurality of transmit/receive chains in a wireless network access point device, wherein calibrating comprises adjusting gain values to make transmitter gain to receiver gain ratios substantially equal;
- receiving a packet from a station having a first antenna and a second antenna;
- determining a downlink beamforming matrix;
- and
- transmitting two data streams to the station.
2 more elements
Dependencies are inferred from the claim text.