US2016020834A1PendingUtilityA1

Downlink transmit beamforming

52
Assignee: INTEL CORPPriority: Dec 30, 2004Filed: Jun 4, 2015Published: Jan 21, 2016
Est. expiryDec 30, 2024(expired)· nominal 20-yr term from priority
Inventors:Xintian LiQinghua Li
H04B 7/0413H04L 1/0681H04B 7/0617H04B 7/0643
52
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Claims

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.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
         1 . 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.

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