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Bi-Directional Beamforming Multiple-Input Multiple-Output Wireless Communication

  • US 20090116569A1
  • Filed: 10/13/2008
  • Published: 05/07/2009
  • Est. Priority Date: 11/05/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • at a first device comprising a first plurality of antennas;

    receiving at the first plurality of antennas a plurality of uplink signal streams that were beamformed from a second device to the first device;

    computing a plurality of downlink beamforming weight vectors from signals resulting from reception at the first plurality of antennas of the plurality of signal streams beamformed by the second device;

    applying the plurality of downlink beamforming weight vectors to a plurality of downlink signal streams for simultaneous beamform transmission via the first plurality of antennas of the first device to the second device;

    at the second device comprising a second plurality of antennas;

    receiving at the second plurality of antennas the plurality of downlink signal streams that were beamformed by the first device;

    computing a plurality of uplink beamforming weight vectors from signals resulting from reception at the second plurality of antennas of the plurality of downlink signal streams beamformed by the first device;

    applying the plurality of uplink beamforming weight vectors to a plurality of uplink signal streams for simultaneous beamform transmission via the second plurality of antennas of the second device to the first device.

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