Beamforming weight generation using adaptive trigonometric waveform interpolation techniques
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United States of America Patent
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Mar 26, 2013
Grant Date -
Feb 24, 2011
app pub date -
Aug 19, 2009
filing date -
Aug 19, 2009
priority date (Note) -
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Abstract
Techniques are provided herein to generate beamforming weight vectors for transmissions to be made from a first wireless communication device, e.g., a base station, to a second wireless communication device, e.g., a client device. The first device has a plurality of antennas and receives uplink transmissions from the second device, each uplink transmission comprising a group of frequency subcarriers. The first device computes channel information from the received uplink transmission and computes one or more trigonometric waveforms determined to approximate the channel information. One or more downlink beamforming weight vectors are computed at any given frequency subcarrier (thus in any frequency subband) by interpolation using the one or more trigonometric waveforms.
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