Smoothing beamforming matrices across sub-carriers
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United States of America Patent
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Feb 16, 2021
Grant Date -
Aug 22, 2019
app pub date -
Feb 11, 2019
filing date -
Feb 22, 2018
priority date (Note) -
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Abstract
A wireless transmitter includes a radio interface and transmitter circuitry. The radio interface includes multiple transmit antennas. The transmitter circuitry is configured to hold multiple steering matrices specifying weights to be applied to one or more spatial streams transmitted via the multiple transmit antennas to a receiver that includes one or more receive antennas, the multiple steering matrices are specified over multiple sub-carriers, to calculate smoothed weights, by applying to the weights of the steering matrices phase-only corrections that reduce phase variations among the weights of the steering matrices over the sub-carriers, and to transmit to the receiver beam-formed transmissions of the one or more spatial streams over the sub-carriers, by applying to the spatial streams the smoothed weights in the respective sub-carriers.
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