Dynamic clear channel assessment using spectrum intelligent interference nulling
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United States of America Patent
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May 6, 2014
Grant Date -
Jan 10, 2013
app pub date -
Jul 7, 2011
filing date -
Jul 7, 2011
priority date (Note) -
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Abstract
At a wireless device operating in an unlicensed frequency band, energy received at a plurality of antennas is analyzed to detect interference on a channel in the unlicensed frequency band. The type of interference detected in the received energy is determined. Parameters are then generated for a nulling filter based on the type of interference detected in the received energy. The nulling filter is applied to the received energy at the plurality of antennas to produce a spatially filtered output. The spatially filtered output is evaluated to determine whether to send a transmission on the channel in the unlicensed frequency band.
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