Systems and methods for forward link closed loop beamforming
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United States of America Patent
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Jan 3, 2012
Grant Date -
Jan 10, 2008
app pub date -
Jan 18, 2007
filing date -
Jan 20, 2006
priority date (Note) -
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Abstract
Methods of forming a beam to a wireless terminal from a transmitter including an antenna having a plurality of antenna feed elements include generating channel estimates at the wireless terminal, obtaining channel phase information from the channel estimates, quantizing the channel phase information to obtain quantized channel phase values, and transmitting the quantized channel phase values to the transmitter. The methods may further include receiving the quantized channel phase values at the transmitter, obtaining channel gain estimates, constructing channel estimates using the quantized channel phase values and the channel gain estimates, and determining transmit beamforming weights in response to the channel estimates. Related transmitters, wireless terminals, and communications systems are also disclosed.
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