Beamforming in MIMO communication systems
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United States of America Patent
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Sep 3, 2013
Grant Date -
Sep 13, 2012
app pub date -
May 18, 2012
filing date -
Jan 22, 2008
priority date (Note) -
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Abstract
A communication terminal includes first and second transmitters, which are coupled to produce respective first and second Radio Frequency (RF) signals that are phase-shifted with respect to one another by a beamforming phase offset, and to transmit the RF signals toward a remote communication terminal. The terminal includes a reception subsystem including first and second receivers and a phase correction unit. The first and second receivers are respectively coupled to receive third and fourth RF signals from the remote communication terminal. The phase correction unit is coupled to produce, responsively to the third and fourth RF signals, a phase correction for correcting an error component in the beamforming phase offset.
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