Phase noise estimation for MIMO communication
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United States of America Patent
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Mar 10, 2015
Grant Date -
Sep 25, 2014
app pub date -
Jun 14, 2013
filing date -
Mar 19, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The system and method of the present disclosure exploit the fact that an undesired phase offset between signals up-converted and transmitted by transmitters of at least two transceivers is correlative with a phase offset between signals received and down-converted by receivers of the at least two transceivers. Such correlation occurs when the transmitter and receiver in each of the at least two transceivers share the same local oscillator and thus experience the same or very similar random phase noise. Using this fact, the system and method of the present disclosure are configured to measure the phase offset between signals received and down-converted by the receivers of the at least two transceivers and then use the measured phase offset to compensate for the phase offset between the signals up-converted by the transmitters of the at least two transceivers. This compensation allows MIMO communication, such as spatial multiplexing, to be better performed.
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