Antenna array calibration for multi-input multi-output wireless communication systems
First Claim
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1. A method of calibrating an antenna array in a wireless network, comprising:
- receiving first channel estimate information each corresponding to transmissions to at least two antennas of at least two access terminals;
determining second channel estimate information each corresponding to transmissions from the at least two antennas of the at least two access terminals; and
determining a calibration ratio based upon each of the first channel estimate information and each of the second channel estimate information.
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Abstract
Calibration for a transmit chain of a device transmitting information to multiple devices over wireless links and receive chains of the multiple devices receiving information over one of the wireless links utilizing each of the estimates for different antennas of an access terminal as a separate estimate.
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Citations
28 Claims
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1. A method of calibrating an antenna array in a wireless network, comprising:
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receiving first channel estimate information each corresponding to transmissions to at least two antennas of at least two access terminals;
determining second channel estimate information each corresponding to transmissions from the at least two antennas of the at least two access terminals; and
determining a calibration ratio based upon each of the first channel estimate information and each of the second channel estimate information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An wireless communication apparatus comprising:
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at least two antennas; and
a processor coupled with the at least two antennas, the processor configured to determine a calibration ratio, based upon first channel estimate information each corresponding to transmissions to at least two antennas of at least two access terminals and second channel estimate information each corresponding to transmissions from the at least two antennas of the at least two access terminals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus comprising:
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means for processing first channel estimate information each corresponding to transmissions to at least two antennas of at least two access terminals and received from the at least two access terminals;
means for determining second channel estimate information each corresponding to transmissions from the at least two antennas of the at least two access terminals; and
means for determining a calibration ratio based upon each of the first channel estimate information and each of the second channel estimate information. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27)
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28. A processor-readable medium having stored thereon instructions for use by a processor, the instructions comprise instructions to:
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process first channel estimate information each corresponding to transmissions to at least two antennas of at least two access terminals and received from the at least two access terminals;
determine second channel estimate information each corresponding to transmissions from the at least two antennas of the at least two access terminals; and
determine a calibration ratio based upon each of the first channel estimate information and each of the second channel estimate information.
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Specification