Antenna array calibration for wireless communication systems
First Claim
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1. A method of calibrating an antenna array, comprising:
- determining first calibration weights for the antenna array using phase only estimates based upon a first calibration technique;
determining second calibration weights for the antenna array using phase and amplitude estimates based upon a second calibration technique; and
determining whether to apply the first calibration weights from the first calibration technique or the second calibration weights from the second calibration technique to the antenna array based on (a) an output provided by utilizing the first calibration weights, (b) an output provided by utilizing the second calibration weights, or (c) both (a) and (b).
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Abstract
Calibration for a transmit chain of a device transmitting information to multiple devices over wireless links includes selecting from between two or more calibration determination techniques. In certain aspects the techniques include phase only calibration and phase and amplitude calibration.
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Citations
20 Claims
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1. A method of calibrating an antenna array, comprising:
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determining first calibration weights for the antenna array using phase only estimates based upon a first calibration technique; determining second calibration weights for the antenna array using phase and amplitude estimates based upon a second calibration technique; and determining whether to apply the first calibration weights from the first calibration technique or the second calibration weights from the second calibration technique to the antenna array based on (a) an output provided by utilizing the first calibration weights, (b) an output provided by utilizing the second calibration weights, or (c) both (a) and (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A 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 first calibration weights to apply for communication with the at least two antennas using phase only estimates based upon one of at least two calibration types; determine second calibration weights to apply for communication with the at least two antennas using phase and amplitude estimates based upon another of the at least two calibration types; and determine the calibration type to apply, for communication with the at least two antennas, from the at least two calibration types based on (a) an output provided by utilizing the first calibration weights, (b) an output provided by utilizing the second calibration weights, or (c) both (a) and (b), wherein the one of the at least two calibration types is different from the another of the at least two calibration types. - View Dependent Claims (11, 12, 13, 14, 15)
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16. An apparatus for calibrating an antenna array, comprising:
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means for determining first calibration weights for the antenna array using phase only estimates based upon a first calibration technique; means for determining second calibration weights for the antenna array using phase and amplitude estimates based upon a second calibration technique; and means for determining whether to apply the calibration weights from the first calibration technique or the second calibration technique to the antenna array based on (a) an output provided by utilizing the first calibration weights, (b) an output provided by utilizing the second calibration weights, or (c) both (a) and (b). - View Dependent Claims (17, 18, 19)
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20. A non-transitory processor readable medium storing processor readable instructions for causing a processor to:
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determine first calibration weights for an antenna array using phase only estimates based upon a first calibration technique; determine second calibration weights for the antenna array using phase and amplitude estimates based upon a second calibration technique; and determine whether to apply the calibration weights from the first calibration technique or the second calibration technique to the antenna array based on (a) an output provided by utilizing the first calibration weights, (b) an output provided by utilizing the second calibration weights, or (c) both (a) and (b).
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Specification