Amplitude and phase calibration at a receiver chip in an antenna array
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United States of America Patent
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Feb 6, 2018
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app pub date -
May 4, 2017
filing date -
May 4, 2017
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Abstract
A calibration system, in a receiver chip, receives a plurality of receive signals at a plurality of receive paths. A first receive path and a second receive path is selected for a first receive signal and a second receive signal, respectively. A first signal parameter of the second receive signal is adjusted relative to the first signal parameter of the first receive signal to maximize a first signal strength value of an added signal or minimize a second signal strength value of a subtracted signal. Based on the adjusted first signal parameter, an offset of the first signal parameter is calibrated. Further, based on a matching of the second signal parameter in the second receive path relative to the second signal parameter in the first receive path, value of the second signal parameter is calibrated.
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