发明名称 |
METHODS AND APPARATUS FOR POWER AMPLIFIER CALIBRATION |
摘要 |
Systems, methods and apparatus a provided for calibrating actual output power of a transmit power sensor for closed loop power control using a quality metric such as error vector magnitude (EVM) to improve power detection accuracy. In aspects, a method for correlating an output of a transmit power sensor with actual output power of a wireless transmitter includes deriving a characteristic correlation between an actual output power of a set of transmit amplifiers and an output power and of a set of corresponding power detection circuits over a range of transmit power levels in a corresponding set of wireless devices; storing the characteristic correlation in a wireless device that is not part of the set from which the characteristic correlation was derived; and sensing an output of a transmit power sensor of the device while the transmitter of the device transmits according to one or more gain settings.
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申请公布号 |
US2012264378(A1) |
申请公布日期 |
2012.10.18 |
申请号 |
US201213396435 |
申请日期 |
2012.02.14 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
STEELE GREGORY;KOHLMANN MICHAEL;GARDNER JAMES M. |
分类号 |
H04B17/00;H04B1/04;H04B1/38 |
主分类号 |
H04B17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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