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    • 1. 发明申请
    • METHODS AND APPARATUS FOR POWER AMPLIFIER CALIBRATION
    • 功率放大器校准的方法和装置
    • WO2012142181A1
    • 2012-10-18
    • PCT/US2012/033154
    • 2012-04-11
    • QUALCOMM IncorporatedSTEELE, GregoryKOHLMANN, MichaelGARDNER, James, M.
    • STEELE, GregoryKOHLMANN, MichaelGARDNER, James, M.
    • H04B17/00H03G3/30
    • H03G3/3042H04B17/13
    • This disclosure provides systems, methods and apparatus 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 one aspect a method for correlating an output of a transmit power sensor with actual output power of a wireless transmitter is provided. The method 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 communication devices. The method further includes storing the characteristic correlation in a wireless device that is not part of the set from which the characteristic correlation was derived. The method further includes sensing an output of a transmit power sensor of the wireless device while the wireless transmitter of the wireless device transmits according to one or more first gain settings. The method further includes producing an estimate of actual output power based at least in part on the characteristic correlation. The method further includes adjusting gain setting data based at least in part on the estimate of actual output power.
    • 本公开提供了使用诸如误差矢量幅度(EVM)的质量度量来校准发射功率传感器的闭环功率控制的实际输出功率的系统,方法和装置,以提高功率检测精度。 在一个方面,提供了一种用于将发射功率传感器的输出与无线发射机的实际输出功率相关联的方法。 该方法包括在相应的一组无线通信设备中的发射功率电平的范围内导出一组发射放大器的实际输出功率与输出功率与一组相应功率检测电路之间的特性相关性。 该方法还包括将特征相关性存储在不是从其导出特征相关性的集合的一部分的无线设备中。 该方法还包括在无线设备的无线发射机根据一个或多个第一增益设置发射时,感测无线设备的发射功率传感器的输出。 该方法还包括至少部分地基于特征相关性产生实际输出功率的估计。 该方法还包括至少部分地基于实际输出功率的估计来调整增益设置数据。