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    Envelope tracking (ET) closed-loop on-the-fly calibration
    1.
    发明授权
    Envelope tracking (ET) closed-loop on-the-fly calibration 有权

    公开(公告)号：US09998241B2

    公开(公告)日：2018-06-12

    申请号：US14625949

    申请日：2015-02-19

    Applicant: MEDIATEK INC.

    Inventor： Chiou-Wei Tsai ,  Chia-Sheng Peng ,  Sheng-Hong Yan

    IPC: H04B17/13 ,  H03F1/32 ,  H03F1/02

    CPC classification number: H04B17/13 ,  H03F1/02 ,  H03F1/32

    Abstract: Apparatus and methods are provided to calibrate a closed-loop envelop tracking system for a power amplifier of a wireless transmitter using standardized modulation signals. In one novel aspect, a closed-loop adaptive method is used to track changes in PA nonlinearity due to environmental or circuitry changes during operating condition using standardized modulation signals. In one embodiment, the PA supply voltage compensation lookup table (LUT) and/or the phase compensation LUT is updated during normal operation to sustain good linearity and efficiency performance. In another novel aspect, the PA target response is adjusted in response to changes in PA-related system configuration, such as changes in PA bias settings, and/or indicators measured from the transmitter such as changes in impedance or temperature changes for the RF module or the PA module. The PA supply voltage compensation LUT and/or the phase LUT is updated accordingly upon adjustment of the PA target response.

    Envelope Tracking (ET) Closed-Loop On-the-Fly Calibration
    5.
    发明申请
    Envelope Tracking (ET) Closed-Loop On-the-Fly Calibration 有权
    信封跟踪（ET）闭环动态校准

    公开(公告)号：US20160249300A1

    公开(公告)日：2016-08-25

    申请号：US14625949

    申请日：2015-02-19

    Applicant: MEDIATEK INC.

    Inventor： Chiou-Wei Tsai ,  Chia-Sheng Peng ,  Sheng-Hong Yan

    IPC: H04W52/22 ,  H04B17/13

    CPC classification number: H04B17/13 ,  H03F1/02 ,  H03F1/32

    Abstract: Apparatus and methods are provided to calibrate a closed-loop envelop tracking system for a power amplifier of a wireless transmitter using standardized modulation signals. In one novel aspect, a closed-loop adaptive method is used to track changes in PA nonlinearity due to environmental or circuitry changes during operating condition using standardized modulation signals. In one embodiment, the PA supply voltage compensation lookup table (LUT) and/or the phase compensation LUT is updated during normal operation to sustain good linearity and efficiency performance. In another novel aspect, the PA target response is adjusted in response to changes in PA-related system configuration, such as changes in PA bias settings, and/or indicators measured from the transmitter such as changes in impedance or temperature changes for the RF module or the PA module. The PA supply voltage compensation LUT and/or the phase LUT is updated accordingly upon adjustment of the PA target response.

    Abstract translation: 提供装置和方法来使用标准化的调制信号来校准无线发射机的功率放大器的闭环包络跟踪系统。 在一个新颖的方面中，使用闭环自适应方法来跟踪由于在使用标准化调制信号的操作条件下的环境或电路变化而导致的PA非线性变化。 在一个实施例中，在正常操作期间更新PA电源电压补偿查找表（LUT）和/或相位补偿LUT以维持良好的线性度和效率性能。 在另一个新颖的方面，响应于PA相关系统配置的变化（例如PA偏置设置的变化）和/或从发射器测量的指示器（例如RF模块的阻抗或温度变化的变化）来调整PA目标响应 或PA模块。 PA调节PA目标响应后，相应地更新PA供电电压补偿LUT和/或相位LUT。

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