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    Envelope Tracking (ET) Closed-Loop On-the-Fly Calibration
    22.
    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。

    RF RECEIVER AND DIGITALLY-ASSISTED CALIBRATION METHOD APPLICABLE THERETO
    23.
    发明申请
    RF RECEIVER AND DIGITALLY-ASSISTED CALIBRATION METHOD APPLICABLE THERETO 有权
    RF接收器和数字辅助校准方法

    公开(公告)号：US20150303957A1

    公开(公告)日：2015-10-22

    申请号：US14754860

    申请日：2015-06-30

    Applicant: MEDIATEK Inc.

    Inventor： Sheng-Hong Yan ,  Sheng-Hao Chen ,  Paul Cheng Po Liang ,  Jen-Che Tsai

    IPC: H04B1/10 ,  H04B1/12

    CPC classification number: H04B1/1081 ,  H04B1/10 ,  H04B1/123 ,  H04B17/11

    Abstract: A radio frequency (RF) receiver includes a digital tuning engine; and I-path and Q-path analog filters, tuned by the digital tuning engine. The digital tuning engine gets an I/Q imbalance difference, and the digital tuning engines tunes the I-path analog filter and/or the Q-path analog filter based on the I/Q imbalance difference.

    Abstract translation: 射频（RF）接收机包括数字调谐引擎; 以及由数字调谐引擎调谐的I-path和Q-path模拟滤波器。 数字调谐引擎获得I / Q不平衡差异，数字调谐引擎根据I / Q不平衡差调谐I路模拟滤波器和/或Q路径模拟滤波器。

    RF receiver and digitally-assisted calibration method applicable thereto
    24.
    发明授权
    RF receiver and digitally-assisted calibration method applicable thereto 有权
    RF接收机和适用于其的数字辅助校准方法

    公开(公告)号：US09100078B2

    公开(公告)日：2015-08-04

    申请号：US13798241

    申请日：2013-03-13

    Applicant: MEDIATEK Inc.

    Inventor： Sheng-Hong Yan ,  Sheng-Hao Chen ,  Paul Cheng Po Liang ,  Jen-Che Tsai

    IPC: H04B1/10 ,  H04B17/11

    CPC classification number: H04B1/1081 ,  H04B1/10 ,  H04B1/123 ,  H04B17/11

    Abstract: A radio frequency (RF) receiver includes a digital tuning engine; I-path and Q-path analog filters, tuned by the digital tuning engine; and a digital compensation circuit. The digital tuning engine executes a RC (resistor-capacitor) time constant calibration to adjust respective cut-off frequencies of the I-path analog filter and the Q-path analog filter. The digital tuning engine executes a filter mismatch calibration to match the I-path analog filter and the Q-path analog filter. The digital tuning engine executes a filter residual mismatch calibration to match an I-path response from the I-path analog filter to the digital compensation circuit and a Q-path response from the Q-path analog filter to the digital compensation circuit.

    Abstract translation: 射频（RF）接收机包括数字调谐引擎; I路径和Q路径模拟滤波器，由数字调谐引擎调谐; 和数字补偿电路。 数字调谐引擎执行RC（电阻 - 电容）时间常数校准，以调整I路径模拟滤波器和Q路径模拟滤波器的相应截止频率。 数字调谐引擎执行滤波器失配校准，以匹配I路径模拟滤波器和Q路径模拟滤波器。 数字调谐引擎执行滤波器残余失配校准，以匹配从I路径模拟滤波器到数字补偿电路的I路径响应以及从Q路径模拟滤波器到数字补偿电路的Q路径响应。

    METHOD AND APPARATUS FOR CALIBRATING AN ENVELOPE TRACKING SYSTEM
    25.
    发明申请
    METHOD AND APPARATUS FOR CALIBRATING AN ENVELOPE TRACKING SYSTEM 有权
    用于校准信封跟踪系统的方法和装置

    公开(公告)号：US20140187182A1

    公开(公告)日：2014-07-03

    申请号：US13956376

    申请日：2013-08-01

    Applicant: MEDIATEK INC.

    Inventor： Sheng-Hong Yan ,  Paul Cheng Po Liang

    IPC: H03G3/00

    CPC classification number: H03G3/004 ,  H03F1/0216 ,  H03F1/0222 ,  H03F1/3247 ,  H03F3/19 ,  H03F3/245 ,  H03F2200/102 ,  H03F2201/3233 ,  H03G3/3042

    Abstract: A method of calibrating an envelope tracking system for a supply voltage for a power amplifier module within a radio frequency (RF) transmitter of a wireless communication unit is described. The method comprising, within at least one signal processing module of the wireless communication unit, applying a training signal comprising an envelope that varies with time to an input of the RF transmitter, receiving at least an indication of instantaneous output signal values for the power amplifier module in response to the training signal, calculating instantaneous gain values based at least partly on the received output power values, and adjusting a mapping function between an instantaneous envelope of a waveform signal to be amplified by the power amplifier module and the power amplifier module supply voltage to achieve a power amplifier module gain, for example that is monotonically increasing as a function of power amplifier output power.

    Abstract translation: 描述了一种校准用于无线通信单元的射频（RF）发射机内的功率放大器模块的电源电压的包络跟踪系统的方法。 该方法包括在无线通信单元的至少一个信号处理模块内，将包括随时间变化的包络的训练信号施加到RF发射机的输入端，至少接收功率放大器的瞬时输出信号值的指示 模块，响应于训练信号，至少部分地基于所接收的输出功率值来计算瞬时增益值，并且调整要由功率放大器模块放大的波形信号的瞬时包络和功率放大器模块电源之间的映射函数 实现功率放大器模块增益的电压，例如，作为功率放大器输出功率的函数单调递增。

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