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    • 2. 发明申请
    • Method for the adaptive pre-distortion of digital raw data values and device for carrying out said method
    • 用于数字原始数据值的自适应预失真的方法和用于执行所述方法的装置
    • US20060008027A1
    • 2006-01-12
    • US10530666
    • 2003-10-02
    • Yingjie GaoRalf KernRolf Theisen
    • Yingjie GaoRalf KernRolf Theisen
    • H04K1/02
    • H03F1/3247H03F1/3258H03F1/34H03F3/24H03F2200/207H03F2201/3233H04B2001/0433
    • A method is provided for the adaptive pre-distortion of digital raw data values for a communication appliance output stage having a power amplifier, the method including the following steps: a) the raw data values (Vm) are pre-distorted by multiplying the raw data values by pre-distortion values from a lookup table (2) containing an association between amplitudes of the raw data values and pre-distortion values; b) output signal values (Vr) of the power amplifier (6) are redirected to an adaptation unit (9); d) temporally corresponding raw data values and output signal values are compared in the adaptation unit in order to assess the distortions of the power amplifier (6); and e) the lookup table (2) is adapted on the basis of results of step d). The present invention seeks to dispense with computing power required to adapt pre-distortion values. To this end, the adaptation unit (9) functions discontinuously and the pre-distortion values of the lookup table (2) are interpolated/extrapolated at least for non-occurring raw data values (Vm). A device is also provided for carrying out the inventive method.
    • 提供了一种用于具有功率放大器的通信设备输出级的数字原始数据值的自适应预失真的方法,该方法包括以下步骤:a)原始数据值(V SUB) 通过将原始数据值乘以来自包含原始数据值的幅度与预失真值之间的关联的查找表(2)的预失真值来预先变形; b)功率放大器(6)的输出信号值(V SUB)重定向到适配单元(9); d)在适配单元中对时间上对应的原始数据值和输出信号值进行比较,以评估功率放大器(6)的失真。 以及e)基于步骤d)的结果来调整查找表(2)。 本发明寻求免除调整预失真值所需的计算能力。 为此,适配单元(9)不连续地起作用,并且至少对于未出现的原始数据值(V SUB m),对查找表(2)的预失真值进行内插/外推。 还提供了用于实施本发明的方法的装置。