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Joint adaptive bias point adjustment and digital pre-distortion for power amplifier

机译:功率放大器的联合自适应偏置点调整和数字预失真

摘要

One embodiment of the present invention relates to a method and apparatus are provided herein for reducing the power consumption of a transmission chain while maintaining an acceptable figure of merit (e.g., linearity). In one embodiment, an adaptive biasing element is configured to perform adaptive biasing to reduce current consumption of a transmission chain by adjusting the operating point of one or more transmission chain elements (e.g., power amplifier, mixer, etc.). However, since adaptive biasing may reduce the linearity of a transmitted signal, its use is limited by the degradation of figure of merit caused by the introduced non-linearities. Accordingly, a pre-distortion element may be configured to perform adaptive digital pre-distortion (DPD) on a transmission chain input signal to account for non-linearities generated through the adaptive biasing, therefore allowing the adaptive biasing to further reduce the current consumption while maintaining an acceptable figure of merit.
机译:本发明的一个实施例涉及本文提供的一种用于在保持可接受的品质因数(例如,线性度)的同时减少传输链的功率消耗的方法和装置。在一个实施例中,一种自适应偏置元件被配置为执行自适应偏置以通过调节一个或多个传输链元件(例如,功率放大器,混频器等)的工作点来减少传输链的电流消耗。但是,由于自适应偏置可能会降低发射信号的线性度,因此其使用受到引入的非线性导致的品质因数下降的限制。因此,预失真元件可以被配置为对传输链输入信号执行自适应数字预失真(DPD)以解决通过自适应偏置产生的非线性,因此允许自适应偏置进一步减少电流消耗,同时维持可接受的品质因数。

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