A joint linearity-efficiency model of radio frequency power amplifiers
A joint linearity-efficiency model of radio frequency power amplifiers
复制标题
射频功率放大器的联合线性效率模型
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Christian Vogel
中科院分区：
文献类型：
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作者：
H. Enzinger;Karl Freiberger;Christian Vogel
提出了射频功率放大器联合线性效率特性的解析模型。该模型是通过傅立叶级数分析得到的，该分析同时包含由电流裁剪引起的强非线性和由跨导变化引起的弱非线性。通过偏置点的选择，可以对A类、B类、AB类等常用放大器进行建模。对于数值评估，该模型减少到两个查找表，使其非常适合高级系统仿真。在一个应用实例中，我们演示了该模型如何用于模拟特定单载波和多载波调制方案的误差矢量幅度和平均效率。
We present an analytical model of the joint linearity-efficiency behavior of radio frequency power amplifiers. The model is derived by Fourier series analysis of a generic amplifier circuit including both strong nonlinearity due to current-clipping as well as weak nonlinearity due to transconductance variation. By selection of the biasing point, common amplifier classes like class A, class B and class AB can be modeled. For numerical evaluation, the model reduces to two lookup-tables, which makes it well suited for high-level system simulations. In an application example we demonstrate how the model can be used to simulate the error-vector-magnitude and the average efficiency for specific single-carrier and multi-carrier modulation schemes.