Comparison of the Behavioral Modelings for RF Power Amplifier With Memory Effects
Comparison of the Behavioral Modelings for RF Power Amplifier With Memory Effects
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DOI：
10.1109/lmwc.2009.2013746
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发表时间：
2009-02
影响因子：
3
通讯作者：
Huadong Wang;J. Bao;Zhengdu Wu
中科院分区：
文献类型：
--
作者：
Huadong Wang;J. Bao;Zhengdu Wu
本文介绍了三种不同的行为模型来分析具有强记忆的功率放大器的性能。其中，将非均匀延迟记忆多项式模型与传统的记忆多项式模型进行比较，用于分析稀疏延迟的影响，并将增强的记忆多项式模型用于评估非线性记忆效应。最后，对一个WiMAX Doherty-structure LDMOS放大器进行了测量，并从放大器的测量输出中提取了三个模型。结果表明，采用非均匀延迟可以大大降低模型复杂度，采用非线性记忆模型可以提高模型精度。
In this letter, three different kinds behavioral models are introduced to analyze the performance of power amplifiers (PAs) with strong memory. Among these models, the non-uniform delay memory polynomial model is compared with the traditional memory polynomial model for analyzing effect of sparse delays, and the enhanced memory polynomial model for evaluating nonlinear memory effect. Finally, a WiMAX Doherty-structure LDMOS PA is measured and three models are extracted from measured output of the PA. The result proves that the model complexity can be greatly reduced with non-uniform delays and the model precision improved with nonlinear memory model.