LUT/Parametric Digital Predistortion Approach for the Linearization of Power Amplifiers Characteristics
LUT/Parametric Digital Predistortion Approach for the Linearization of Power Amplifiers Characteristics
复制标题
用于功率放大器特性线性化的 LUT/参数化数字预失真方法
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Toutain
中科院分区：
文献类型：
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作者：
M. A. Hussein;Yide Wang;G. Peyresoubes;B. Feuvrie;S. Toutain
本文研究了用数字预失真技术实现功率放大器特性的线性化。提出了一种新的无记忆数字预失真器（PD）的实现方法。它包括使用具有对应于基带输入信号的幅度范围的大步长分段的几个条目的查找表。对于每个段，使用低阶映射多项式函数来近似PA的逆AM/AM和AM/PM特性。一个全自动的测试台与市场上的功率放大器一起使用，以评估这种方法。
This paper deals with the linearization of power amplifier characteristics by digital predistortion technique. A new approach for the implementation of the memoryless digital predistorter (PD) is proposed. It consists on using a look-up-table with few entries corresponding to large step segmentation of the amplitude range of the baseband input signal. For every segment, a low order mapping polynomial function was used to approximate the inverse AM/AM and AM/PM characteristics of the PA. A fully automatic test bench is used with a power amplifier from the market to evaluate this approach.