射频功率放大器自适应预失真的一种改进算法

Improved algorithm for adaptive predistortion of RF power amplifiers

自适应算法是射频功率放大器线性化关键技术之一,本文针对适用于自适应预失真的逐次迭代算法提出了改进。通过计算机仿真证明本文提出的新算法比传统的迭代算法更有优势,除了同样可以改善射频功率放大器的非线性指标、降低信号的邻道抑制比之外,新算法还使得信号的幅度误差在迭代过程中大大降低。

The adaptive algorithm is one of the key research subjects of RF power amplifiers linearization technologies, an improved algorithm based on the successive substitution method for adaptive predistortion is proposed in this article. The simulation results prove that this new algorithm has more advantages compared to the traditional one. The new algorithm reduces not only the adjacent channel power rejection (ACPR), but also the error amplitude (AE) of signal greatly.