基于多项式数字基带自适应预失真技术的研究

Study on the Polynomial Digital Baseb and Adaptave Predistortion

由于自适应数字预失真具有稳定性好、适应能力强等优点,被广泛应用于实现功率放大器的线性化。而本文正是研究了基于多项式数字基带自适应预失真技术。首先,介绍了基于多项式数字基带自适应预失真技术;其次,分析了间接学习结构理论;最后,对OFDM信号进行了仿真实验。结果表明:预失真可以有效地抑制带外频谱以及补偿功放的非线性失真和记忆效应。

Since the adaptive digital pre distortion has good stability, strong adaptability, widely used in liner.This paper is tostudy the technology of digital baseband adaptive predistortion based on polynomial. Firstly, it introduces the technology of digital baseband adaptive predistortion based on polynomial; secondly, the indirect learning architecture theory; finally, simulation experiment iscarried out on the OFDM signal. The results show thatthe predistortion nonlinear distortion can be effectively suppressed the band spectrum and the compensation of amplifier and memory effect.