OFDM系统中的自适应预失真研究

Study on Adaptive Predictor in OFDM System

随着移动通信中线性调制方法的出现,功率放大器的线性化成为一个重要的研究课题。提出一种用于正交频分复用(OFDM)系统中补偿由功率放大器引起的非线性失真的自适应预失真方法,并基于RASCAL算法,给出数字预失真器在OFDM中的实现结构,仿真表明该算法具有收敛速度快、补偿效果好的特点。

Linearization of power amplifiers has been become an important issue with the advent of linear modulation methods in mobile communication. This paper puts forward a method for an adaptive predictor method to compensate distortion by a high-power amplifiers in OFDM. This paper presents the structure of adaptive digital predictor based on RASCAL algorithm in the OFDM system. It is confirmed by a computer simulation that the algorithm converges is fast and a good effective compensation.