摘要
系统地比较和分析了OFDM传输系统里高功率放大器(HPA)预失真方法的优缺点,提出一种基于模块化模型的有记忆高功率放大器自适应数字预失真方法,该方法分别基于Wiener、Hammerstein和Wiener-Hammerstein模型各自构成一个有记忆HPA的自适应预失真器。从而避免了因分别估计Wiener-Hammerstein模型各个环节特性参数所带来的复杂性。使得有记忆高功率放大器的预失真设计变得简单了。
The advantages and disadvantages of the previous predistortion methods for high power amplifiers （HPA） in orthogonal frequency division multiplexing （OFDM） transmitter were compared and summarized systematically.Block-oriented model-based adaptive digital predistortion technique was presented to compensate for the distortions in HPA with memory.The proposed predistortion schemes were explained,where the adaptive predistorters of HPA with memory were constructed based on Wiener model,Hammerstein model and Wiener-Hammerstein model,respectively.Thus,the complexity of the model parameters of all aspects of Wiener-Hammerstein estimated is avoided,separately.This makes the predistortion design of a high power amplifier with memory became simple.
出处
《辽宁石油化工大学学报》
CAS
2010年第2期53-57,共5页
Journal of Liaoning Petrochemical University
关键词
高功率放大器
自适应预失真
模块化模型
系统辨识
High power amplifiers
Adaptive predistortion
Block-oriented model
System identification
