一种记忆功率放大器自适应线性化仿真  

A Simulation of the Adaptive Linearization of Memory High Power Amplifier

作　　者：董元[1,2] 王勇[2] 易克初[2] 

机构地区：[1]西安邮电学院计算机系,陕西西安710121 [2]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《计算机技术与发展》2010年第6期217-220,224,共5页Computer Technology and Development

基　　金：国家自然科学基金项目(60572148)

摘　　要：为了更好地实现有记忆功率放大器高效率而又高线性的工作,对两种常用的描述功率放大器的记忆效应和非线性特征的模型——W-H模型和记忆多项式模型进行了自适应线性化仿真,采用AM/AM和AM/PM失真特性对由于功放特性不理想而引起的放大信号的振幅畸变及相位偏移进行描述,运用自适应预失真处理方法,进行记忆预失真的模拟,并用误差矢量值(EVM)衡量这种自适应预失真方法的效果。仿真结果表明,文中的自适应预失真方法对上述两种记忆功放模型具有较好的线性化效果。In order to achieve efficiency and linearization of memory high power amplifier,adopts adaptive linearization simulation of two kinds of frequently-used models＇ memory and nonlinearities of power amplifiers,W-H model and memory polynomial model.It describes amplitude aberration and phase deviation of amplified signal due to no good memory high power amplifier by means of distortion of AM/AM and AM/PM.It uses adaptive predistorter to simulate pre-distortion of memory,and to measure that effect by use of error vector magnitude（EVM）.The results of simulation show that the adaptive predistorter has a good linearization effect of above two kinds of memory high power amplifiers.

关 键 词：功率放大器 记忆效应 非线性 自适应预失真 误差矢量值 

分 类 号：TN911.7[电子电信—通信与信息系统]