一种基于频分复用的预失真补偿算法设计与实现  

Design and Implementation of a Predistortion Compensation Algorithm Based on OFDM

作　　者：郭予并[1] 杨建涛[1] 

机构地区：[1]91404部队

出　　处：《计算机与数字工程》2015年第12期2123-2126,共4页Computer & Digital Engineering

摘　　要：频分复用即OFDM。采用OFDM技术的系统中,传输信号对高功率放大器(HPA)的非线性非常敏感,会造成码间干扰和邻道干扰。提出一种并行结构预失真方法,采用多项式和Hammerstein预失真器两个并行模块,分别补偿功放无记忆非线性失真和低阶记忆非线性失真。仿真结果表明,提出的并行结构预失真补偿算法能有效地改善信号非线性失真,实现HPA的线性化。Orthogonal Frequency Division Multiplexing means OFDM.In the system using OFDM technology,the transmission signals are sensitive to the nonlinearity of high power amplifiers（HPA）.The nonlinearity of HPA causes inter symbol interference and adjacent channel interference.A scheme for digital predistortion based on parallel structure is proposed,which containes two parallel module,polynomial and Hammerstein predistorter.The former is to compensate the high order nonlinearity of HPA,while the later is for memorability and low order nonlinearity.Simulation results show that the compensation algorithm can correct the nonlinearity distortion obviously to linearization HPA.

关 键 词：非线性 高功率放大器 预失真 OFDM通信 

分 类 号：TN911[电子电信—通信与信息系统]