带记忆效应的射频功放数字基带预失真  

The Study Of Digital Predistortion For Memory Power Amplifier In Wireless Communication System

作　　者：虞强[1] 沈海根[1] 

机构地区：[1]上海交通大学电磁场与微波研究中心,上海200240

出　　处：《微计算机信息》2007年第29期239-241,共3页Control & Automation

摘　　要：在无线通信系统中,射频大功率器是产生非线性失真的主要器件,预失真技术因其成本低廉、自适应能力强、效率高等优势成为最有发展潜力的线性化技术。本文介绍了射频功放的记忆效应及用于识别HPA记忆效应的数字预失真器的结构和特点,提出了基于Wiener模型预失真器的相关算法。通过计算机仿真验证了该算法的有效性以及基于Wiener模型的数字预失真技术能够有效改善记忆功放的线性化,从而提高发射机的整体性能。In the Wireless System, high power amplifier （HPA） is the major source of the nonlinearity distortion. As its lower cost, adaptively and higher efficiency, predistortion is. the main potential method to solve nonlinearity distortion in Wireless System. In this paper, the structures and characters of the memory HPA and its Digital Predistortion（DPD） which can identify HPA with memory effects are introduced, and proposed an effective algorithm based on Wiener DPD model. Then presented the simulation to verify that the application of DPD for power amplifiers in Wireless System can achieve a satisfied result.

关 键 词：数字预失真 大功率放大器 WIENER模型 记忆效应 

分 类 号：TN722.7[电子电信—电路与系统]