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正交幂级数预失真放大器分析

刘辉1;官伯然2

  

  1. (1. 西安电子科技大学 电子工程学院, 陕西 西安 710071;
    2. 杭州电子工业学院 电子信息分院, 浙江 杭州 310037)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-12-20 发布日期:2004-12-20

Analysis of a quadrature power series predistortion amplifier

LIU Hui1;GUAN Bo-ran2

  

  1. (1. School of Electronic Engineering, Xidian Univ., Xi’an 710071, China;
    2. Hangzhou Inst. of Electronic Engineering, Hangzhou 310037, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

摘要: 采用正交幂级数建立放大器非线性带通模型,并用两路正交幂级数预失真器对放大器进行线性化,理论分析和仿真结果表明采用正交幂级数预失真器可以有效地改善放大器的幅度、相位非线性特性.

关键词: 功率放大器, 线性化, 预失真, 正交幂级数

Abstract: Predistortion linearization technology is conceptually the simplest form of linearization for an RF power amplifier. The single power series predistorter can significantly compensate amplitude distortion, but it is limited in phase distortion improvement. This paper presents a bandpass nonlinear amplifier model by using the quadrature power series, and uses two such power series predistorters in a quadrature arrangement to linearize the power amplifier. Analytical and simulation results show that using the quadrature power series predistorter can effectively improve both amplitude and phase distortion.

Key words: power amplifier, linearization, predistortion, quadrature power series

中图分类号: 

  • TN722