Study on double loop analog predistorter used in 3G RF power amplifiers

Zhang Xue~1; Wang Feng~2

doi:10.13756/j.gtxyj.2007.01.022

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Study on double loop analog predistorter used in 3G RF power amplifiers

- Study on double loop analog predistorter used in 3G RF power amplifiers
- Study on Optical communication Issue 1, Pages: 67-70(2007)
- 作者机构：
  
  1. 武汉邮电科学研究院
  2. 武汉虹信通信技术有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2007.01.022
  CLC： TN722.75
- Published：2007，
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[1]张雪,王峰.双环路模拟预失真器在3G功放中的研究[J].光通信研究,2007(01):67-70.

Zhang Xue~1, Wang Feng~2. Study on double loop analog predistorter used in 3G RF power amplifiers. [J]. (1):67-70(2007)
[1]张雪,王峰.双环路模拟预失真器在3G功放中的研究[J].光通信研究,2007(01):67-70. DOI： 10.13756/j.gtxyj.2007.01.022.

Zhang Xue~1, Wang Feng~2. Study on double loop analog predistorter used in 3G RF power amplifiers. [J]. (1):67-70(2007) DOI： 10.13756/j.gtxyj.2007.01.022.

摘要

预失真是目前3G功放中的主流线性化技术之一。文章介绍了一种双环路模拟预失真方案

从理论和实践上进行了推理与验证

分析了目前实验电路存在的问题

并提出了改进的措施。实验结果表明

该方案能使某3G功放的三阶互调失真比（IMD3）改善20 dB

对宽带码分多址（WCDMA）信号的邻道功率泄漏比（ACLR）改善近5 dB

可基本满足指标的要求。

Abstract

Predistortion is one of the main linearization techniques used in 3G power amplifiers（PA） at present.In this paper

a double loop analog predistorter scheme is introduced

its theoretical and practical inference and verification conducted

problems in current experimental circuits analyzed and the possible remedies presented.The testing results show that for a 3G PA

IMD3 improvement is over 20dB and ACLR improvement using WCDMA signals is nearly 5dB

which basically fulfills the specification requirements.

关键词

预失真功率放大器线性化双环控制相位失真

Keywords

predistortionpower amplifierlinearizationdouble loop controlledPM distortion

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