基于坐标变换的射频功放预失真参数估计方法

黄浩; 钱骅; 姚赛杰; 杨秀梅

doi:10.11959/j.issn.1000-436x.2015009

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基于坐标变换的射频功放预失真参数估计方法

学术论文 | 更新时间：2024-06-05

- 基于坐标变换的射频功放预失真参数估计方法
- Coordinate transformation based coefficients estimation algorithm for digital predistortion of RF power amplifiers
- 通信学报 2015年36卷第1期页码：75-83
- 作者机构：
  
  1. 中国科学院上海微系统与信息技术研究所，上海 200050
  2. 上海无线通信研究中心，上海 200335
  3. 中国科学院无线传感网与通信重点实验室，上海 200335
- 作者简介：
  
  [ "黄浩（1988-），男，湖北天门人，中国科学院上海微系统与信息技术研究所博士生，主要研究方向为高功率射频功放自适应预失真技术、非线性系统建模、低功耗无线收发信机架构设计等。" ]
  [ "钱骅（1976-），男，江苏武进人，中国科学院上海微系统与信息技术研究所研究员、博士生导师，主要研究方向为无线通信物理层算法与系统设计、非线性信号处理、无线传感网、车联网等。" ]
  [ "姚赛杰（1988-），男，江苏启东人，中国科学院上海微系统与信息技术研究所博士生，主要研究方向为射频功放自适应数字预失真技术等。" ]
  [ "杨秀梅（1979-），女，山东潍坊人，中科院上海微系统与信息技术研究所副研究员，主要研究方向为无线通信基带信号处理与系统设计、多天线与干扰对齐、异构小小区网络等。" ]
- 基金信息：
  
  中国科学院“百人计划”基金资助项目，国家科技重大专项基金资助项目(2012ZX03001029-004);科技部国际科技合作基金资助项目(2012DFG12060);上海市科技创新行动计划基金资助项目(12511503400)
- DOI：10.11959/j.issn.1000-436x.2015009
  中图分类号： TN919
- 网络出版日期：2015-01，
  
  纸质出版日期：2015-01-25
- 稿件说明：
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黄浩, 钱骅, 姚赛杰, 等. 基于坐标变换的射频功放预失真参数估计方法[J]. 通信学报, 2015,36(1):75-83.

GHao HUAN, Hua QIAN, Sai-jie YAO, et al. Coordinate transformation based coefficients estimation algorithm for digital predistortion of RF power amplifiers[J]. Journal on communications, 2015, 36(1): 75-83.
黄浩, 钱骅, 姚赛杰, 等. 基于坐标变换的射频功放预失真参数估计方法[J]. 通信学报, 2015,36(1):75-83. DOI： 10.11959/j.issn.1000-436x.2015009.

GHao HUAN, Hua QIAN, Sai-jie YAO, et al. Coordinate transformation based coefficients estimation algorithm for digital predistortion of RF power amplifiers[J]. Journal on communications, 2015, 36(1): 75-83. DOI： 10.11959/j.issn.1000-436x.2015009.

摘要

在低中频预失真器构架的基础上，提出了一种基于坐标变换的预失真参数估计方法，从而降低了传统数字基带预失真系统的硬件成本和数值计算量。算法将传统算法中的复数乘法转换为极坐标中的幅度乘法和相位加法，使同样的计算步骤所消耗的乘法和加法次数分别降低了75%和50%。所提算法由通用的通带Volterra非线性模型进行推导得出，证明了预失真处理算法中基带信号和低中频信号的等同适用性。对实际射频功放的测试实验结果验证了其有效性。

Abstract

Based on the low-IF digital predistortion (DPD) architecture

a coordinate transformation based low-complex coefficients estimation algorithm is proposed to reduce the hardware implementation cost and numerical calculation complexity significantly.The proposed algorithm transforms the complex multiplication of the conventional DPD coefficients estimation method to amplitude multiplication and phase addition in polar coordinates.To complete the same calculation

times of multiplications and accumulations are reduced by 75% and 50%.The algorithm is derived from the general Volterra pass-band nonlinear model

and proves the equivalency of baseband predistortion and IF predistortion.The proposed low-IF architecture and the coefficients estimation algorithm are verified by the measurement results on a practical radio frequency power amplifier.

关键词

Keywords

references

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