基于极坐标的自适应数字预失真器

李林,艳鹏

西南师范大学学报(自然科学版)

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
	姓名不能为空！
邮箱
	邮箱不能为空！非法的邮箱地址。
手机号码
	电话不能为空！请输入有效手机号!
标题
	标题不能为空！
留言内容
	内容不能为空！
验证码
	验证码不能为空！验证码错误！

基于极坐标的自适应数字预失真器

李林,艳鹏. 基于极坐标的自适应数字预失真器[J]. 西南师范大学学报(自然科学版), 2015, 40(8).

引用本文:

李林,艳鹏. 基于极坐标的自适应数字预失真器[J]. 西南师范大学学报(自然科学版), 2015, 40(8).

LI Lin,YAN Peng. On Adaptive Digital Pre-distortion Device Based On Polar Coordinates[J]. Journal of Southwest China Normal University(Natural Science Edition), 2015, 40(8).

Citation:

LI Lin,YAN Peng. On Adaptive Digital Pre-distortion Device Based On Polar Coordinates[J]. Journal of Southwest China Normal University(Natural Science Edition), 2015, 40(8).

基于极坐标的自适应数字预失真器

李林,艳鹏

重庆电子工程职业学院,重庆401331; 重庆大学通信工程学院,重庆400044 河南信息统计职业学院,郑州,450000

On Adaptive Digital Pre-distortion Device Based On Polar Coordinates

LI Lin,YAN Peng

摘要: 基于极坐标方式，以Taylor级数拟合预失真器的AM／AM和AM／PM特性曲线，输入信号幅度作为索引信号创建幅度与相位并联的两张查找表，运用最小均方自适应算法更新表项系数来补偿功放的非线性，设计了自适应数字预失真器。通过Matlab搭建了基于16 QAM调制解调的自适应数字预失真系统。仿真结果表明，邻近通道功率比降低近20 dB ，功放的线性度得到了明显改善。
- 极坐标 /
- Taylor级数 /
- 查找表 /
- Saleh模型 /
- 邻近通道功率比
Abstract: Taylor series is used to fit the AM/AM and AM/PM characteristic curves of the pre‐distortion device .Two look‐up tables (amplitude table and phase table) are created by means of the amplitude of the input signal in polar coordinates .T he nonlinearity of the pow er amplifier is compensated by updating the coefficients of the table through least mean square adaptive algorithm .According to the method mentioned above ,An adaptive digital pre‐distortion system based on 16‐QAM modulation and demodulation is built through the Matlab software .The simulation results show that adjacent channel power ratio (ACPR) is reduced about 20dB .The linearity of power amplifier is significantly improved .
- polar coordinates，taylor series，look-up table，saleh model，adjacent channel power ratio /

计量

文章访问数: 489
HTML全文浏览数: 212
PDF下载数: 0
施引文献: 0

基于极坐标的自适应数字预失真器

李林,艳鹏

重庆电子工程职业学院,重庆401331; 重庆大学通信工程学院,重庆400044 河南信息统计职业学院,郑州,450000

关键词:

摘要: 基于极坐标方式，以Taylor级数拟合预失真器的AM／AM和AM／PM特性曲线，输入信号幅度作为索引信号创建幅度与相位并联的两张查找表，运用最小均方自适应算法更新表项系数来补偿功放的非线性，设计了自适应数字预失真器。通过Matlab搭建了基于16 QAM调制解调的自适应数字预失真系统。仿真结果表明，邻近通道功率比降低近20 dB ，功放的线性度得到了明显改善。

English Abstract

On Adaptive Digital Pre-distortion Device Based On Polar Coordinates

重庆电子工程职业学院,重庆401331; 重庆大学通信工程学院,重庆400044 河南信息统计职业学院,郑州,450000

Keywords:

Abstract: Taylor series is used to fit the AM/AM and AM/PM characteristic curves of the pre‐distortion device .Two look‐up tables (amplitude table and phase table) are created by means of the amplitude of the input signal in polar coordinates .T he nonlinearity of the pow er amplifier is compensated by updating the coefficients of the table through least mean square adaptive algorithm .According to the method mentioned above ,An adaptive digital pre‐distortion system based on 16‐QAM modulation and demodulation is built through the Matlab software .The simulation results show that adjacent channel power ratio (ACPR) is reduced about 20dB .The linearity of power amplifier is significantly improved .