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一种用于射频功率放大器自适应控制的RLS算法

吕永生;王家礼;王云飞   

  1. (西安电子科技大学 机电工程学院, 陕西 西安 710071)

  • 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

An adaptive RLS algorithm applied to RF power amplifiers

Lü Yong-sheng;WANG Jia-li;WANG Yun-fei

  

  1. (School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

摘要: 研究了一种用于线性化RF功率放大器的自适应预失真技术,并给出了分析和仿真结果.得出结论为:分析表明功放输出的邻信道功率(ACP)是预失真器系数的二次函数;利用了新的自适应算法即使用预测的ACP曲面以提供更快的收敛速度;仿真结果表明,3阶产物可获得20dB以上的改善,5阶产物可获得10dB以上的改善.

关键词: 功率放大器, 预失真, 数字信号处理, 递归最小均方误差

Abstract: An adaptive predistorter for linearizing RF power amplifiers is studied and analytical and simulation results are presented. Analysis indicates that the adjacent channel power is a quadratic function of predistorter efficients. A new optimization method is given which uses the predicted ACP surface to obtain fast convergence and simulation results show that a 20dB reduction in the third IMD and a 10dB reduction in the quatic IMD are achievable.

Key words: power amplifiers, predistortion, digital signal processing, RLS

中图分类号: 

  • TN911.72