双分支Hammerstein-Wiener射频功放行为建模及预失真  

A Dual-Branch Hammerstein-Wiener Architecture for Behavior Modeling and Pre-Distortion of RF Power Amplifier

作　　者：曲昀[1] 南敬昌[1] 毛陆虹[2] 张智栋[1] 王鑫[1] 

机构地区：[1]辽宁工程技术大学电子与信息工程学院,辽宁葫芦岛125105 [2]天津大学电子信息工程学院,天津300072

出　　处：《微电子学》2013年第4期545-549,共5页Microelectronics

基　　金：国家自然科学基金资助项目(60971048);国家科技重大专项资助项目(2010ZX03007-002-03)

摘　　要：提出一种新的双分支Hammerstein-Wiener模型,对功放进行非线性行为建模及数字预失真研究。利用飞思卡尔半导体公司的MRF7S21170晶体管进行功放电路设计,从ADS中导出输入输出数据进行模型验证和预失真分析。仿真结果表明,该模型性能优于Hammerstein,Wiener和记忆多项式模型,具有较高的精度,能够精确模拟功率放大器的特性,经过数字预失真后,能抑制功放非线性引起的带内失真和频谱再生,对功放线性化技术的发展具有重要的应用价值。A new dual-branch Hammerstein-Wiener model was established for nonlinear behavioral modeling and digital pre-distortion of power amplifier （PA）. Model validation and digital pre-distortion analysis were made by using input and output data extracted from MRF7S21170 transistor model of Freescale Semiconductor, and a PA circuit was designed in ADS circumstance. Results showed that the proposed model had better performance than Hammerstein, Wiener and memory polynomial model, and it could simulate characteristics of PA with high precision. It can also suppress the in-band distortion and spectrum regeneration due to nonlinearity of PA in simulation of digital pre-distortion, and therefore it is of great value for development of PA linearization techniques.

关 键 词：功率放大器 行为模型 HAMMERSTEIN-WIENER模型 非线性 预失真 

分 类 号：TN722.7[电子电信—电路与系统]