有记忆功率放大器的辨识

石油化工高等学校学报 ›› 2008, Vol. 21 ›› Issue (3): 88-91.

有记忆功率放大器的辨识

丁元明¹, 沈清波²

1.大连大学信息工程学院,辽宁大连116622; 2.辽宁石油化工大学信息与控制工程学院,辽宁抚顺113001

收稿日期:2007-12-16 出版日期:2008-09-20 发布日期:2017-06-28
作者简介:丁元明(1967-),男,辽宁大连市,副教授,博士
基金资助:
辽宁省智能信息处理重点实验室开放课题(200702)

Identification for High Power Amplifiers With Memory

DING Yuan-ming¹, SHEN Qing-bo²

1. School of Information Engineering,Dalian University, Dalian Liaoning 116622, P.R. China;  2. School of Information and Control Engineering, Liaoning University of Petroleum & Chemical Technology, Fushun Liaoning 113001, P.R.China

Received:2007-12-16 Published:2008-09-20 Online:2017-06-28

摘要/Abstract

摘要： 为了估计正交频分复用(OFDM)通信系统里有记忆高功率放大器(HPA)的特性,给出一种在线辨识
方法。应用基带里的复数Wiener-Hammerstein模型(WHM)描述未知HPA 的输入输出关系,并用一个有记忆的
幂级数模型(PSMWM)去近似这个HPA,进而通过赤池情报量准则(AIC)来确定有记忆幂级数模型的阶数,应用递
推最小二乘法在线估计HPA特性的参数。并用数字仿真实例证明了所给出的辨识方法是有效的,并具有快速收敛
特性。

关键词: 高功率放大器 , Wiener-Hammerstein模型 , 辨识 , 正交频分复用

Abstract: An adaptive identification method was proposed to estimate for the characteristics of high power amplifiers (HPA) with memory in orthogonal frequency division multiplexing (OFDM) communication systems. The complex Wiener-Hammerstein model (WHM) was adopted to describe the input-output relationship of unknown HPA and a power series model with memory (PSMWM) was used to approximate the HPA expressed by WHM in base-band. Furthermore，the orders of PSMWM were chosen by Akaikes information criterion (AIC), and the RLS algorithm was used to estimate parameters of HPA in on-line manner. Finally，the effectiveness and fast convergence of the proposed identification method are validated by numerical simulation example.

Key words: High power amplifier , Wiener-Hammerstein model , Identification , OFDM

丁元明, 沈清波. 有记忆功率放大器的辨识[J]. 石油化工高等学校学报, 2008, 21(3): 88-91.

DING Yuan-ming, SHEN Qing-bo. Identification for High Power Amplifiers With Memory[J]. Journal of Petrochemical Universities, 2008, 21(3): 88-91.