基于查找表的基带自适应预校正方法的系统仿真  

Simulation of Baseband Adaptable Predistortion System Based on Look-Up Table

作　　者：樊小明[1] 薛斌[1] 曾志斌[1] 孙象然[1] 

机构地区：[1]中国传媒大学广播电视数字化教育部工程研究中心,北京100024

出　　处：《中国传媒大学学报（自然科学版）》2007年第4期78-82,共5页Journal of Communication University of China：Science and Technology

摘　　要：本文提出了一种高功率放大器的非线性预校正系统设计方案。本系统基于复数增益的查找表,通过射频解调后的基带IQ信号与原始基带IQ信号的比对来更新查找表,从而实现数字基带信号的自适应预失真。M atlab仿真结果表明,本校正方法收敛速度快,校正效果明显,较好地补偿了高功率放大器的幅度失真和相位失真。In this paper, a nonlinear predistortion system for high power amplifier is developed. The system is based on a complex gain Look - Up table to predistort baseband digital signal, and achieves adaptation with feedback signals. Simulation results on Matlab show that the system converges fast and compensates the nonlinear distortion both on magnitude and phase of high power amplifier efficiently.

关 键 词：数字基带预失真 查找表 非线性 复数增益 

分 类 号：TN830.3[电子电信—信息与通信工程]