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.
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
关键词
数字基带预失真
查找表
非线性
复数增益
digital baseband predistortion
look- up table
nonlinear
complex gain
