一种基带预失真RF功率放大器线性化技术的模型仿真与实验  

A baseband predistorting linearizer for RF power amplifier prototype simulation and experimentation

作　　者：赵洪新[1] 陈忆元[1] 洪伟[1] 

机构地区：[1]东南大学无线电工程系,江苏南京210096

出　　处：《通信学报》2000年第5期41-47,共7页Journal on Communications

摘　　要：提出了一种基于相关函数计算的自适应环路延迟补偿法 ,用于功率放大器的数字式基带预失真线性化技术。对采用这种软件延时补偿方法的预失真系统特性进行了仿真 ,并采用通用的数字信号处理器在硬件上实现了一个功放预失真线性化模型。仿真和实验结果表明 ,在功率放大器的基带预失真技术中采用这种方法可以获得至少 2 0dB的线性度改善。This paper presents a baseband digital predistortion linearizer model which enables linear amplification,correlation method is adopted to estimate propagation delay in the auto adaptation loop for compensation purpose Simulation on PC platform is conducted and a prototype system make use of common digital signal processing (DSP) microprocessor has been constructed Simulation and experimental results indicate that this approach can get at least 20dB improvement on linearity of amplifier

关 键 词：功率放大器 预失真 线性化 模型仿真 RF 

分 类 号：TN722.75[电子电信—电路与系统]