宽带系统中有记忆大功率功放的数字预失真器研究  

Study of the Digital Pre-Distorter for High Power Amplifier with Memory Effects in Wide Band System

作　　者：张福洪[1] 孔庆浩[1] 栾慎吉[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《电子器件》2008年第6期1903-1906,共4页Chinese Journal of Electron Devices

摘　　要：针对高峰均比的宽带输入信号,提出了一套联合峰均比抑制技术和基带自适应预失真技术的数字预失真器设计方案,并仿真了峰值抵消算法和自适应预失真算法。结果表明对于峰均比为8.4 dB的输入信号,经过1.5 dB的削峰处理后,预失真器改善带外频谱抑制27 dB,非常有效地补偿了功放的非线性失真,提高了功放效率,对发射机功放线性化技术有一定的实用价值。Based on the wide band input signal with high peak-to-average power ratios （PAPR）, a digital predistorter scheme that combines PAPR suppression technology with adaptive digital predistortion tech- nology is present. The peak counteraction algorithm and adaptive predistortion algorithm have been ana- lyzed through computer simulation, the results show that the proposed digital predistorter can suppress spectral re-growth 27 dB after 1.5 dB crest factor reduction for input signal with 8. 4 dB PAPR,effectively compensate HPA＇s nonlinear distortion and enhance HPA＇s efficiency. It will be helpful to the utility development of transmitter＇s amplifier linearization.

关 键 词：非线性功放 数字预失真器 峰值抵消算法 自适应预失真 

分 类 号：TN929.5[电子电信—通信与信息系统]