功放数字预失真技术现状及未来发展  

Status Quo and Future Development of Power Amplifier Digital Predistortion Technology

作　　者：谷林海 葛利嘉[2] 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065 [2]重庆通信学院应急通信重庆市重点实验室,重庆400035

出　　处：《通信技术》2015年第11期1207-1212,共6页Communications Technology

基　　金：国家自然科学基金资助项目(No.61271251)~~

摘　　要：功放是无线通信发射机的重要组成部分,随着无线通信的不断发展,对宽带线性功放的要求也越来越高。然而,功放的非线性特性和记忆效应会导致信号严重失真。为了减小带内失真和邻道干扰,数字预失真成为功放线性化技术中最有发展潜力的技术。介绍了功放模型,数字预失真的学习结构、数字预失真器参数的辨识算法等研究现状,探讨了数字预失真的发展趋势,为今后数字预失真技术的研究提供参考。AS power amplifier is an important part of wireless communication transmitter, and with the sus- tainable development of wireless communication, the demand for broadband linear amplifier becomes in- creasingly high. However, nonlinear characteristic and memory effect of power amplifier would inevitably lead to serious distortion of the signal. For reduction of in-band distortion and ACI （ Adjacent Channel In- terference）, digital predistortion becomes the most potential development technology in power amplifier lin- earization technology. The status of current amplifier model, learning structure and identification algorithms of digital predistortion parameter are discussed, and the development trend of digital predistortion is ex- plored, and all these could serve as a reference for future digital predistortion research.

关 键 词：功率放大器 线性化 数字预失真 自适应算法 

分 类 号：TN92[电子电信—通信与信息系统] TN722.7[电子电信—信息与通信工程]