基于软件协同仿真的宽带功放预失真模型研究  

Research on Predistortion Model of Broadband Power Amplifier Based on Software Co-simulation

作　　者：刘金亭 Liu Jinting(ChongQing Technology and Business Institute,Electronic Information Engineering,Chongqing 401520,China)

机构地区：[1]重庆工商职业学院电子信息工程学院,重庆401520

出　　处：《科学技术创新》2022年第5期78-81,共4页Scientific and Technological Innovation

基　　金：“2021年重庆开放大学(重庆工商职业学院)科研项目——全数字瓦特级宽带高效LINC发射机关键技术及其集成方法研究,项目编号:NDYB2021-06”。

摘　　要：为解决宽带功放非线性失真问题,将传统Volterra级数模型推广到复数域,并构建一种新的自适应功放行为模型,采用CLMS算法对新建模型进行参数辨识,为验证新模型的特性,搭建了基于ADS2019与MATLAB的软件协同仿真系统,采用双载波WCDMA信号作为测试信号,经预失真器补偿后的ACPR值较功放原始信号及普通记忆多项式模型分别改善了21.896dB和8.124dB。In order to solve the nonlinear distortion problem of broadband power amplifiers, the traditional Volterra series model was extended to the complex domain, and a new adaptive power amplifier behavior model was constructed.The CLMS algorithm was used to identify the parameters of the new model. A software co-simulation system based on ADS2019 and MATLAB is proposed, and the dual-carrier WCDMA signal is used as the test signal. The ACPR value after predistorter compensation is improved by 21.896 dB and 8.124 dB respectively compared with the original signal of the power amplifier and the ordinary memory polynomial model.

关 键 词：功率放大器 非线性 预失真 行为模型 复数域 

分 类 号：TP311.5[自动化与计算机技术—计算机软件与理论]