一种新的基于反馈的数字预失真器模型（英文）  

Polynomial Model with Feedback for Digital Predistortion of Power Amplifiers

作　　者：赵霞[1] 李瞻宁 

机构地区：[1]同济大学电子与信息工程学院,上海201804

出　　处：《北京邮电大学学报》2017年第5期75-81,共7页Journal of Beijing University of Posts and Telecommunications

摘　　要：数字预失真器是线性化功率放大器的有效工具.记忆多项式等模型难以兼顾模型的精确性和复杂程度.为解决该问题,提出了一种基于反馈的多项式模型建模数字预失真器.不仅使用输入信息,还使用过去时刻的输出信息,用较少的系数个数对高非线性及深记忆效应的功率放大器建立模型.仿真结果显示,该模型比一些常见的模型可更有效地缓解功率放大器的幅值和相位失真.The digital predistortion is a cost-effective way to the linearize power amplifiers. Memory polynomial is one of the most popular DPD models. However,these models cannot get a good compromise between accuracy and complexity. The author proposes a feedback-based model to characterize DPD. The model not only uses the input information,but also uses the past output information. Simulations show that the model can linearize the magnitude and phase nonlinearity of power amplifiers more effectively.

关 键 词：功率放大器 记忆多项式 数字预失真器 信号处理 

分 类 号：TN911.72[电子电信—通信与信息系统]