陈中森,巩稼民,张博

• 1:西安邮电大学电子工程学院

摘要(Abstract)：

针对宽带无线通信系统中数字预失真技术反馈回路存在模数转换器ADC的采样速率高、预失真后信号峰均比(PAPR)增大的问题,提出一种结合峰值功率控制的带限数字预失真算法。通过设置阈值门限,对预失真后的信号幅度进行控制以减小其PAPR;运用带通滤波器限制ADC采样带宽并通过频谱外推方法完成对带限输出信号的完整估计,实现ADC采样速率的降低。实验结果表明,该算法不仅能降低系统采样速率,而且能有效提升功放的线性度,相对于传统预失真技术,功放输出信号的邻道功率比改善约5dB。

关键词(KeyWords)： 射频功率放大器;峰值功率控制;频谱外推;带宽限制;数字预失真;最小二乘法

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(61775180);; 陕西省重点研发项目(2017ZDXM-GY-004)~~

作者(Author): 陈中森,巩稼民,张博

DOI: 10.16652/j.issn.1004-373x.2018.05.002

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