DOI码：10.1109/LMWT.2025.3592118

所属单位：国防科技大学电子对抗学院，中国科学技术大学信息学院

发表刊物：IEEE Microwave and Wireless Technology Letters (Online)

项目来源：NSFC 62371436, 62171450, 62201602

关键字：Broadband transmission, digital predistortion (DPD), power amplifiers (PAs), sampling rate reduction.

摘要：Low-rate digital predistortion (DPD) significantly reduces running power consumption and deployment cost, but the aliasing effect degrades the linearization performance for power amplifiers (PAs). In this letter, we propose a novel bidirectional DPD model that augments the baseline model with a few noncausal terms to reduce the aliasing effect caused by baseband rate reduction. The proposed model is derived from band-limited (BL) DPD but avoids the high-rate filtering of the basis functions through implicit filtering. To validate the proposed model, we conducted experiments on a GaN-based Doherty PA driven by 100/200 -MHz modulated signals. Experimental results show that the proposed model achieves satisfactory linearization performance with a sampling rate of 1.5× signal bandwidth. In addition, the proposed method significantly reduces the number of coefficients compared with the state-of-the-art method.

第一作者：Chengye Jiang

合写作者：Junning Zhang

论文类型：期刊论文

通讯作者：Falin Liu,Bo Tang

论文编号：10.1109/LMWT.2025.3592118

学科门类：工学

文献类型：J

卷号：Online

期号：Online

页面范围：1-4

是否译文：否

发表时间：2025-07-31