DOI码：10.1002/mmce.20783

发表刊物：Int'l Journal of RF and Microwave Computer-Aided Engineering

关键字：digital predistortion; generalized least squares; model extraction; power amplifier.

摘要：Bandwidth constraints pose significant challenges to linearization of wideband RF power amplifiers (PAs) with digital predistortion (DPD). A recently proposed band-limited DPD scheme uses a band-limited modeling technique to eliminate the bandwidth constraints and reduce DPD implementation cost. However, time consuming convolution operations are involved for model extraction in this time domain data based band-limited modeling method. In this article, band-limited model extraction is formulated as a generalized least squares problem and investigated from a frequency domain perspective. A frequency domain data based model extraction method is proposed, which greatly reduces the computational complexity for extracting band-limited DPD model parameters. A 10 W GaN HEMT inverse class-F PA excited by a 20 MHz four-carrier WCDMA signal and a 40 MHz two-carrier LTE signal is tested to validate the method. Experimental results show that the computationally efficient frequency domain data based model extraction method for band-limited DPD provides as good linearization performance as the time domain data based method.

合写作者：Caihong Zhao,Zhenyang Wang,Lingli Li,Haoyu Wang

第一作者：Guang Yang (杨光)

论文类型：期刊论文

通讯作者：Falin Liu

学科门类：工学

文献类型：J

卷号：24

期号：3

页面范围：412-420

是否译文：否

发表时间：2014-05-01

收录刊物：SCI、EI