Experimental Proof of Concept Applying Digital Predistortion to Radio Frequency Power Amplifiers

被引：1

作者：

Montanez Sogamoso, Oscar Javier ^{[1
]}

Avendano Fernandez, Eduardo ^{[1
]}

机构：

[1] Univ Pedag & Tecnol Colombia, Escuela Ingn Elect, Sogamoso, Colombia

来源：

2021 IEEE COLOMBIAN CONFERENCE ON COMMUNICATIONS AND COMPUTING (COLCOM) | 2021年

关键词：

Saleh Model; digital predistortion; ACPR; GNURadio; USRP; MODELS;

D O I：

10.1109/COLCOM52710.2021.9486303

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The non-linear behavior of amplifiers of power in wireless communications systems, introduces a lateral spectral growth that compromises efficiency in power and spectral. This article presents a numerical validation and experimental implementation of digital predistortion system to mitigate the adjacent channel power ratio (ACPR) impact of power amplifier applications in the 0.9 GHz band with power gains of up to 14 dB. Applying the Saleh model from the curves of amplitude-modulation (AM) and phase-modulation (PM), and modelling the inverse transfer function in an implementation under GNU Radio environment, it was possible to provide a mitigation of the ACPR. The experimental result allows to make a proof-of-concept of digital predistortion showing a reduction in ACPR of 8 dB for a baseband wireless transmission system using N210 USRP modules and transmitting in base band using QPSK modulation format at 100 kS/s.

引用

页数：5

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