@inproceedings{5c4a9bd91d9c4fa4b974de577516a0f8,
title = "Phase-only digital predistortion technique for class-e outphasing power amplifiers",
abstract = "Efficient and linear power amplifiers (PA) are an essential part of forthcoming 5G wireless systems. Outphasing class-E PAs offer high power efficiency and an option for higher efficiency cellular networks. However, they employ signal component separators, which split the signal into two paths. In order to efficiently recombine the signal, nonlinear power combiners are used. This paper proposes a novel phase-only predistortion technique for outphasing class-E PAs. The predistortion coefficients can be extracted based on AMAM characteristics of the output signal and an analytical model of an outphasing Class E PA. The suggested technique has been validated by simulation of an outphasing power amplifier in ADS Ptolemy software. It is shown that applying this technique to a 16QAM OFDM modulated signal with 20 MHz bandwidth improves error vector magnitude (EVM) from 10.39% to 2.43% compared to the signal without predistortion.",
keywords = "Class-E, Nonlinearity, Outphasing amplifier, Power amplifiers, Predistortion",
author = "Pavel Afanasyev and Prasidh Ramabadran and Somayeh Mohammady and Ronan Farrell and John Dooley",
note = "Publisher Copyright: {\textcopyright} 2019 EuMCE.; 2019 European Microwave Conference in Central Europe, EuMCE 2019 ; Conference date: 13-05-2019 Through 15-05-2019",
year = "2019",
month = may,
language = "English",
series = "Proceedings of European Microwave Conference in Central Europe, EuMCE 2019",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "14--17",
editor = "Jan Vrba and Milan Svanda and Ondrej Fiser and David Vrba",
booktitle = "Proceedings of European Microwave Conference in Central Europe, EuMCE 2019",
address = "United States",
}