TY - GEN
T1 - A Highly-Efficient Amplification Scheme for OFDM Signals
AU - Viegas, Pedro
AU - Guerreiro, João
AU - Dinis, Rui
AU - Montezuma, Paulo
AU - Oliveira, João Pedro
AU - Laires, Ricardo
AU - Morgado, Pedro
AU - Serra, Hugo
AU - Madeira, Ricardo
N1 - Funding Information:
info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50008%2F2020/PT#
1This work was supported by Koala Tech, under the support of P2020 - Pro-jetos Individuais - Internacionalização, (LISBOA-02-0752-FEDER-038713), by Fundação para a Ciência e Tecnologia and Instituto de Telecomunicações under projects PES3N (POCI-01-0145-FEDER-030629) and MASSIVE5G (SAICT-45-2017-02) and by POSITION II, which received funding from the Electronic Component Systems for European Leadership Joint Undertaking (ECSEL-JU) under grant agreement 783132-Position-II-2017-IA.
Publisher Copyright:
© 2021 IEEE.
PY - 2021/4
Y1 - 2021/4
N2 - The need for higher data rates in wireless communications has resulted in a significant effort in what regards to the design of transmission techniques and waveforms. This design can be very challenging thanks to the strong trade-off between the spectral efficiency and the energy efficiency, which comes from the fact that spectral-efficient waveforms usually presents a very large peak-to-average power ratio (PAPR), requiring a linear amplification for preserving the linearity of the transmitted signals. Nevertheless, obtaining spectral- and energy-efficient wireless communications will undoubtedly be one of the main challenges of both 5G and beyond 5G (B5G) systems. In this work, we propose a new amplification scheme named quantized digital amplification (QDA). The QDA is based on the decomposition of a high-PAPR signal into constant-envelope components and allows to obtain very high energy efficiencies, being suitable for spectrally-efficient transmission techniques such as orthogonal frequency-division multiplexing (OFDM). By presenting a set of results of the QDA's prototype, we demonstrate that it is possible to obtain amplification efficiencies way above the ones of the state-of-the art amplification schemes, while preserving the linearity of the transmitted signals. 1
AB - The need for higher data rates in wireless communications has resulted in a significant effort in what regards to the design of transmission techniques and waveforms. This design can be very challenging thanks to the strong trade-off between the spectral efficiency and the energy efficiency, which comes from the fact that spectral-efficient waveforms usually presents a very large peak-to-average power ratio (PAPR), requiring a linear amplification for preserving the linearity of the transmitted signals. Nevertheless, obtaining spectral- and energy-efficient wireless communications will undoubtedly be one of the main challenges of both 5G and beyond 5G (B5G) systems. In this work, we propose a new amplification scheme named quantized digital amplification (QDA). The QDA is based on the decomposition of a high-PAPR signal into constant-envelope components and allows to obtain very high energy efficiencies, being suitable for spectrally-efficient transmission techniques such as orthogonal frequency-division multiplexing (OFDM). By presenting a set of results of the QDA's prototype, we demonstrate that it is possible to obtain amplification efficiencies way above the ones of the state-of-the art amplification schemes, while preserving the linearity of the transmitted signals. 1
KW - Amplification
KW - energy efficiency
KW - Orthogonal frequency division multiplexing (OFDM)
KW - Peak to average power ratio (PAPR)
UR - http://www.scopus.com/inward/record.url?scp=85112410587&partnerID=8YFLogxK
U2 - 10.1109/VTC2021-Spring51267.2021.9449004
DO - 10.1109/VTC2021-Spring51267.2021.9449004
M3 - Conference contribution
AN - SCOPUS:85112410587
SN - 978-172818964-2
T3 - IEEE Vehicular Technology Conference
BT - 2021 IEEE 93rd Vehicular Technology Conference, VTC 2021-Spring - Proceedings
PB - Institute of Electrical and Electronics Engineers (IEEE)
T2 - 93rd IEEE Vehicular Technology Conference, VTC 2021-Spring
Y2 - 25 April 2021 through 28 April 2021
ER -
