A Novel Highly-efficient Amplification Scheme for Satellite Communications

Pedro Viegas, João Guerreiro, Hugo Serra, Ricardo Madeira, Pedro Morgado, Ricardo Laires, Rui Dinis, Paulo Montezuma, João Pedro Oliveira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

It is widely known that satellite communications require highly-efficient transmission structures. This is even more important in the forward link, since the available power at the transponders is limited. For that purpose, having a highly-efficient amplification scheme is critical. However, since the spectral-efficient transmission techniques (e.g. single-carrier modulations with large constellations or multicarrier modulations) present a large peak-to-average power ratio (PAPR), high amplification efficiency is very difficult to obtain. In fact, a linear amplification of such techniques requires high back-offs, which significantly degrades the amplification efficiency. In this work, a novel amplification scheme based on the use of multiple parallel highly-efficient power amplifiers (PAs) is presented, which is suitable for satellite communications. This amplification scheme is based on the decomposition of a high-PAPR signal into a set of constant-envelope components that are individually amplifying and efficiently combined. As it is demonstrated with a set of performance results of a QDA prototype operating with multicarrier signals, the proposed amplification scheme presents a large amplification efficiency, while preserving the linearity of the transmitted signals.1

Original languageEnglish
Title of host publication2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728194417
DOIs
Publication statusPublished - Jun 2021
Event2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Virtual, Online
Duration: 14 Jun 202123 Jun 2021

Publication series

Name2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.

Conference

Conference2021 IEEE International Conference on Communications Workshops, ICC Workshops 2021
CityVirtual, Online
Period14/06/2123/06/21

Keywords

  • amplification
  • energy efficiency
  • peak-to-average power ratio
  • Satellite communications

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