Linear amplification with multiple amplifiers and antennas

Rui Dinis, Paulo Montezuma, Pedro Bento, Marco Gomes, Vitor Silva

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An efficient power amplification is critical for wireless communications, especially for broadband communications. However, this is difficult when spectrally efficient modulations based on large constellations are employed since the resulting signals have high envelope fluctuations, which means that linear power amplifiers with high back-off need to be employed. Since spectrally efficient constellations have higher power requirements, it is desirable to have power-efficient transmitters for those constellations. In this paper we propose a highly power-efficient transmitter structure for spectrally efficient modulations with large constellations. Our structure is based on the decomposition of the intended constellation in the sum of several polar components, each one modulating a different constant-envelope signal. These constant-envelope signals are then separately amplified by, low-cost, power efficient strongly nonlinear amplifiers, and the output of each amplifier is sent to a separate antenna so as to avoid combiner losses and/or linearity requirements.

Original languageEnglish
Title of host publicationProceedings of the 35th IASTED International Conference on Modelling, Identification and Control, MIC 2016
PublisherACTA Press
Pages153-157
Number of pages5
Volume830
ISBN (Electronic)978-088986979-0
DOIs
Publication statusPublished - 1 Jan 2016
Event35th IASTED International Conference on Modelling, Identification and Control, MIC 2016 - Innsbruck, Austria
Duration: 15 Feb 201616 Feb 2016

Conference

Conference35th IASTED International Conference on Modelling, Identification and Control, MIC 2016
CountryAustria
CityInnsbruck
Period15/02/1616/02/16

Keywords

  • Linear Amplification
  • Multi-Antenna Systems.
  • Power Amplification
  • Saturated Amplifiers

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