Combining info and spatial directivities in multiple antenna transmission systems

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

3 Citations (Scopus)

Abstract

It is well known that Massive MIMO systems (Multiple-input multiple-output) have high potential for future wireless broadband systems. However, high spectral and power efficiency requirements can be only achieved by multilevel modulations and efficient power amplification. This seems contradictory, due envelope variation of multilevel constellations that can compromise efficiency of power amplification. These restrictions can be overpassed by a multi-amplifier/antenna transmitter compatible with efficient and low cost saturated nonlinear amplifiers combined with a frequency-domain receiver for broadband millimeter wave systems. Based on this multi-amplifier structure it is possible to define a double layered structure where each amplification branch is connected to an antenna array to achieve both constellation and power directivities, assuring at same time similar performances to systems using transmitters with 2-dimensional antenna arrays.

Original languageEnglish
Title of host publicationProceedings - 2017 International Young Engineers Forum, YEF-ECE 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-5
Number of pages5
ISBN (Electronic)9781509046393
DOIs
Publication statusPublished - 2017
Event2017 International Young Engineers Forum, YEF-ECE 2017 - Caparica, Portugal
Duration: 5 May 2017 → …

Conference

Conference2017 International Young Engineers Forum, YEF-ECE 2017
CountryPortugal
CityCaparica
Period5/05/17 → …

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Keywords

  • Massive MIMO systems
  • multilevel constellations
  • nonlinear amplifiers
  • power amplification

Cite this

Ferreira, A., Gaspar, G., Montezuma, P., & Dinis, R. (2017). Combining info and spatial directivities in multiple antenna transmission systems. In Proceedings - 2017 International Young Engineers Forum, YEF-ECE 2017 (pp. 1-5). [7935631] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/YEF-ECE.2017.7935631