Power efficiency model for MIMO transmitters including memory polynomial digital predistortion

Joep Zanen*, Eric Klumperink, Bram Nauta

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Multiple-input multiple-output (MIMO) beamforming array gain can make multi-antenna transmitters (TXs) more power efficient. However, these MIMO TXs require more complex digital predistortion (DPD). In this work, analytical expressions are derived for the power consumption of both MIMO power amplifier (PA) arrays and their respective DPD, taking into account the effects of precoding on PA output power and peak-toaverage power ratio (PAPR). It is shown that for complex DPD algorithms such as cross-over DPD (CO-DPD) in combination with wide bandwidths, the overall DPD power consumption can exceed the overall PA power consumption already for TXs for scenarios with more than two antennas.
Original languageEnglish
Number of pages5
JournalIEEE transactions on circuits and systems II: express briefs
Early online date2 Oct 2020
DOIs
Publication statusE-pub ahead of print/First online - 2 Oct 2020

Keywords

  • Digital predistortion
  • MIMO
  • Transmitter
  • Power amplifier
  • Digital signal processing
  • Efficiency
  • Power consumption

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