Efficiency enhancement of M2M communications over LTE using adaptive load pull techniques

James Birchall, Paolo Enrico De Falco, Kevin Morris, Mark Beach

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)
307 Downloads (Pure)


Long Term Evolution (LTE) communications systems are increasingly used for remote applications where a battery life of at least ten years is often required. Numerous technologies have been proposed to increase the efficiency of this standard, particularly the power amplifier, however these tend to involve resource intensive signal processing, together with a higher component count. This paper presents the use of a low speed load pull technique, with and without a dynamic power supply system in order to optimise performance. This system was tested with LTE signals and appropriate hardware, providing up to 44% increase in power-added efficiency for the fixed supply voltage case and a 27% increase over basic dynamic power supply architectures whilst maintaining ACLR and EVM performance.
Original languageEnglish
Title of host publication2017 IEEE Radio and Wireless Symposium (RWS 2017)
Subtitle of host publicationProceedings of a meeting held 15-18 January 2017, Phoenix, Arizona, USA
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9781509034468
ISBN (Print)9781509034475
Publication statusPublished - May 2017

Publication series

ISSN (Electronic)2164-2974


  • Power amplifiers
  • Load modulation
  • Machine to machine communications
  • 4G mobile communication


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