NB-IoT Devices in Reverberation Chambers: A Comprehensive Uncertainty Analysis

A. Hubrechsen (Corresponding author), Kate A. Remley, Rob Jones, Rob Horansky, Vincent Neylon, L.A. (Sander) Bronckers

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

New protocols related to Internet-of-things applications may introduce previously unnoticed measurement effects in reverberation chambers (RCs) due to the narrowband nature of these protocols. Such technologies also require less loading to meet the coherence-bandwidth conditions, which may lead to higher variations, hence uncertainties, across the channel. In this work, we extend a previous study of uncertainty in NB-IoT and CAT-M1 device measurements in RCs by providing, for the first time, a comprehensive uncertainty analysis of the components related to the reference and DUT measurements. By use of a significance test, we show that certain components of uncertainty become more dominant for such narrowband protocols, and cannot be considered as negligible, as in current standardized test methods. We show that the uncertainty, if not accounted for by using the extended formulation, will be greatly overestimated and could lead to non-compliance to standards.

Original languageEnglish
Number of pages9
JournalInternational Journal of Microwave and Wireless Technologies
VolumeXX
Issue numberXX
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • CAT-M1
  • Internet of things
  • NB-IoT
  • cellular telecommunications
  • chamber transfer function
  • reverberation chamber
  • uncertainty
  • wireless system

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