Exploring symmetry in wireless propagation channels

Ehab Salahat, Ahmed Kulaib, Nazar Ali, Raed Shubair

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations


Wireless communications literature is very rich with empirical studies and measurement campaigns that study the nature of the wireless propagation channel. However, despite their undoubted usefulness, many of these studies have omitted a fundamental yet key feature of the physical signal propagation, that is, wireless propagation asymmetry. This feature does not agree with the electromagnetic reciprocity theorem, and the many research papers that adopt wireless channel symmetry, and hence rendering their modeling, unexpectedly, inaccurate. Besides, asymmetry is unquestionably an important characteristic of wireless channels, which needs to be accurately characterized for vehicular/mobile communications, 5G networks, and associated applications such as indoor/outdoor localization. This paper presents a modest and a preliminary study that reports potential causes of propagation asymmetry. Measurements conducted on Khalifa University campus in UAE show that wireless channels are symmetric in the absence of symmetry impairments. Therefore, care should be taken when considering some practical wireless propagation scenarios. Key conclusions and recommendation are summarized. We believe that this study will be inspiring for the academic community and will trigger further investigations within wireless propagation assumptions.

Original languageBritish English
Title of host publicationEuCNC 2017 - European Conference on Networks and Communications
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538638736
StatePublished - 13 Jul 2017
Event2017 European Conference on Networks and Communications, EuCNC 2017 - Oulu, Finland
Duration: 12 Jun 201715 Jun 2017

Publication series

NameEuCNC 2017 - European Conference on Networks and Communications


Conference2017 European Conference on Networks and Communications, EuCNC 2017


  • Channels Asymmetry
  • Localization
  • Multipath Fading
  • Synchronization
  • Wireless Propagation


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