Effect of the Variation of Atmospheric Refractive Index on Signal Transmission for Digital Terrestrial Television in Jos, Nigeria

Jangfa T. Zhimwang, Enoh P. Ogherohwo, Akintunde A. Alonge, Agbalagba O. Ezekiel, Shaka O. Samuel

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


In this paper, the effect of the variation of atmospheric refractive index on digital terrestrial television signal is examined. Combined measurements of signal strength and atmospheric parameters - such as temperature, relative humidity and atmospheric pressure - were obtained using network analyzer and weather station respectively. Data obtained over the period of twelve months were processed and analyzed based on International Telecommunication Union (ITU) recommendations. Results obtained revealed mild variation in the atmospheric parameters resulting in the fluctuation of atmospheric refractive index, which in turn affects the transmitted digital terrestrial television (DTT) signal. A monthly summary of these variations are as thus: from January (63.82dBuVm), February (55.81 dBuV/m), March (59.99 dBuV/m), April (62.39 dBuV/m), May (56.31 dBuV/m), June (54.54 dBuV/m), July (49.66 dBuV/m), August (50.80 dBuV/m), September (51.64 dBuV/m), October (51.00 dBuV/m), November (56.34 dBuV/m) and December (60.51 dBuV/m). It was discovered that fluctuations in refractive index contribute to atmospheric interference effects such as fading and multipath propagation. This results in loss of signal strength and increased errors in signal reception, hence, the observed variation in received signal strength for all the months under review.

Original languageEnglish
Title of host publicationProceedings of the 16th IEEE AFRICON, AFRICON 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350336214
Publication statusPublished - 2023
Event16th IEEE AFRICON, AFRICON 2023 - Nairobi, Kenya
Duration: 20 Sept 202322 Sept 2023

Publication series

NameIEEE AFRICON Conference
ISSN (Print)2153-0025
ISSN (Electronic)2153-0033


Conference16th IEEE AFRICON, AFRICON 2023


  • Atmosphere
  • Digital Receiver
  • Refractive Index
  • Signal Strength
  • Television Broadcasting
  • Terrestrial Transmission

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering


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