Estimation and Comparative Analysis of Atmospheric Refractivity and Fade Depth for Microwave Links in Calabar
International Journal of Systems Science and Applied Mathematics
Volume 1, Issue 4, November 2016, Pages: 82-85
Received: Oct. 16, 2016;
Accepted: Dec. 28, 2016;
Published: Jan. 21, 2017
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Akinloye Bolanle Eunice, Department of Electrical/Electronic and Computer Engineering, University of Uyo, Akwa Ibom, Nigeria
Enyenihi Henry Johnson, Department of Electrical/Electronic Engineering, Akwa Ibom State University, Mkpat Enin, Nigeria
Ezenugu Isaac A., Department of Electrical Engineering, Imo State University (IMSU), Owerri, Nigeria
Generally, to radio link engineers, determination of fade depth and refractivity of propagation links remains very significant, especially, during radio propagation planning. It gives a good insight into the expected performances of the communication link and serves as bedrock to improve on Quality of Service (QoS). In this paper, three years (2012 to 2014) radiosonde atmospheric parameter data from Nigerian Meteorological Agency was used to determine the point refractivity gradient along with fade depth for Calabar, in Cross River state of Nigeria. In respect of the refractivity gradient for Calabar, the results showed the highest occurrence is in January with refractivity gradient of -33.0018 N units and the lowest refractivity gradient occurred in August with value of -305.2692 N units. Furthermore, the fade depth from the three different International Telecommunication Union (ITU) models; namely, ITU-R P.530-16 model, ITU-R P.530-14 model, and ITU-R P.530-9 model also indicated monthly and seasonal variations, with yearly average values of 139.74576 dB, 129.79196 dB and 154.57691 dB respectively.
Akinloye Bolanle Eunice,
Enyenihi Henry Johnson,
Ezenugu Isaac A.,
Estimation and Comparative Analysis of Atmospheric Refractivity and Fade Depth for Microwave Links in Calabar, International Journal of Systems Science and Applied Mathematics.
Vol. 1, No. 4,
2016, pp. 82-85.
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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