Cellular Mobile Radio Propagation Characteristics: Case Study of Globacom and Mobile Telecommunications Networks (MTN)
Cellular Mobile Radio Propagation Characteristics: Case Study of Globacom and Mobile Telecommunications Networks (MTN)
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Date
2006-03
Authors
SHITTU, Waliu Adisa
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Abstract
This thesis is on the study of Cellular Mobile Radio Signal Propagation Characteristics.
Measurements of received signal powers were taken when the measuring device was moving
outwards from some selected Base Stations along the Propagation paths, in outdoor
environments (rural and urban). The variations of the signal in relation to distance away from
the Base Stations were closely studied. The main propagation mechanisms of the radio signal
such as direct propagation, reflection, and diffraction were considered. Effects of these
mechanisms such as path loss, multipath propagation, and shadowing were investigated. In
order to study these effects, two site-specific scenarios were chosen. The first scenario
consisted of open/rural areas on some selected roads along which measurements were taken
with a Cellular Mobile Network Analyser being moved away from the base stations. The
second scenario comprised some selected buildings on Ahmadu Bello University (ABU)
main campus. Here, multipath propagation and shadowing effects of the buildings were
considered in order to study the characteristics of the received signal power levels. Using
parameters of the base stations studied in this investigation in the Free-Space and
Okumura/Hata models, values of received signal power and path loss obtained were found to
fall short significantly from averaged values obtained from measurements. For scenario 1, the
mean differences were +54.73 dBm and -42.81 dB for the received signal power and path
loss respectively and the corresponding value for received signal power was +12.60 dBm, for
scenario 2. These mean differences are too significant to be neglected. Thus, they constituted
correction factors in the new proposed models which closely approximate measurement
values. Finally, these new proposed models were coded using C programming language.
Description
A Thesis submitted to the Electrical Engineering Department, Ahmadu Bello
University, Zaria, in Partial Fulfillment of the Requirements for the award of the
Degree of Master of Science (M.Sc.) in Electrical Engineering.
Keywords
Cellular,, Mobile Radio, Propagation,, Characteristics,, Case Study,, Globacom,, Mobile,, Telecommunications,, Networks (MTN)