Analysis and design of smart antenna arrays (SAAs) for improved directivity at GHz range for wireless communication systems.

Doctor of Philosophy in Electronic Engineering. University of KwaZulu-Natal, Durban 2018.Abstract available in PDF file

Prediction of Gaseous Attenuation of Satellite Signal in Nigeria

It would be noticed that the rate at which people are demanding for satellite services has drastically increased due to increment in population. However, one of the apprehensions of satellite telecommunication engineer is the effects imposed on the earth-to space path link by gaseous attenuation. The research conducted in this paper bordered about investigation with comparison of prediction models for gas attenuation in the six locations in Nigeria, with each of the location taken from six geopolitical within the country. The cities considered for the analysis are: Kaduna (), Lagos (), Abuja (), Portharcort (), Enugu () and Bauchi (). Five-year radiosonde data were used in predicting gas attenuation in the cities selected which represent the geographical characteristics of each zone. Monthly variation of tropospheric components for each zone were computed. Influence of gas attenuation at different frequency bands for each zone were analysed. The results indicated that at clear-sky scenario, gas attenuation effects are still seen on satellite communication. Therefore, this research work would provide the needed statistical data of gas attenuation which would be of tremendous advantage for the link designers for their subsequent planning and design of good telecommunication systems in the six geopolitical zones of Nigeria

Contemporary Factors Determining the Choice of Supermarket Patronage in Ado-Ekiti Metropolis of Nigeria

This study examined the contemporary factors (quality, price, assurance and distance) determining the choice of supermarkets inAdo-Ekiti Metropolis. A descriptive survey research design was adopted for the study. The population of the study constituted thewalk-in customers of the selected supermarkets in Ado-Ekiti metropolis. The sample size was 200customers using random sampling. Primary data used for the study were gathered through a structured questionnaire. Data gathered were analyzed usingmultiple regression. The result showed that product quality positively affects customer patronage; furthermore, the result showedthat product price positively affects customer patronage; more so, the result showed that assurance positively affects customerpatronage and finally, distance does not significantly affect customer patronage all at 0.05 level of significance. Thus, the studyconcluded, that product quality, product price and assurance statistically and significantly affects customer patronage amongsupermarkets in Ado-Ekiti Metropolis