Browsing by Author "Sikiru, Ismael, A."

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    Performance Analysis Of Empirical Propagation Models For Fixed Wireless Application
    (faculty of Communication and Information Sciences, University of Ilorin., 2018-04-20) Adebowale, Quadri, R; Adeniran, Caroline , T; Sowande, Olugbenga, A; Imam-Fulani, Yusuf, O.; Onidare, Samuel, O; Sikiru, Ismael, A.
    In this study, an efficacy assessment was carried out on 5 most widely used empirical propagation models by using MATLAB simulator to compare these models for FWA in both urban and suburban environment. Simulations were carried out at two different frequencies of 2.5 GHz and 3.5 GHz with a transmitter height of 30 m and varying distance from 250 m to 10 km. Three different receiver antenna heights of 3 m, 6 m, & 10 m were considered. The results indicated that, Ericsson model has the least prediction of 145 dB to 147 dB at 10 m and 6 m receivers’ antenna height respectively, operating on 2.5 GHz frequency in urban environment. Apparently, COST 231 Hata indicated the highest predicted path loss at 10 m and 6 m with predictions of 160 dB and 162 dB respectively in urban environment while the SUI model revealed the least variation of propagation loss of 136 dB to 138 dB. Similarly, the study revealed that Ericsson model has the lowest predicted path loss (150 dB to 153 dB) in an urban environment at 3.5 GHz. The study concluded that no specific model predicted the least path loss for both urban and suburban environment with the varying receiver antenna heights.
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    Spatial variability analysis of duty cycle in GSM band
    (IEEE, 2018-02-08) Faruk, Nasir; Imam-Fulani, Yusuf; Sikiru, Ismael, A.; popoola, Segun, I.; Oloyede, Abdulkarim, A; Olawoyin, Lukmon, A.; Surajudeen-Bakinde, N. , T.
    The introduction of new kinds of technological products, applications and services that rely on wireless communications has resulted into an upsurge in global mobile data traffic. There is, therefore, a need to investigate the efficient utilization of the limited available radio spectrum. In this paper, we examine the spatial variation of spectrum occupancy (i.e. duty cycle) in the GSM 900 MHz band within Kwara State, Nigeria. Experimental results show that there is a very high spatial variance in duty cycle from one location to the other with mean occupancies of 1.67% and 17.76% in rural and urban locations respectively. It is worthy to mention that some rural locations recorded 0% duty cycle. Therefore, the telecommunication industry in Nigeria should adopt useful techniques to maximize the scarce radio resources, especially for rural areas.