Browsing by Author "Abdulrahman, Amuda Yusuf"

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    Enhancing Indoor Positioning Systems Accuracy with Optimal Placement of Wi-Fi Access Points
    (Tafila Technical University, Jordan, 2024-03) Isa, Abdurrhaman Ademola; Akanni, Jimoh; Abdulrahman, Amuda Yusuf; Alao, Rasaq Atanda
    The indoor positioning system (IPS) has generated a considerable amount of interest in recent times, and the prosperity of the system’s development is heavily reliant on its ability to accurately locate objects. The performance measure is significantly impacted by the location of access points (APs). However, the bulk of previous studies have tended to overlook the matter of optimal AP placement and efficient design for IPS due to the dependence on pre-existing installed APs, which were chiefly formulated for coverage objectives. In this investigation, an optimal placement function – which is reliant on mean and variance – has been developed using received signal strength (RSS) measurements data. The performance evaluation in this research is based on experimentation and compared with currently employed placement methods. The results indicate that the most optimal function value for the suggested method is 1.5714, which is substantially smaller than the values for rectangular, triangular, and triangular II, which are 12.468, 5.5364, and 8.5147, respectively. When the recommended placement strategy is employed instead of the existing ones, the weighted K-nearest algorithm (WKNN) for location error, using average RSS as the fingerprint radio map database, yielded a heightened degree of precision.
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    Prediction of Run-off Time for Water Film Thickness and the Effects on Wet Antenna Attenuation
    (FUOYE Journal of Engineering and Technology (FUOYEJET), 2023-03) Abdulrahman, Amuda Yusuf; Salaudeen, Kazeem; Zakariyya, Sikiru Olayinka; Akanni, Jimoh; Afolabi, A. S; Ajiboye, A . T
    Most of the reported works on wet antenna attenuation (WAA) focused on the estimation of the water-layer thickness without considering the time taken to be drained off from the reflector (that is, the runoff time). Simulated rain experiments were conducted on a parabolic antenna with a diameter of 0.6 m. Based on measurement data, this study examined the parametric effects of rain rate on water film thickness and runoff duration, and then associated those findings to the overall WAA. It was found that WAA increases with the water film thickness, while decreasing with the runoff time. More so, the latter quantity both increase with the antenna dish size. The study is useful in accounting for the WAA component in the overall link budget design for adequate service delivery.