Oyibo Dafe Precious

Experimental Evaluation of PMD Effects in NRZ and QAM-modulated High-speed Optical Systems in Abuja, Nigeria

Oyibo Dafe Precious, Samuel Oghenemega Shaka, Agbosa Tobore Roseline, Cletus Olisenekwu & Ikoko Precious · Physical Science International Journal · 2025

This study presents an experimental evaluation of Polarization Mode Dispersion (PMD) effects on high-speed optical communication systems in Abuja, Nigeria, using Non-Return-to-Zero (NRZ) and Quadrature Amplitude Modulation (QAM) formats over single-mode fiber. Tests were conducte...

Open access Research Article 10.9734/psij/2025/v29i5898

Temperature-Dependent Study of Optical, Electrical, and Structural Properties of Gadolinium-Doped Zirconium Sulphide Thin Films Fabricated Via Electrostatic Spray Deposition Technique for Optoelectronic Applications

Cletus Olisenekwu, Samuel Oghenemega Shaka, Oyibo Dafe Precious, Imosobomeh L. Ikhioya & Raceforth Atori · Asian Journal of Research and Reviews in Physics · 2025

This study investigates the structural, optical, morphological, and electrical properties of gadolinium-doped zirconium sulphide (ZrS/Gd) thin films created using the Electrostatic Spray Deposition (ESD) method with respect to the effects of deposition temperature. Thin films dep...

Open access Research Article 10.9734/ajr2p/2025/v9i3197

Signal Optimization and Energy-Efficient Design of Reconfigurable Intelligent Surface (RIS)-Assisted Non-Orthogonal Multiple Access (NOMA) Networks: A Simulation-Based Investigation

Ikoko Precious, Samuel Oghenemega Shaka, Enoh Pius Ogherohwo, Cletus Olisenekwu & Oyibo Dafe Precious · Asian Journal of Research in Computer Science · 2025

This study looks at signal optimization and energy-efficient design in Reconfigurable Intelligent Surface (RIS)-assisted Non-Orthogonal Multiple Access (NOMA) networks using simulation. RIS improves wireless communication by reflecting signals intelligently. This boosts spectral...

Open access Research Article 10.9734/ajrcos/2025/v18i7732