Capacity, Spectral and Energy Efficiency of OMA and NOMA Systems

Background: As the demand for wireless communications grows, optimizing various access strategies becomes more important. This article compares Orthogonal Multiple Access (OMA) and Non-Orthogonal Multiple Access (NOMA) wireless communication methods.Objective: The primary aim is to understand and assess the capacity, spectrum efficiency, and energy efficiency of both OMA and NOMA systems using real data from thorough simulations and analysis.Methods: The study employs simulation data and practical analyses to assess multiple access approaches and their underlying technologies. It focuses on the two systems' performance metrics in real-world circumstances.Results: The results show that NOMA systems outperform OMA systems regarding capacity and spectrum efficiency. NOMA supports more users within the same bandwidth and has greater system throughput. Furthermore, the energy efficiency study shows that NOMA outperforms OMA, implying a more energy-efficient system with improved overall network performance.Conclusion: The findings provide light on the performance dynamics of OMA and NOMA systems. These discoveries are critical for designing, optimizing, and developing improved wireless communication networks capable of meeting the needs of current wireless applications.