Spectrum Efficiency improvement in 5G Network using NOMA

Non-Orthogonal Multiple Access (NOMA) achieves optimal spectrum requirements of 5G and future networks. The research work focuses on how to increase the absolute efficiency (SE) of the NOMA energy domain in the 5G network using two new approaches and a smart radio network. These methods use Massive MIMO, Simple-Input and Simple-Output, and Single-Input and Single-Output in a single cellular network. NS2 software was used for situations by distances, power placement coefficients & transmission power to test proposed approaches. Each scenario implies that users are using the Quadrature Phase Shift Keying modulation technique and operating within defined bandwidths. The performance assessment considers frequency selective Rayleigh fading, unstable channel circumstances & successive interference cancellation. Outcomes show that downlink NOMA with a single input and single output achieves the best spectral efficiency performance. Spectral efficiency increases when paired with cooperative cognitive radio network. The results show that SE is greatly increased by using MIMO & M-MIMO techniques.