Bit Error Rate Analysis of Non-Orthogonal Multiple Access (NOMA) Technique in 5G with Different Power and User Scenarios

Non-orthogonal multiple access (NOMA) is a potential multiple access technique for the fifth-generation (5G) and beyond wireless networks. By allowing multiple users to share the same time and frequency blocks by dividing their power levels, NOMA can scale up the number of served users, increase the spectral efficiency (SE), and improve bit error rate (BER) compared to existing orthogonal multiple access (OMA) techniques. This paper discusses the performance and challenges of NOMA with various power allocation ratios and a different number of users, comparatively. Simulation results are provided at the end of the paper in terms of BER at the receiver end using different power proportions and number of users that share the same frequency resources.