Experimental Validation of Non-Orthogonal Multiple Access (NOMA) Technique using Software Defined Radio

For last few years, the usage of bandwidth is being increased rapidly due to the growth of advanced applications and services. Therefore, it is required to depend on various multiple access techniques to maximize the spectrum efficiency. Non-orthogonal multiple access (NOMA) is recognized as a prominent technique to increase the spectrum utilization for upcoming wireless technologies. In this paper, the experimental validation of NOMA system is carried out with the help of software defined radio testbed by considering 4 users maintaining various distances from the base station. The necessity of successive interference cancellation (SIC) for NOMA is tested experimentally and results are presented. Obtained results show that the NOMA system has a better improvement in terms of bit error rate after applying SIC.