A Novel NOMA Design Based on Steiner System

In this paper, a code-domain Non-orthogonal Multiple access (NOMA) technique based on combinatorial structures with balanced incomplete block design is studied. Initially, a Steiner system (STS) is used for its specific highly structured and fair resource allocation properties. A new multiuser detection scheme is provided. Compared with traditional serial and iterative MUD scheme, our scheme is capable of working in parallel with low complexity. Simulation results on Rayleigh and Additive White Gaussian Noise (AWGN) channels shows that our system outperforms than similar code-domain NOMA techniques with higher overload factor and spectrum efficiency.

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