2020/11/28 by Animesh Yadav, Quan Chen, Yadav, Animesh +5
Engineering · #Advanced Wireless Communication Technologies #Satellite Communication Systems #Optical Wireless Communication Technologies
paper · pdf · doi:10.48550/arxiv.2011.14073
In this paper, we study the uplink channel throughput performance of a\nproposed novel multiple-antenna hybrid-domain non-orthogonal multiple access\n(MA-HD-NOMA) scheme. This scheme combines the conventional sparse code multiple\naccess (SCMA) and power-domain NOMA (PD-NOMA) schemes in order to increase the\nnumber of users served as compared to conventional NOMA schemes and uses\nmultiple antennas at the base station. To this end, a joint resource allocation\nproblem for the MA-HD-NOMA scheme is formulated that maximizes the sum rate of\nthe entire system. For a comprehensive comparison, the joint resource\nallocation problems for the multi-antenna SCMA (MA-SCMA) and multi-antenna\nPD-NOMA (MA-PD-NOMA) schemes with the same overloading factor are formulated as\nwell. Each of the formulated problems is a mixed-integer non-convex program,\nand hence, we apply successive convex approximation (SCA)- and reweighted\n\ℓ1 minimization-based approaches to obtain rapidly converging solutions.\nNumerical results reveal that the proposed MA-HD-NOMA scheme has superior\nperformance compared to MA-SCMA and MA-PD-NOMA.\n