Capacity Enhancement of NOMA-MIMO With OAM-IM

초록

In this letter, non-orthogonal multiple access (NOMA) is integrated with orbital angular momentum (OAM)-based multiple-input multiple-output (MIMO), denoted as OAM-MIMO, and OAM with index modulation, denoted as OAM-IM, to improve its downlink channel capacities for multiple users. The user and sum channel capacities are evaluated and compared with those of existing schemes such as NOMA with OAM-MIMO, conventional NOMA with MIMO, and conventional orthogonal multiple access with OAM-IM. The simulation results show that the proposed scheme outperforms the conventional schemes in terms of both individual user and sum channel capacities.

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