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With the explosive growth of mobile services, non-orthogonalbroadcast/multicast transmissions can effectively improves spectrum efficiency.Nonorthogonal multiple access (NOMA) represents a paradigm shift fromconventional orthogonal multiple-access (OMA) concepts and has been recognizedas one of the key enabling technologies for fifth-generation (5G) mobilenetworks. In this paper, a two-tier heterogeneous network is studied, in whichthe wireless signal power is partitioned by the NOMA scheme. Moreover, thecoverage probability, the average rate and the average QoE are derived toevaluate network performance. Simulation results show that compared with theOMA method, non-orthogonal broadcast/multicast method improve both the averageuser rate and QoE in the two-tier heterogeneous network.

Performance Analysis of Non-Orthogonal Multicast in Two-tier Heterogeneous Networks