Abstract
We investigate the uplink resource allocation problem for virtualized wireless networks (VWNs) supported by multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) and present a sensitivity analysis to imperfect successive interference cancellation (SIC) and various system parameters. The proposed algorithm for power and sub-carrier allocation is derived from the non- convex power minimization subject to rate and sub- carrier reservations, for which an optimal solution is NP-hard. To develop an efficient solution, the resource allocation is decomposed into separate power and sub-carrier allocation problems and an iterative algorithm based on successive convex approximation and complementary geometric programming is proposed. Simulation results demonstrate that compared to orthogonal multiple access, the proposed algorithm for MIMO NOMA can offer significant improvement in spectrum and power efficiency.
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