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Title: Resource allocation for sum-rate maximization in NOMA-based generalized spatial modulation
Authors: Li, G
Hong, Z
Pang, Y
Xu, Y
Huang, Z
Keywords: Resource allocation;NOMA;Spatial modulation;Power allocation;User grouping
Issue Date: 24-Feb-2022
Citation: Li, G., Hong, Z., Pang, Y., Xu, Y. and Huang, Z. (2022) 'Resource allocation for sum-rate maximization in NOMA-based generalized spatial modulation', Digital Communications and Networks, 0 (In press), pp. 1- 8. doi: 10.1016/j.dcan.2022.02.005.
Abstract: The Multiple-input Multiple-output (MIMO) Non-orthogonal Multiple Access (NOMA) based on Spatial Modulation (SM-MIMO-NOMA) system has been proposed to achieve better spectral efficiency with reduced radio frequency chains comparing to the traditional MIMO-NOMA system. To improve the performance of SM-MIMO-NOMA systems, we extend them to generalized spatial modulation scenarios while maintaining moderate complexity and fairness. In this paper, system spectral efficiency and transmission quality improvements are proposed by investigating a sum-rate maximization resource allocation problem that is subject to the total transmitted power, user grouping, and resource block constraints. To solve this non-convex and difficult problem, a graph-based user grouping strategy is proposed initially to maximize the mutual gains of intragroup users. An auxiliary-variable approach is then adopted to transform the power allocation subproblem into a convex one. Simulation results demonstrate that the proposed algorithm has better performance in terms of bit error rate and sum rates.
ISSN: 2468-5925
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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