Research Article
A Unified Approach to Analyze the Performance of NOMA with Different Grouping Strategies in Downlink
@INPROCEEDINGS{10.1007/978-3-031-86203-8_23, author={Jinqiang Li and Xiaomeng Luo and Hsiao-Hwa Chen and Shuyi Chen and Qing Guo}, title={A Unified Approach to Analyze the Performance of NOMA with Different Grouping Strategies in Downlink}, proceedings={Wireless and Satellite Systems. 14th EAI International Conference, WiSATS 2024, Harbin, China, August 23--25, 2024, Proceedings, Part II}, proceedings_a={WISATS PART 2}, year={2025}, month={3}, keywords={NOMA downlink ergodic sum capacity outage performance multiple clusters mixed user grouping}, doi={10.1007/978-3-031-86203-8_23} }- Jinqiang Li
Xiaomeng Luo
Hsiao-Hwa Chen
Shuyi Chen
Qing Guo
Year: 2025
A Unified Approach to Analyze the Performance of NOMA with Different Grouping Strategies in Downlink
WISATS PART 2
Springer
DOI: 10.1007/978-3-031-86203-8_23
Abstract
This paper conducts an analysis and investigation of outage performances and ergodic sum capacity for different users within each cluster in downlink non-orthogonal multiple access (NOMA) systems. Analytical expressions for outage performance and ergodic sum capacity are derived and analyzed. The analysis and simulation demonstrate that NOMA systems with more users in one cluster exhibit higher performance with lower average channel gains, while NOMA systems with fewer users in one cluster exhibit higher performance with higher average channel gains. This suggests the need for different user grouping strategies under varying signal-to-noise ratio conditions, and the fixed user grouping schemes for NOMA systems are inadequate to adapt to complex environments and diverse services. Consequently, this paper brings in the mixed user grouping NOMA systems, which offers greater advantages comparing to orthogonal multiple access (OMA) and conventional NOMA. Finally, this study provides pathways for further research on mixed user grouping in downlink NOMA systems.
