Dynamic power al strategy for uplink non-orthogonal multiple access systems
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作者
Wang, Xingwei; Xu, Tianheng; Zhou, Ting; Hu, Honglin
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刊物名称
COMPUTER COMMUNICATIONS
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年、卷、文献号
2022, 184, 0140-3664
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关键词
Wang, Xingwei; Xu, Tianheng; Zhou, Ting; Hu, Honglin
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摘要
Power al has a significant impact on sum rate in non-orthogonal multiple access (NOMA) systems. In this paper, we propose a dynamic power al (D-NOMA) strategy that can optimize the sum rate compared with the fixed power al (F-NOMA) method in uplink NOMA systems. In particular, we first design an evaluation model to analyze several key constraints for optimization objectives, and then derive the optimal power al coefficients. The simulation results demonstrate that the proposed strategy outperforms the existing fixed power al strategies with different coefficients and occupies more advantage on the low SNR than other D-NOMA scheme in typical uplink pairing scenarios.
