Non-Orthogonal Multiple Access in Massive MIMO Aided Heterogeneous Networks
Non-Orthogonal Multiple Access in Massive MIMO Aided Heterogeneous Networks
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DOI：
10.1109/glocom.2016.7842027
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发表时间：
2016-12
期刊：
影响因子：
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通讯作者：
Yuanwei Liu;Zhijin Qin;M. Elkashlan;Yue Gao;A. Nallanathan
中科院分区：
文献类型：
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作者：
Yuanwei Liu;Zhijin Qin;M. Elkashlan;Yue Gao;A. Nallanathan
本文研究了非正交多址(NOMA)在千兆层异质网络(HetNet)中的应用。提出了一种新的传输框架，其中宏蜂窝采用海量多输入多输出(MIMO)，小蜂窝采用NOMA。为了最大化移动用户的有偏平均接收功率，提出了一种基于MIMO和NOMA的大规模用户关联方案。为了评估所提框架的性能，利用随机几何推导了每一层的频谱效率的解析表达式。仿真结果验证了所提出的解析推导的准确性，并证实了与基于正交多址(OMA)的HetNet相比，NOMA能够提高网络的频谱效率。
In this paper, the application of non-orthogonal multiple access (NOMA) into $K$-tier heterogeneous networks (HetNets) is investigated. A new promising transmission framework is proposed, in which massive multiple-input multiple-output (MIMO) is employed in macro cells and NOMA is adopted in small cells. For maximizing the biased average received power at mobile users, a massive MIMO and NOMA based user association scheme is developed. In an effort to evaluate the performance of the proposed framework, analytical expressions for the spectrum efficiency of each tier are derived using stochastic geometry. Simulation results are presented to verify the accuracy of the proposed analytical derivations and confirm that NOMA is capable of enhancing the spectrum efficiency of the network compared to the orthogonal multiple access~(OMA) based HetNets.