NOMA/OMA Mode Selection-Based Cell-Free Massive MIMO
NOMA/OMA Mode Selection-Based Cell-Free Massive MIMO
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DOI：
10.1109/icc.2019.8761072
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
M. Bashar;K. Cumanan;A. Burr;H. Ngo;L. Hanzo;P. Xiao
中科院分区：
文献类型：
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作者：
M. Bashar;K. Cumanan;A. Burr;H. Ngo;L. Hanzo;P. Xiao
本文研究了基于非正交多址（NOMA）的无小区大规模多输入多输出（MIMO）系统，其中用户被分组到多个簇中。利用共轭波束形成，在假设用户仅基于信道统计信息进行实际连续干扰消除（SIC）的情况下，推导了系统的带宽效率（BE）。研究了最小用户BE最大化的最大-最小公平性问题，提出了一种迭代二分法来确定最大-最小BE问题的最优解。数值结果验证所提出的设计的性能，并设想一个模式切换方案，选择一个特定的模式= {OMA，NOMA}，最大限度地提高系统的BE。
In this paper, non-orthogonal-multiple-access (NOMA)-based cell-free massive multiple-input multiple-output (MIMO) is investigated, where the users are grouped into multiple clusters. Exploiting conjugate beamforming, the bandwidth efficiency (BE) of the system is derived while the assumption that the users performing realistic successive interference cancellation (SIC) based on only the knowledge of channel statistics. The max-min fairness problem of maximizing the lowest user BE is investigated and an iterative bisection method is developed to determine the optimal solution to the max-min BE problem. Numerical results are presented for validating the proposed design's performance, and a mode switching scheme is conceived for selecting a specific Mode = {OMA, NOMA} that maximizes the system's BE.