Interference Mitigation and Power Allocation Scheme for Downlink MIMO–NOMA HetNet
Interference Mitigation and Power Allocation Scheme for Downlink MIMO–NOMA HetNet
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DOI：
10.1109/tvt.2019.2918336
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发表时间：
2019-05
影响因子：
6.8
通讯作者：
Ahmed Nasser;O. Muta;M. Elsabrouty;H. Gačanin
中科院分区：
文献类型：
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作者：
Ahmed Nasser;O. Muta;M. Elsabrouty;H. Gačanin
针对异构网络（HetNets）中采用多输入多输出（MIMO）技术的下行非正交多址接入（NOMA），提出了一种新的干扰抑制和功率分配方案。提出的方案，命名为PA的干扰对齐和协调波束形成（PA-IA-CB），包括两个阶段。第一阶段应用IA-CB的两个步骤;一个步骤用于消除小小区之间的簇间干扰和同层干扰，而另一个步骤处理宏小区内的簇间干扰。在第二阶段中，提出通过适当地处理分配给宏基站（MBS）和小基站（SBS）的功率来管理跨层干扰。PA问题被建模为MBS和SBS之间的非合作博弈，以提高系统的和速率。仿真结果验证了所提出的技术的效率，在总的系统和速率和中断概率相比，传统的计划。
In this paper, a novel interference mitigation and power allocation (PA) scheme is investigated for downlink non-orthogonal multiple access (NOMA) with multiple input multiple output (MIMO) technology in heterogeneous networks (HetNets). The proposed scheme, named PA based interference alignment and coordinated beamforming (PA-IA-CB), consists of two stages. The first stage applies two steps of IA-CB; one step for canceling the inter-cluster and the co-tier interference among small cells, whereas the other step deals with the inter-cluster interference within the macro cell. In the second stage, the cross-tier interference is proposed to be managed by properly handling the allocated power to the macro base station (MBS) and the small base stations (SBSs). The PA problem is modeled as a non-cooperative game between the MBS and the SBS with the aim of increasing the system sum rate. Simulation results verify the efficiency of the proposed technique in terms of total system sum rate and outage probability compared to the conventional schemes.