Faculty of Telecommunications Services, Telecommunications University, Khanh Hoa 650000, Vietnam.
Department of Telecommunications, Posts and Telecommunications Institute of Technology, Ho Chi Minh 700000, Vietnam.
Sensors (Basel). 2020 Nov 12;20(22):6472. doi: 10.3390/s20226472.
In this paper, we consider a two-user downlink full-duplex (FD) non-orthogonal multiple access (NOMA) relay system where the FD relay uses an energy harvesting (EH) technique to assist the communication between the base station and far user over flat, independent and non-identically Rayleigh fading channels. Importantly, since the relay operates in FD mode, we take into account the effect of the interference caused by relay on the near user. Considering this EH-FD-NOMA relay system, we derive the exact mathematical expressions of the outage probabilities and ergodic capacities of near and far users. Monte-Carlo simulations verify the accuracy of our analytical method. Numerical results provided in this paper allow system designers to clearly see not only the impacts of the power distribution factor and the self-interference cancellation capacity of the relay but also the influence of the strength of inter-user interference at the near user on the outage performances and ergodic capacities of both users.
在本文中，我们考虑了一个两用户下行链路全双工（FD）非正交多址（NOMA）中继系统，其中 FD 中继使用能量收集（EH）技术来协助基站与远用户之间的通信，采用平坦、独立且非恒同瑞利衰落信道。重要的是，由于中继以 FD 模式运行，我们考虑了中继对近用户造成的干扰的影响。考虑到这个 EH-FD-NOMA 中继系统，我们推导出了近用户和远用户的中断概率和遍历容量的精确数学表达式。蒙特卡罗模拟验证了我们分析方法的准确性。本文提供的数值结果使系统设计人员不仅可以清楚地看到功率分配因子和中继自干扰消除能力的影响，还可以看到近用户处用户间干扰的强度对两个用户的中断性能和遍历容量的影响。
