Forwarding Strategy Selection in Dual-Hop NOMA Relaying Systems
Forwarding Strategy Selection in Dual-Hop NOMA Relaying Systems
复制标题
双跳 NOMA 中继系统中的转发策略选择
DOI：
10.1109/lcomm.2018.2803809
复制
发表时间：
2018-08-01
期刊：
影响因子：
--
通讯作者：
Fan, Pingzhi
中科院分区：
文献类型：
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作者：
Xiao, Yue;Hao, Li;Fan, Pingzhi
在未来的无线通信系统中，具有完美连续干扰消除的非正交多址接入（NOMA）是一个新兴的研究课题。在这项工作中，NOMA被应用到双跳中继系统，其中的信号被发送的援助，无论是解码和转发（DF）或放大和转发（AF）中继。推导了独立瑞利衰落信道下AF方案的中断概率和遍历容量的精确表达式，并给出了AF方案中断概率的严格上界。在此基础上，研究了固定功率分配和优化功率分配两种情况下的转发策略选择。仿真结果验证了分析的正确性和所提出的转发策略的有效性。
Non-orthogonal multiple-access (NOMA) with perfect successive interference cancellation is an emerging research topic in the future wireless communication systems. In this work, NOMA is applied to dual-hop relaying systems, where the signals are transmitted with the aid of either decode-and-forward (DF) or amplify-and-forward (AF) relay. Exact expressions for outage probability and ergodic capacity are derived over independent Rayleigh fading channels, and a tight upper bound for the outage probability of AF scheme is provided. Based on the analysis, we study forwarding strategy selection for both fixed and optimized power allocation. The presented simulations verify the accuracy of the analysis, and the efficiency of the proposed forwarding strategy.