Outage Probability Analysis of Non-Orthogonal Multiple Access in Cloud Radio Access Networks
Outage Probability Analysis of Non-Orthogonal Multiple Access in Cloud Radio Access Networks
复制标题
DOI：
10.1109/lcomm.2017.2761828
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Xiang Gu;Xiaodong Ji;Z. Ding;Wenbin Wu;M. Peng
中科院分区：
文献类型：
--
作者：
Xiang Gu;Xiaodong Ji;Z. Ding;Wenbin Wu;M. Peng
为了提高系统容量和频谱利用率，并在云无线接入网(C-RAN)中支持更多的连接，本文考虑了在物理层应用非正交多址(NOMA)这一很有前途的技术。利用随机几何理论得到了基于NOMA的下行链路C-RAN的中断概率，其中远程无线头部均匀分布，同时为两个配对用户服务。给出了停运概率的封闭近似形式，并通过蒙特卡罗仿真验证了理论分析的准确性。理论分析和仿真结果表明，与传统的多址接入技术相比，提出的NOMA方案在C-RAN系统中具有更好的频谱效率和用户公平性。
To improve system capacity and spectral efficiency, as well as support more connections in cloud radio access networks (C-RANs), the application of non-orthogonal multiple access (NOMA), a promising technique in the physical layer, is considered in this letter. The stochastic geometry is used to obtain the outage probability of NOMA-based downlink C-RAN, in which the remote radio heads are uniformly distributed and serve two paired users simultaneously. A closed-form approximation for the outage probability is derived, and Monte Carlo simulations are provided to validate the accuracy of the theoretical analysis. Compared with conventional multiple access techniques, both the obtained analytical and simulation results demonstrate that the proposed NOMA scheme can offer better spectral efficiency and user fairness in C-RANs.