论文标题
随机启用NOMA的异质网络中的物理层安全性
Physical Layer Security in Random NOMA-Enabled Heterogeneous Networks
论文作者
论文摘要
本文分析了非正交多访问（NOMA）启用的异质网络（HETNETS）中物理层保密方法的性能。考虑了$ k $ tier的多细胞hetnet，包括所有层中采用的诺玛。基站，合法用户（在两用户的NOMA设置中）和被动窃听器（都带有单骨均随机分布）。假设淋巴结分布的独立泊松点过程，则利用随机几何方法来表征千古的保密率。在特殊情况下，在沿着崇高的秘密率的下限以及对合法用户的奇异率的封闭形式表达式。此外，在具有消失的噪声方差的干扰限制方案中，获得了厄尔及性保密率的简单表达式。多层技术，NOMA和物理层保密的影响是使用数值结果研究的。结果表明，将HETNET应用于安全的多细胞NOMA系统可提高频谱效率性能。
The performance of physical layer secrecy approach in non-orthogonal multiple access (NOMA)-enabled heterogeneous networks (HetNets) is analyzed in this paper. A $K$-tier multi-cell HetNet is considered, comprising NOMA adopted in all tiers. The base stations, legitimate users (in a two-user NOMA setup), and passive eavesdroppers, all with single-antenna, are randomly distributed. Assuming independent Poisson point processes for node distribution, stochastic geometry approaches are exploited to characterize the ergodic secrecy rate. A lower bound on the ergodic secrecy rate along with closed-form expressions for the lower bound on the ergodic rates of the legitimate users in a special case are derived. Moreover, simpler expressions for the ergodic secrecy rate are obtained in the interference-limited regime with vanishing noise variance. The effect of multi-tier technology, NOMA, and physical layer secrecy are investigated using numerical results. The results reveal that applying HetNet to a secure multi-cell NOMA system improves the spectrum efficiency performance.
