论文标题
关于非正交多访问（NOMA）的性能：地面与空中网络
On the Performance of Non-Orthogonal Multiple Access (NOMA): Terrestrial vs. Aerial Networks
论文作者
论文摘要
非正交的多重访问（NOMA）是超越第五代（B5G）蜂窝无线网络的有希望的多访问技术，在该网络中，可以使用在接收器的发射机和自我扰动取消（SIC）上使用叠加置换编码的概念，可以在单个时频资源块上提供几个用户。对于地面网络，众所周知，NOMA比传统正交多访问（OMA）获得了可实现的NOMA性能。但是，与地面网络相比，空中网络中NOMA的可实现性能并没有得到很好的理解。在本文中，我们提供了一个统一的分析框架，以表征考虑各种网络设置的用户的中断概率，例如i）航空网络中的上行链路和下行链路Noma和OMA，以及II）地面网络中的上行链路和下行链路NOMA和OMA。特别是，考虑到感应线（LOS）RICIAN褪色渠道，我们为两个用户得出了封闭形式的打故障概率表达式。数值结果验证了派生的分析表达式，并证明了OMA和NOMA传输用户的中断概率的差异。数值结果揭示了最佳无人机高度随着水稻K因子的增加而增加，这意味着强烈的视线（LOS）条件。
Non-orthogonal multiple access (NOMA) is a promising multiple access technique for beyond fifth generation (B5G) cellular wireless networks, where several users can be served on a single time-frequency resource block, using the concepts of superposition coding at the transmitter and selfinterference cancellation (SIC) at the receiver. For terrestrial networks, the achievable performance gains of NOMA over traditional orthogonal multiple access (OMA) are well-known. However, the achievable performance of NOMA in aerial networks, compared to terrestrial networks, is not well-understood. In this paper, we provide a unified analytic framework to characterize the outage probabilities of users considering various network settings, such as i) uplink and downlink NOMA and OMA in aerial networks, and ii) uplink and downlink NOMA and OMA in terrestrial networks. In particular, we derive closed-form rate outage probability expressions for two users, considering line-of-sight (LOS) Rician fading channels. Numerical results validate the derived analytical expressions and demonstrate the difference of outage probabilities of users with OMA and NOMA transmissions. Numerical results unveil that the optimal UAV height increases with the increase in Rice-K factor, which implies strong line-of-sight (LOS) conditions.
