论文标题
用于未来无线电访问的混合NOMA：设计，潜力和局限性
Hybrid NOMA for Future Radio Access: Design, Potentials and Limitations
论文作者
论文摘要
下一代物联网（IoT）应用程序需要数万亿个低功率的无线移动设备，以相互连接具有超可稳定性和低延迟。非正交的多重访问（NOMA）是一项有前途的技术，可以通过在相同的正交资源块中容纳几个用户来解决5G及以后的大规模连通性。因此，本文探讨了在上行链路场景中由于其较高的光谱效率而在上行链路方案中进行大量多次访问的杂种诺玛（HNOMA）。 HNOMA由于实践中的多种通道条件，包括电源域和代码域Noma方法。我们强调，基于极地编码的数据传输可以在基于HNOMA的无线网络中实现更高的可靠性和较低的潜伏期。此外，由于非正交链接，在基站（BS）中，每个链接的通道状态信息（CSI）并非非常复杂，可以估算。因此，我们分析和审查在存在不完美CSI的情况下涉及HNOMA传播的基于上行链路的系统的性能。此外，我们总结了一些关键的技术挑战，以及使用HNOMA传输中的未来派IoT应用中的潜在解决方案。最后，我们使用深度学习方法为基于HNOMA的系统提供了一些设计指南，以实施适应性和高效的无线网络。
Next-generation internet of things (IoT) applications need trillions of low-powered wireless mobile devices to connect with each other having ultra-reliability and low-latency. Non-orthogonal multiple access (NOMA) is a promising technology to address massive connectivity for 5G and beyond by accommodating several users within the same orthogonal resource block. Therefore, this article explores hybrid NOMA (HNOMA) for massive multiple access in the uplink scenarios due to its higher spectral efficiency. The HNOMA includes both power domain and code domain NOMA method due to diverse channel conditions in practice. We highlight that polar coded based data transmission can achieve higher reliability and lower latency in HNOMA-based wireless networks. Further, at the base station (BS), channel state information (CSI) of each link is not perfectly available or very complex to estimate due to non-orthogonal links. Therefore, we analyze and review the performance of uplink based system involving HNOMA transmission in the presence of imperfect CSI. Furthermore, we summarize some key technical challenges as well as their potential solutions in futuristic IoT applications using HNOMA transmission. Finally, we offer some design guidelines for HNOMA-based systems using deep learning approach to implement adaptive and efficient wireless networks.
