论文标题
THZ-NOMA网络中的关节束管理和功率分配
Joint Beam Management and Power Allocation in THz-NOMA Networks
论文作者
论文摘要
本文研究了如何在Terahertz（THZ）网络中应用非正交多访问（NOMA）作为附加组件。特别是，在实施NOMA之前，假定存在一个旧式THZ系统，该系统已经配置为为旧用户提供空间梁。本文的目的是研究这些预配合的空间梁如何用作带宽资源的一种类型，在该资源上，可以在其中提供其他二级用户，而不会降低旧的主要用户的性能。关节束管理和功率分配问题首先被提出为混合组合非凸优化问题，然后通过两种具有不同性能复杂性权衡的方法解决，一个基于分支和界限方法，而另一种基于连续的凸近近似值。提出了分析结果和仿真结果，以说明THZ-NOMA网络中基于光束资源分配的新特征，还表明可以使用这些预配置的空间束来以光谱有效的方式改善系统吞吐量和连通性。
This paper investigates how to apply non-orthogonal multiple access (NOMA) as an add-on in terahertz (THz) networks. In particular, prior to the implementation of NOMA, it is assumed that there exists a legacy THz system, where spatial beams have already been configured to serve legacy primary users. The aim of this paper is to study how these pre-configured spatial beams can be used as a type of bandwidth resources, on which additional secondary users are served without degrading the performance of the legacy primary users. A joint beam management and power allocation problem is first formulated as a mixed combinatorial non-convex optimization problem, and then solved by two methods with different performance-complexity tradeoffs, one based on the branch and bound method and the other based on successive convex approximation. Both analytical and simulation results are presented to illustrate the new features of beam-based resource allocation in THz-NOMA networks and also demonstrate that those pre-configured spatial beams can be employed to improve the system throughput and connectivity in a spectrally efficient manner.
