论文标题
无线网络的迭代电源控制，具有可分布的可重构智能表面
Iterative Power Control for Wireless Networks with Distributed Reconfigurable Intelligent Surfaces
论文作者
论文摘要
可重新配置的智能表面（RIS）是一种新的范式，借助明智的部署和对齐，可以实现更有利的传播环境和更好的无线网络设计。因此，他们可以为下一代无线系统提供许多潜在的好处，包括改进的覆盖范围，更好的干扰管理甚至安全性。在本文中，我们考虑了一个上行链路下一代无线系统，每个用户都可以使用RIS进行辅助。我们研究了这个分布式RIS辅助无线网络中的上行链路控制问题。具体而言，我们的目的是通过通过电源，接收器过滤器和RIS相位矩阵的联合设计在基站在每个用户在基站的可靠通信要求的所有用户的总上行链路传输电源最小化。我们提出了一种迭代功率控制算法，并结合了连续的凸近似技术，以通过非凸相约束来解决问题。数值结果表明，当直接链接较弱时，分布的RIS辅助会导致上行链路功率节省。
Reconfigurable Intelligent Surfaces (RIS) are a new paradigm which, with judicious deployment and alignment, can enable more favorable propagation environments and better wireless network design. As such, they can offer a number of potential benefits for next generation wireless systems including improved coverage, better interference management and even security. In this paper, we consider an uplink next generation wireless system where each user is assisted with an RIS. We study the uplink power control problem in this distributed RIS-assisted wireless network. Specifically, we aim to minimize total uplink transmit power of all the users subject to each user's reliable communication requirements at the base station by a joint design of power, receiver filter and RIS phase matrices. We propose an iterative power control algorithm, combined with a successive convex approximation technique to solve the problem with non-convex phase constraints. Numerical results illustrate that distributed RIS assistance leads to uplink power savings when direct links are weak.
