标题： 非正交多址接入辅助上行波束成形系统的和速率最大化 显示英文标题

标题： Sum Rate Maximization for NOMA-Assisted Uplink Pinching-Antenna Systems

摘要： 本文研究了一种上行通信场景，在这种场景中，多个用户通过采用非正交多址接入（NOMA）的接入点（AP）进行通信。在AP处部署了一种可以在电介质波导任意位置激活的夹持天线，用于动态重新配置用户信道。目标是通过联合优化夹持天线的位置和用户的发射功率来最大化系统总速率。所制定的优化问题是非凸的，并使用粒子群优化（PSO）算法解决。为了进行性能基准测试，考虑了两种时分多址接入（TDMA）方案：一种基于每个用户单独激活夹持天线，另一种基于单个夹持天线配置服务于所有用户。数值结果表明，与传统天线架构相比，使用夹持天线显著提高了系统总速率。此外，基于NOMA的方案在使用单个夹持天线时优于基于TDMA的方案，但在夹持天线为每个用户自适应配置时被基于TDMA的方法超越。最后，提出的基于PSO的方法对于具有共同夹持天线配置的NOMA和TDMA都显示出接近最优的性能。 显示英文摘要

摘要： In this paper, we investigate an uplink communication scenario in which multiple users communicate with an access point (AP) employing non-orthogonal multiple access (NOMA). A pinching antenna, which can be activated at an arbitrary point along a dielectric waveguide, is deployed at the AP to dynamically reconfigure user channels. The objective is to maximize the system sum rate by jointly optimizing the pinching-antenna's position and the users' transmit powers. The formulated optimization problem is non-convex, and addressed using the particle swarm optimization (PSO) algorithm. For performance benchmarking, two time division multiple access (TDMA) schemes are considered: one based on the pinching antenna individually activated for each user, and the other based on the single-pinching-antenna configuration serving all users. Numerical results demonstrate that the use of the pinching antenna significantly enhances the system sum rate compared to conventional antenna architectures. Moreover, the NOMA-based scheme outperforms the TDMA-based scheme with a single pinching antenna but is outperformed by the TDMA-based approach when the pinching antenna is adaptively configured for each user. Finally, the proposed PSO-based method is shown to achieve near-optimal performance for both NOMA and TDMA with a common pinching-antenna configuration.