夹捏天线辅助的全双工通信系统
Pinching Antenna-Assisted Full-Duplex Communication Systems
- Southwest Jiaotong University（西南交通大学）
- Southern University of Science and Technology（南方科技大学）
- Aristotle University of Thessaloniki（塞萨洛尼基亚里士多德大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
针对全双工通信中自干扰抑制难题，提出夹捏天线系统辅助的FD架构，通过动态调整天线位置与波束赋形协同，联合优化天线位置、波束赋形和功率分配，显著提升和速率并有效抑制自干扰。
AI中文摘要：
全双工（FD）通信在理论上可使频谱效率翻倍。尽管具有这一潜力，其实际性能主要受到严重的自干扰（SI）和同信道干扰的限制。此外，传统的固定天线阵列受限于空间灵活性不足，导致在SI抑制方面缺乏足够的空间隔离度。为解决这一问题，本文提出了一种由夹捏天线系统（PASS）辅助的FD架构。通过动态调整发射和接收天线位置，该系统能够实现大规模信道重构，从而与基站（BS）波束赋形协同作用，以抑制SI并增强期望信号的接收。为展示PASS在FD通信中的潜力，我们构建了一个加权和速率最大化问题，该问题联合优化天线位置、BS波束赋形和功率分配。为求解这一非凸问题，我们利用加权最小均方误差（WMMSE）框架对其进行重构，并开发了一种高效的交替优化（AO）算法，以迭代更新优化变量。仿真结果表明，所提出的PASS辅助FD架构显著优于传统固定天线阵列，在有效缓解SI以实现FD运行的同时，获得了可观的速率增益。
英文摘要：
Full-duplex (FD) communication theoretically doubles spectral efficiency. Despite this potential, its practical performance is primarily constrained by severe self-interference (SI) and co-channel interference. Moreover, conventional fixed antenna arrays suffer from limited spatial flexibility, resulting in insufficient spatial isolation for SI suppression. To address this issue, this letter proposes an FD architecture assisted by pinching antenna systems (PASS). By dynamically adjusting transmit and receive antenna positions, the system enables large-scale channel reconfiguration, thereby synergizing with the base station (BS) beamforming to suppress SI and enhance the desired signal reception. To demonstrate the potential of PASS for FD communication, we formulate a weighted sum-rate maximization problem that jointly optimizes antenna positions, BS beamforming, and power allocation. To tackle this non-convex problem, we reformulate it using the weighted minimum mean square error (WMMSE) framework and develop an efficient alternating optimization (AO) algorithm to iteratively update the optimization variables. Simulation results reveal that the proposed PASS-assisted FD architecture significantly outperforms conventional fixed antenna arrays, achieving substantial sum-rate gains while effectively mitigating SI to enable FD operation.
