近场双均匀平面阵列（UPA）通信：一种广义几何方法
Near-Field Dual-UPA Communications: A Generalized Geometric Approach
浏览论文内容
中文总结 AI 辅助
本文针对配备双UPA的近场MIMO通信系统，提出广义几何模型推导NF-FF边界并分解信道矩阵，实现低复杂度近场波束成形，其性能接近最优且复杂度低于现有方法。
中文摘要 AI 辅助
本文研究配备双均匀平面阵列（UPA）的近场（NF）多输入多输出（MIMO）通信系统。我们首先开发了一种广义几何模型，用于计算收发器面板上任意天线单元之间的三维距离。利用该距离分析，我们推导了双UPA配置的闭式近场到远场（NF-FF）边界。通过利用UPA的几何结构，我们进一步将近场信道矩阵分解为两个低维矩阵的克罗内克积。这种分解支持以可实现速率最大化为目标的低复杂度近场波束成形设计。数值结果验证了该分析，并表明传统的瑞利距离是该广义模型的一个特例。此外，与最先进的近场波束成形方法相比，所提出的波束成形设计实现了接近最优的速率性能，同时显著降低了计算复杂度。
英文摘要
This paper investigates a near-field (NF) multiple-input multiple-output (MIMO) communication system equipped with dual uniform planar arrays (UPAs). We first develop a generalized geometric model to calculate the 3D distance between arbitrary antenna elements across the transmitter and receiver panels. Leveraging the distance analysis, we derive a closed-form near-field to far-field (NF-FF) boundary for dual-UPA configurations. By exploiting the geometric structure of the UPAs, we further decompose the near-field channel matrix into a Kronecker-product of two lower-dimensional matrices. This decomposition enables a low-complexity NF beamforming design for achievable-rate maximization. Numerical results validate the analysis and demonstrate that the conventional Rayleigh distance is a special case of the generalized model. Furthermore, the proposed beamforming design achieves near-optimal rate performance while significantly reducing the computational complexity compared to state-of-the-art NF beamforming methods.
