论文标题
多用户XL-MIMO Systems中的物理层安全性泄漏子空间预编码和安排
Leakage Subspace Precoding and Scheduling for Physical Layer Security in Multi-User XL-MIMO Systems
论文作者
论文摘要
我们研究了多用户XL-MIMO系统中可实现的保密总和，在该系统上，用户到基站的距离与天线阵列尺寸相当。我们表明，考虑这些设置固有的球形波前传播对物理层安全是有益的，因为它提供了针对位于类似角度方向的窃听者的免疫力，否则这些方向否则可以防止在经典的Planar-Wavefront繁殖中进行安全通信。还提出了用于关节安全的预编码和用户调度的泄漏子空间预编码策略，该策略可以改善与常规的零型策略相比，在不同的窃听串联串谋策略下，与常规的零福利策略相比。
We investigate the achievable secrecy sum-rate in a multi-user XL-MIMO system, on which user distances to the base station become comparable to the antenna array dimensions. We show that the consideration of spherical-wavefront propagation inherent to these set-ups is beneficial for physical-layer security, as it provides immunity against eavesdroppers located in similar angular directions that would otherwise prevent secure communication under classical planar-wavefront propagation. A leakage subspace precoding strategy is also proposed for joint secure precoding and user scheduling, which allows to improve the secrecy sum-rate compared to conventional zero-forcing based strategies, under different eavesdropper collusion strategies.
