AI 中文总结
本文提出超表面波前弯曲（MWB）技术，通过增强辐射近场MU-MIMO系统的空间复用，降低用户信道相关性、提升频谱效率，还给出信道分析、合成流程及信道模型，并设计了三层透射式惠更斯超表面架构。
AI 中文摘要
本文引入超表面波前弯曲（MWB）以增强辐射近场多用户多输入多输出（MU-MIMO）系统中的空间复用。MWB通过增大球面波曲率，增强接收阵列上与距离相关的相位变化，降低用户间信道相关性并提升用户可分性。本文提出了依赖曲率的信道分析、MWB的广义片过渡条件（GSTC）合成流程及完整的超表面辅助MU-MIMO信道模型，评估了实用的通用轮廓方案与理想的用户特定基准。结果表明，MWB在频谱效率和有效信道秩方面实现了显著提升，最终提出了用于物理实现的三层透射式惠更斯超表面架构。
英文摘要
This paper introduces metasurface wavefront bending (MWB) to enhance spatial multiplexing in radiative nearfield multi-user multiple-input multiple-output (MU-MIMO) systems. By increasing spherical-wave curvature, MWB strengthens range-dependent phase variations across the receiver array, reduces inter-user channel correlation and improves user separability. The paper develops a curvature-dependent channel analysis, a generalized-sheet-transition-condition (GSTC) synthesisprocedure for MWB and a complete metasurface-assisted MUMIMO channel model. Both a practical common-profile scheme and an ideal user-specific benchmark are evaluated. The results demonstrate that MWB provides substantial improvements in spectral efficiency and effective channel rank. Finally, a threelayer transmissive Huygens metasurface architecture is proposed for physical implementation.
Comments15pages
