宽带RIS辅助太赫兹链路中的波束斜视与孔径-带宽限制
Beam Squint and Aperture--Bandwidth Limitations in Wideband RIS-Assisted THz Links
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中文总结 AI 辅助
本文针对宽带RIS辅助太赫兹链路，在波束斜视和有限分辨率相位控制下，推导了信道矩和遍历速率的闭式近似，并揭示了孔径-带宽限制，经蒙特卡洛模拟验证。
中文摘要 AI 辅助
本文分析了在波束斜视和有限分辨率相位控制下，宽带可重构智能表面（RIS）辅助太赫兹链路的遍历速率。RIS辅助的两跳链路上的独立瑞利衰落产生双瑞利级联幅度。通过结合频率相关的阵列响应和相位量化误差，推导了精确的二阶和四阶信道矩。矩匹配随后为每个子载波上的接收功率提供了伽马近似，并为宽带遍历速率提供了易处理的闭式近似。一阶零点带宽近似表征了频率平坦RIS控制的孔径-带宽限制。蒙特卡洛模拟验证了分析框架。
英文摘要
This paper analyzes the ergodic rate of a wideband reconfigurable intelligent surface (RIS)-assisted terahertz link under beam squint and finite-resolution phase control. Independent Rayleigh fading on the two RIS-assisted hops produces double-Rayleigh cascaded amplitudes. Exact second- and fourth-order channel moments are derived by incorporating the frequency-dependent array response and phase-quantization errors. Moment matching then provides a Gamma approximation for the received power on each subcarrier and a tractable closed-form approximation for the wideband ergodic rate. A first-null bandwidth approximation characterizes the aperture--bandwidth limitation of frequency-flat RIS control. Monte Carlo simulations validate the analytical framework.
发表机构
- University of Nottingham Ningbo China（诺丁汉大学宁波校区）
机构由 AI 辅助整理，请以论文原文为准。
