Problem
Research questions and friction points this paper is trying to address.
Beam Squint
Wideband RIS
THz Links
Ergodic Rate
Phase Control
Beam Squint and Aperture--Bandwidth Limitations in Wideband RIS-Assisted THz Links
🤖 AI Summary
本文研究了在波束倾斜和有限分辨率相位控制下，宽带RIS辅助太赫兹链路的遍历速率问题，并通过精确推导信道矩及蒙特卡洛仿真验证了解析框架。
📝 Abstract
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.
Innovation
Methods, ideas, or system contributions that make the work stand out.
Beam Squint
Phase Quantization Errors
Ergodic Rate
Gamma Approximation
Aperture-Bandwidth Limitation
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2024-03-05Citations: 0
