Year: 2025
Type: article
Abstract: The terahertz (THz) band offers promising opportunities for high-capacity wireless communications but faces significant challenges from vegetation-induced channel impairments. This article presents a comprehensive investigation of THz channel propagation through vegetation, introducing a hybrid modeling approach that combines deterministic vegetation-dependent exponential decay (VED) modeling with statistical characterization of temporal variations. Through extensive laboratory measurements using Epipremnum aureum, we find that vegetation introduces angular-dependent power losses, with channel statistics following heavy-tailed Stable distributions rather than conventional Rician or Weibull models. Our outdoor measurements with dense and sparse lilac scenarios reveal pronounced foliage density variations in attenuation and height-dependent effects, while validating the VED model's ability to maintain excellent agreement with measured data and parameter stability across different heights without coefficient recalibration. Critical bit-error-rate (BER) analysis uncovers distinct SNR thresholds beyond which performance exhibits oscillatory behavior due to heavy-tailed fading, establishing fundamental capacity bounds with significant implications for modulation scheme selection and power control strategies in practical THz communication systems.
Authors: Jiayuan Cui, Yuheng Song, He Jiang, Chenxi Wang, Mingxia Zhang, Guohao Liu, Da Li, Jiabiao Zhao, Jiacheng Liu, Yue Su, Wenbo Liu, Peian Li, Daniel M. Mittleman, Fei Song, Jianjun Ma
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4410358685