Terahertz Channel Performance in Snowfall

This paper explores the propagation characteristics of terahertz (THz) waves in snowy conditions, a critical consideration for the advancement of future wireless communication systems, especially in the realm of 6G networks. Conducted at the Beijing Institute of Technology, our study utilizes a measurement-based approach, complemented by theoretical models, to assess the impact of snow on THz channel performance. The research employs a stationary point-to-point channel configuration at 140 GHz under varying weather conditions. Our findings reveal that the scattering effects of snow on THz wave propagation are surprisingly negligible, with cumulative distribution function (CDF) analysis in both clear and snowy conditions following a Rician distribution. Furthermore, our study challenges the applicability of the ITU model for THz frequencies, suggesting the Mie scattering theory with the Joss distribution as a more accurate alternative. The bit error rate (BER) performance, evaluated under different modulation schemes, indicates the viability of traditional modulation techniques in snowy environments. These insights not only enhance the understanding of THz wave behavior in adverse weather conditions but also provide valuable guidelines for the design of resilient THz communication systems, marking a significant step forward in the field of wireless technology.