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Next-generation wireless networks will leverage the spectrum above 100 GHz toenable ultra-high data rate communications over multi-GHz-wide bandwidths. Thepropagation environment at such high frequencies, however, introduceschallenges throughout the whole protocol stack design, from physical layersignal processing to application design. Therefore, it is fundamental todevelop a holistic understanding of the channel propagation and fadingcharacteristics over realistic deployment scenarios and ultra-wide bands. Inthis paper, we conduct an extensive measurement campaign to evaluate the impactof weather conditions on a wireless link in the 130-150 GHz band through achannel sounding campaign with clear weather, rain, and snow in a typical urbanbackhaul scenario. We present a novel channel sounder design that capturessignals with -82 dBm sensitivity and 20 GHz of bandwidth. We analyze linkbudget, capacity, as well as channel parameters such as the delay spread andthe K-factor. Our experimental results indicate that in the considered contextthe adverse weather does not interrupt the link, but introduces some additionalconstraints (e.g., high delay spread and increase in path loss in snowconditions) that need to be accounted for in the design of reliable SixthGeneration (6G) communication links above 100 GHz.

Terahertz Communications Can Work in Rain and Snow: Impact of Adverse Weather Conditions on Channels at 140 GHz