Large-Scale Parameters of Spatio-Temporal Short-Range Indoor Backhaul Channels at 140 GHz

TL;DR

This study measures large-scale parameters of indoor 140 GHz backhaul channels in shopping malls and airports, showing good agreement with 3GPP models for new radios, with some deviations in airport scenarios.

Contribution

Provides the first measurement-based large-scale parameter estimates for 140 GHz indoor backhaul channels, extending existing models beyond 100 GHz.

Findings

Estimated parameters match 3GPP models in shopping malls.

Deviations observed in airport scenarios.

Supports 3GPP model applicability up to 140 GHz.

Abstract

The use of above-100 GHz radio frequencies would be one of promising approaches to enhance the fifth-generation cellular further. Any air interface and cellular network designs require channel models, for which measured evidence of largescale parameters such as pathloss, delay and angular spreads, is crucial. This paper provides the evidence from quasi-static spatiotemporal channel sounding campaigns at two indoor hotspot (InH) scenarios at 140 GHz band, assuming short-range backhaul connectivity. The measured two InH sites are shopping mall and airport check-in hall. Our estimated omni-directional large-scale parameters from the measurements are found in good match with those of the Third Generation Partnership Project (3GPP) for new radios (NR) channel model in InH scenario, despite the difference of assumed link types and radio frequency range. The 3GPP NR channel model is meant for access links and said to be valid up to 100 GHz, while our measurements cover shortrange backhaul scenarios at 140 GHz. We found more deviation between our estimated large-scale parameters and those of the 3GPP NR channel model in the airport than in the shopping mall.