Indoor-Office Large-Scale Wireless Channel Characterization in cmWave/FR3 Spectrum
O. Kanhere, K. F. Nieman, S. S. Ghassemzadeh
TL;DR
This work addresses the need for accurate indoor FR3 (cmWave) channel models in Indoor Hotspot scenarios by performing a high‑resolution measurement campaign across 6.9, 8.3, and 14.5 GHz in a four‑floor office building. A flexible FR3 channel sounder captures path loss, shadow fading, RMS delay spread, and angular spreads over 653 locations, enabling a direct comparison of LOS and NLOS conditions. Key contributions include a two‑slope large‑scale fading model with $PL(d)=PL_0+10\,PLE\log_{10}(d/d_0)+S$, $S\sim\mathcal{N}(0,\sigma_S)$; log-normal fits for $\log_{10}(\tau_{rms}/1\mathrm{s})$; an ASA distribution that is log-normal and a ZSA distribution with two modes near $10^{\circ}$ and $13^{\circ}$; and a detailed map of inter‑parameter and inter‑frequency cross‑correlations. These results support refined InH FR3 channel models and have direct implications for indoor network design and performance in cmWave deployments.
Abstract
This paper presents comprehensive findings on the characterization of Indoor Hotspot channel parameters, derived from an extensive experimental campaign conducted at 6.9, 8.3, and 14.5 GHz in a commercial office building. Extensive measurements were carried out in diverse indoor office settings, including cubicles, conference rooms, hallways, and laboratory spaces across four floors. The path loss, shadow fading, delay spread, and angular spread was modeled. Our results offer significant insights into the attenuation and dispersion characteristics of wireless signals in diverse indoor settings in the centimeter-wave frequency band, and can be used for improving indoor network design and performance in commercial buildings.