Aksoy, EnesSchultze, AlperFazli, AbdolvakilRaschkowski, LeszekAzpilicueta Fernández de las Heras, LeyreCelaya Echarri, MikelNavarro Cía, MiguelStanczak, Slawomir2025-08-122025-08-122025-03-11Aksoy, E., Schultze, A., Fazli, A., Raschkowski, L., Azpilicueta, L., Celaya-Echarri, M., Navarro-Cía, M., Stanczak, S. (2024). Analysis of interaction mechanisms and intercomparison of raytracing tools for optimizing THz simulations. In [IEEE], 2024 IEEE Global Communications Conference (GLOBECOM 2024) (pp. 2190-2195). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOBECOM52923.2024.10901773.979-8-3503-5126-210.1109/GLOBECOM52923.2024.10901773https://academica-e.unavarra.es/handle/2454/54658This paper quantifies the weight of the different physical mechanisms (reflection, diffraction, and scattering) in a typical indoor THz wireless communication environment and provides an intercomparison of raytracing tools. Two state-of-the-art raytracing tools - Wireless InSite and Sionna - are utilized to analyze the capabilities of currently available open-source and commercial raytracing engines for THz simulations. A channel sounder measurement campaign at 300 GHz was conducted in a conference room at Fraunhofer HHI, which is used to validate the raytracing simulations. Additionally, the measurements are compared to a proprietary raytracer, optimized for THz simulations. This paper presents a guideline to increase the capabilities of state-of-the-art raytracing tools, to obtain good results for high frequency simulations. The comparisons show, that currently used raytracing tools are not sufficiently accurate for THz simulations. However, these inaccuracies can be mitigated by the implementation of new features, such as the inclusion of different scattering mechanisms and the incorporation of atmospheric attenuation, while utilizing precise geometry and accurate material parameter models.application/pdfeng© 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.Interaction mechanismsPropagation channelsRaytracingTHz communicationsinfo:eu-repo/semantics/conferenceObject2025-08-12info:eu-repo/semantics/openAccess