Rodríguez Corbo, Fidel AlejandroCelaya Echarri, MikelShubair, Raed M.Falcone Lanas, FranciscoAzpilicueta Fernández de las Heras, Leyre2024-09-272024-09-272024Rodríguez-Corbo, F. A. Celaya-Echarri, M., Shubair, R. M., Falcone F., Azpilicueta L. (2024. An acceleration approach for channel deterministic approaches based on quasi-stationary regions in V2X communications. IEEE Transactions on Vehicular Technology, 1-13. https://doi.org/10.1109/TVT.2024.3449768.0018-954510.1109/TVT.2024.3449768https://academica-e.unavarra.es/handle/2454/51847Vehicular environments are characterized by a high mobility, which alongside with the presence of abundant dynamic scatterers, lead to vehicular communication channels to be intrinsically non-stationary. In this sense, the quasi-stationary regions (QSRs) can assess the degree of non-stationarity within a determined scenario, and ultimately assist geometrical models to increase channel sampling intervals or to develop more efficient hybrid stochastic-geometric channel models. In this work, the channel QSRs in a vehicular communication (V2X) generic highdense urban environment at millimeter wave (mmWave) frequencies (28 GHz) have been analyzed using different approaches, such as the extended channel response into a Doppler-delay domain or the shadow fading spatial auto-correlation function (SF ACF) methodology. Then, the QSRs have been used as sampling distance in an in-house developed three-dimensional ray-launching (3D-RL) algorithm as an acceleration approach. The time variant channel features have been extracted and compared with the full resolution approach, obtaining consistent results when considering the QSR sampling distances, while decreasing by 83.30% the simulation computational time for the Doppler-delay approach, and 92.86% for the SF ACF method.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 workNon-stationary3D ray-launchingQuasistationary regionsGeometric channel modelsVehicular communicationsmmWaveV2Xinfo:eu-repo/semantics/article2024-09-27info:eu-repo/semantics/openAccess