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In order to investigate the driving of the QBO a high-resolution, convection-permitting run of the ICON model with 5km grid spacing was performed. Neither convection nor gravity waves (GWs) were parametrized. Here we analyze the resolved GWs in the model data by applying a small-volume sinusoidal fit method (S3D). By using a cascade of cube sizes, horizontal wavelengths of 150km - 2000km are addressed. This acts as a compromise between spectral resolution and spatial location. Phase speed spectra and gravity wave momentum flux (GWMF) can be reconstructed for individual regions and single snap-shots. Via the comparison of phases from wave fits of temperature and winds, the vertical propagation direction of individual waves can be separated and ray-tracing can be initialized accordingly. Using the results of this analysis we study the effect of the critical level GW filtering by comparing the vertical variation of phase speed spectra by means of blocking diagrams. Despite the generally good agreement, GWs with unexpected phase speeds at given altitudes due to critical level filtering are present. Multiple potential reasons are identified. Ray-tracing studies are carried out to investigate the potential influence of these various processes and quantify deviations from simple propagation and filtering assumptions used in GW parametrizations. The origin of these GWs is investigated and the regional variation of the blocking due to wind filtering is studied in more detail. Further, a ray-tracing is initialized using the results to improve the understanding of the role of horizontal GW propagation when compared to GW parametrization., The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)