In June 2021, the WIVERN (WInd VElocity Radar Nephoscope) mission has been selected to enter Phase 0 studies in the context of the 11th call of the ESA Earth Explorer program. The mission will provide novel observations of global winds, clouds and precipitation by a ground-breaking conically scanning dual-polarization Doppler W-band (94-GHz) radar. End-to-End (E2E) simulators represent critical tools to assess in-flight performances and support the consolidation of mission architecture and payload design and are essential during Phase 0 ESA studies and beyond. This dissertation describes the original work carried out to develop an E2E radar simulator tailored to the WIVERN mission, showcasing its capabilities for a case study of interest.