This thesis is situated in the field of Global Navigation Satellite Systems (GNSS), with a specific focus on the “Lunar GNSS Receiver Experiment” (LuGRE). LuGRE, a pioneering joint venture between the National Aeronautics and Space Administration (NASA) and the Agenzia Spaziale Italiana (ASI), aims to demonstrate positioning, navigation, and timing (PNT) capabilities on the lunar surface. The work was developed under the guidance of Professor Fabio Dovis, Dr. Andrea Nardin, and Dr. Oliviero Vouch, within the Navigation Signal Analysis and Simulation research group (NavSAS) at Politecnico di Torino. While GNSS technologies have been primarily developed and optimized for terrestrial applications, the GNSS signal also propagates beyond the Earth, making it potentially useful for space segment applications, including deep space missions.