The thesis has been carried out in the TT&C (Telemetry Tracking and Command) department of Telespazio company, at Fucino Space Center, with the goal of developing an SDR (Software Defined Radio) receiver able to process telemetry signals coming from in-orbit satellites. The project has been realized exploiting a National Instruments USRP (Universal Software Radio Peripheral) as hardware support, in particular the USRP-2920, and the free and open source ecosystem GNU Radio for software development in the form of signal processing blocks. The SDR approach is becoming increasingly popular in the field of communication systems thanks to its high level of flexibility, easy reconfigurability and reduced cost.