4. INTRODUCTION : Since its introduction in 1991, SDR (Software-defined Radio) has been defined as a radio platform of which the functionality is at least partially controlled or implemented in software.

5. Antenna – Receives data RF front end – Converting into the Intermediate Frequencies ADC/DAC – Analog to digital conversions DDC/DUC – Digital-up conversion and Digital-down conversion for modulation and demodulation Baseband Processing – implements the link layer protocol and performs other operations