Overview
In an SDR, functions like modulation, demodulation, filtering, and frequency selection are performed by software on a computer or embedded system. This allows a single piece of hardware to support many different radio standards (Wi-Fi, Bluetooth, LTE, Satellite, etc.) simply by changing the software.
Key Components
- RF Front End: The hardware that receives/transmits the actual radio waves.
- ADC/DAC: Converts between analog radio signals and digital data.
- Digital Signal Processing (DSP): The software that performs the radio functions.
Importance
SDR is a critical technology for modern wireless networking, enabling flexible and upgradeable radio systems and fostering innovation in areas like cognitive radio.