GNU Radio

GNU Radio is a free graphical programming development toolkit that provides digital signal processing for software-defined radios and signal-processing systems. It can be used with external RF hardware to create software-defined radios, or without hardware in a simulation-like environment. It is widely used in hobbyist, academic, and commercial environments to support both wireless communications research and real-world radio systems. It was orignally written by Eric Blossom in C++, python in 2001.

Using this powerful open-source software, we had the ability to perform digital processing on the received signal and demodulate it. The simple code written was for receiving and processing FM signal in the VHF range and demodulating it. The processed signal is then sent to the audio sink block.

[TODO: detailed explanation of the inner workings to come. Alternatively, you can pitch in your contribution if you do understand it]