Imagine you are creating a robot that needs to move around without bumping into anything. The robot needs a special device called a GPS (global positioning system) to know where it is and where it needs to go.
A GPS software-defined receiver is like a super smart version of this device. It uses software, which is like a set of instructions, to process information from satellites that orbit around the Earth. These satellites send signals to the GPS receiver, which then uses the software to determine its exact location on Earth.
So, with a GPS software-defined receiver, the robot can move around without bumping into anything because it knows where it is, where it needs to go, and how to get there without crashing into things. Just like how you use a map to help you find your way to a friend's house, the GPS software-defined receiver uses software to find its way around.