The world around us hums with invisible signals, carrying everything from our favorite radio tunes to crucial communication data. At the heart of many of these wireless technologies lies the elegant ...

As you might expect, the University of Puerto Rico at Arecibo has a fascination with radio signals from space. While doing research into the legendary “Wow! Signal” detected back in 1977, they ...

Have you ever wondered what’s happening in the invisible world of radio waves all around us? From the music playing on your favorite FM station to the Wi-Fi signals powering your internet connection, ...

Modern SDRs evolve from configurable platforms into intelligent wideband sensing systems combining high dynamic range, ...

Editor’s Note: This is a two-part series where DI authors Damian and Phoenix Bonicatto explore IQ signal representation and negative frequencies to ease the understanding and development of SDRs. Part ...

There is a new breed of RF receivers known as software-defined radios, and they are revolutionizing the way in which people listen to shortwave (SW) radio, or indeed any form of radio broadcast. SDRs ...

Software Defined Radio (SDR) is the big thing these days, and why not? A single computer can get rid of a room full of boat anchors, and give you better signal discrimination than all but the best kit ...

What if you could broadcast signals across the globe using just a credit-card-sized computer and a handful of components? It might sound like a scene from a sci-fi novel, but with a Raspberry Pi and ...

Hobbyists who listen for distant signals often face a dilemma. The best places to hear distant “DX” signals are in remote and rural areas that are free of electrical interference. Unfortunately, many ...

This is a two-part series where DI authors Damian and Phoenix Bonicatto explore the IQ signal representation and negative frequencies. Part 1 explains the commonly used SDR IQ signal representation ...