Seeing the world in radio waves with the QuadRF
The QuadRF project introduces a phase-coherent four-channel software-defined radio (SDR) designed to make radio direction finding accessible to hobbyists. It uses a Raspberry Pi 5 and FPGA hardware to visualize radio signals in real-time.
Why it matters
This hardware lowers the barrier to entry for advanced radio frequency analysis and signal mapping.
Although the basic principle of radio direction finding is easy to understand (measure the phase difference between different antennas, then calculate the angle of arrival from this difference), the radio hardware to actually implement this has historically been hard for hackers to access. The QuadRF project aims to change this by building a phase-coherent four-channel SDR which makes direction mapping easy ( GitHub repository ).
The article is a technical overview of a hardware project with no political or social bias.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in