P4XT Digital Multiplexing Transponder
Part of the AMSAT Phase 4 efforts to produce amateur-developed systems suitable for Geostationary Earth Orbit (GEO) deployment is the extremely interesting P4XT Digital Multiplexing Transponder project. The project scope also includes development of modems to operate through the transponder.
This is a truly epic project which doesn’t just touch but grabs hold of many of the principles of modern communications system design and systems engineering. If you want to get involved in something big or simply browse over something ambitious check this out!
Interested? Get in touch via the Open Research Institute