Yes, but also no. Firstly, it's not a new idea. Folks use JS8call (formerly FT8call). It's quite sophisticated and can work even below the noise floor. Folks h

Yes, but also no. Firstly, it's not a new idea. Folks use JS8call (formerly FT8call). It's quite sophisticated and can work even below the noise floor. Folks have even gotten it to work in pretty ridiculous conditions. It has comically low bandwidth but works at comically low power. That said, the only place I think this would be "clandestine" is in urban environments where there is a lot of reflection. Modern electronics and antennas get the benefit of very high fidelity simulation, so finding a signal with professional gear (especially if it's cutting edge and understands modern maps) is pretty wild. I saw a demo of a very expensive system that used Google Earth as its UX a few years ago, and it could do some amazing things. Even in cluttered environments with low power transmitters, it still isn't very secretive. Amateur radio does this thing called "fox hunting" where they use a variety of handheld elements to quickly track down low power signals. Some of these contests get pretty technical, with the target transmitter being highly directional on some axis and deliberately casting false reflections, and lately they're entirely solar/lifepo4 so they're power constrainted. But folks with a bit of training and practice can find them really quick. If you want to be clandestine, then actually what you want to do is overlay your network over existing networks so that your traffic is difficult to isolate from a computationally infeasible flood.