Yup. In fact, if you use a technique called spread spectrum emissions you can have your signal below the noise floor but have it still be possible to pick it up

Yup. In fact, if you use a technique called spread spectrum emissions you can have your signal below the noise floor but have it still be possible to pick it up because it carries so much redundant information across a massive bandwidth. https://en.wikipedia.org/wiki/Spread_spectrum https://en.wikipedia.org/wiki/Spread_spectrum I can't find much information about using SS to go below the noise floor on wikipedia but it is a thing.