This kinda reminds me of a technique for communicating within the WiFi frequency spectrum by "backscattering" some existing waves (as I understand it). Can be u

This kinda reminds me of a technique for communicating within the WiFi frequency spectrum by "backscattering" some existing waves (as I understand it). Can be used by non-electrical devices IIRC. It's interesting how we're able to exploit signal overlap - which seems to be how this works. Disclaimer: I haven't actually read the paper yet.