Sigfox relies on * Ultra Narrow Band (100Hz) modulation * Low data rate (100 bits/s in Europe, at 14dBm/25mW) + lightweight protocol * High receiver sensitiv

Sigfox relies on * Ultra Narrow Band (100Hz) modulation * Low data rate (100 bits/s in Europe, at 14dBm/25mW) + lightweight protocol * High receiver sensitivity, mostly SDR based We've got a few youtube videos explaining this ... but mostly targeted for a generic audience. The "radio signal modulation" may have enough tech details to match what you're looking for : https://www.youtube.com/watch?v=gGvM6KEDIdE&index=6&list=PLcw1TnahFRW_EOHxnhEX9ETv3Sf4tUUfd https://www.youtube.com/watch?v=gGvM6KEDIdE&index=6&list=PLc... We're also working on a publication of a standard UNB IoT protocol, Sigfox being one of its implementations. Should come within a few weeks. There is a draft about the network architecture here : https://datatracker.ietf.org/doc/draft-zuniga-lpwan-sigfox-system-description/ https://datatracker.ietf.org/doc/draft-zuniga-lpwan-sigfox-s...