https://www.thethingsnetwork.org/docs/lorawan/rssi-and-snr/ https://www.thethingsnetwork.org/docs/lorawan/rssi-and-snr/ > If the RSSI is below the noise floor,

https://www.thethingsnetwork.org/docs/lorawan/rssi-and-snr/ https://www.thethingsnetwork.org/docs/lorawan/rssi-and-snr/ > If the RSSI is below the noise floor, it is impossible to demodulate the signal. However, LoRa can demodulate signals that are below the noise floor.