LoRa® is the physical layer or the wireless modulation utilized to create the long
range communication link. Many legacy wireless systems use frequency shifting
keying (FSK) modulation as the physical layer because it is a very efficient
modulation for achieving low power. LoRa® is based on chirp spread spectrum
modulation, which maintains the same low power characteristics as FSK modulation
but significantly increases the communication range. Chirp spread spectrum
has been used in military and space communication for decades due to the long
communication distances that can be achieved and robustness to interference, but
LoRa® is the first low cost implementation for commercial usage.