LoRa uses a proprietary spread spectrum modulation that is similar to and a derivative of chirp spread spectrum (CSS) modulation. Each symbol is represented by a cyclic shifted chirp over the bandwidth centered around the base frequency.
Typical LoRa modems support transmit powers up to +22 dBm.[7] However, the regulations of the respective country may additionally limit the allowed transmit power. Higher transmit power results in higher signal power at the receiver and hence a higher link budget, but at the cost of consuming more energy. There are measurement studies of LoRa performance with regard to energy consumption, communication distances, and medium access efficiency.[11] According to the LoRa Development Portal, the range provided by LoRa can be up to 3 miles (4.8 km) in urban areas, and up to 10 miles (16 km) or more in rural areas (line of sight).[12]
In addition, LoRa uses forward error correction coding to improve resilience against interference. LoRa's high range is characterized by high wireless link budgets of around 155 dB to 170 dB.
Range extenders for LoRa are called LoRaX.
me:
LoRas are really cool devices which use a special frequency to communicate with each other, meaning if done properly, they can be used as messaging devices for talking to other people, which is cool, but we want to use the internet.. which is why lInt is being made!
lInt
lInt (LoRa INTranet) is a system that is currently in development that allows LoRa devices to send web pages to each other, then be opened on a pc. it is very cool