From near field to long range communication, ATDI is making radio systems do their job.
ATDI has just turned the spotlight on its work with low-power, long-distance machine-to-machine (M2M) connections under the LoRa protocol with an explanatory online article: http://tinyurl.com/h38prha
LoRa is the physical layer or the wireless modulation used 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.
The advantage of LoRa is in the technology’s long range capability. A single gateway or base station can cover entire cities or hundreds of square kilometers. Range highly depends on the environment or obstructions in a given location, but LoRa has a link budget greater than any other standardised communication technology.
“The technology is very attractive for M2M and Internet of things (IoT) applications where low power characteristics are key. An example use might be for domestic electricity meter readings which can be done remotely and without the time-consuming process of somebody visiting the premises,” says ATDI operations director Paul Grant. “The challenge, of course, is to make the radio link fit into the available spectrum – particularly in a crowded urban environment – which is why the online article is so useful in showing how our planning and modelling software suite can be used to ensure there are no problems with interference.”