Technical Breadth and Depth of LoRa Technology
Tallal Elshabrawy (German University in Cairo, Egypt)
In the new era of the Internet-of-Things (IoT), communication technologies have become an integral constituent of a multitude of applications within smart cities, such as environmental monitoring, waste management, traffic control, and smart metering, just to name a few. Recently, Low Power Wide Area Networks (LP-WAN) have been evolving to become a key enabler for the realization of such types of city-wide applications with dense IoT devices. LP-WAN are typically configured as star-of-star networks. Within each underlying star network, thousands of power-constrained IoT end-devices communicate directly with an IoT gateway over long distances at the scale of kilometers. LoRa has been exhibiting tremendous commercial growth to establish itself among the front runners of emerging LP-WAN, where the number of countries with LoRaWAN deployments has surpassed more than 140 countries. LoRa is pillared on its patented chirp spread spectrum modulation that supports energy-efficient/reliable long-range communication.
The aim of this tutorial is to provide an introductory practical insight to the LoRa technology. Within the scope of the tutorial, the fundamentals of the patented LoRa chirp spread spectrum modulation will be explained. This is followed by an explanation of the practical transmission and reception of LoRa signals using software defined radio.