IoT Link Budget Survey for Sub-Gigahertz Field Area Networks

This paper aims to present a model of coverage prediction in external environments between low power IoT devices communicating via radio frequency at 915 MHz. This paper investigates the IoT nodes' communication and performance according to the distance between them. Modifications in Friis Transmission Equation were introduced to achieve the goals through statistical analysis of measurement results. In addition, this model will aid the development of IoT applications and solutions in outdoor environments.