LINK DESIGN FOR LOW POWER DIRECT ACCESS TO GEO SATELLITE BASED IoT SYSTEM

Abstract

The design of satellite communication system is a complex process requiring com promises between many factors to achieve the best performance at an acceptable cost. In the present world GEO satellites carry the vast majority of the world’s satellite traffic, therefore it becomes very important for the link designer to design for optimum utilization of space segment. Internet of Things (IoT) is developing at an impressive speed, and the range of applications for IoT is becoming wider. Long Range (LoRa) technology is currently one of the most promising terrestrial Low-Power Wide Area Network (LPWAN) technologies. LoRa technology has become popular candidate technology for IoT satellites. Its advantages are low power consumption, inexpensive equipment and most importantly, appropriate for long range communication. In this work datas of LoRa and GEO satellites are collected and with the help of link budget modelling, the effectiveness in establishing successful communication link between GEO satellite and IoT power class 1 device communicating in 2.4 GHz Industrial, Scientific, Medical (ISM) frequency band are evaluated. Findings indicated that for an orbital altitude up to 35000km communication with power class 1 device (35dBm) is feasible.