Non-Line of Sight LoRa –Based Localization using RSSI-Kalman-Filter and Trilateration

Thirafi Wian Anugrah,Andrian Rakhmatsyah,Aulia Arif Wardana

doi:10.21108/ijoict.2020.00.495

Abstract

<span>The method that analyzes in this research is the combination of the Received Signal Strength Indicator (RSSI) with the Trilateration Method. This research also filtered the RSSI value using the Kalman filter method for smoothing data. The localization system traditionally based on Global Positioning System (GPS) device. However, GPS technology not working well in Non-line-of-sight (NLOS) like an indoor location or mountain area. The other way to implement the localization system is by using LoRa technology. This technology used radio frequency to communicate with each other node. The radiofrequency has a measurement value in the form of signal strength. These parameters, when combined with the trilateration method, can be used as a localization system. After implementation and testing, the system can work well compared with the GPS system for localization. RMSE is used to calculate error distance on these methods, the result from three methods used, the value from RSSI with Kalman filter have a close result to actual position, then value GPS follows with close result from Kalman filter, and the last one is RSSI without Kalman filter.</span>

Highlights

The usage of LPWAN in recent years is rising for communication across the sensor node in Wireless Sensor Network (WSN) technology [1] Low-Power Wide-Area Network (LPWAN) is radio frequency technology that can transmit long-range signals for wide area coverage using low power resources
This research succeeded in applying the localization system for NLOS environment using combination of the filtered using Kalman Filter, Received Signal Strength Indicator (RSSI) method and trilateration method in Long Range (LoRa) Network on NLOS area
This research proof that LoRa is suitable for localization system in NLOS environment, with the condition as showed at fig 3 that all areas covered by LoRa network signal

Summary

Introduction

The usage of LPWAN in recent years is rising for communication across the sensor node in Wireless Sensor Network (WSN) technology [1] Low-Power Wide-Area Network (LPWAN) is radio frequency technology that can transmit long-range signals for wide area coverage using low power resources. This feature is very powerful for indoor or outdoor communication protocol with a wide area and many obstacles [2]. Each topology has a gateway that used to get all data from all nodes that connect in LoRa Network.

Methods

Results

Conclusion