Dynamic System Based on RSSI for Indoor localization Using Multi-Bands

Abstract

Indoor Localization has recently drawn a lot of attention in research. It is essential for several sectors, such as monitoring objects placed in both indoor and outdoor environments. Therefore, several targets are located in the case study area to retrieve data. The main challenges in harsh indoor environments are the Non-Line-of-Sight (NLoS) and multipath propagations scenarios. To mitigate the aforementioned issue, several solutions are proposed besides the mathematical aspect. In this paper, a dynamic system with two bands is proposed to construct an accurate system. Such a system is carried out based on Received Signal Strength (RSS). Due to the numerous difficulties in the indoor environment and the diversity of environments within the interested area, dynamic systems were applied. The proposed system is carried out based on 2.4 GHz and 5 GHz. In the interested area, 20 targets were deployed in a planning manner. Using Net-Spot software, experimental RSS was measured by adopting both 2.4 GHz and 5 GHz. The target’s location is determined by using the trilateration method applied. The appropriate parameters for each area in the case study area, the parameters were chosen based on the desired location. The main aspects taken into consideration is the number of walls and distances between targets and transmitters. As a result, 5 GHz is better than 2.4 GHz in short distances and vice versa. At distances under 20m, 5 GHz is better than 2.4 GHz. Furthermore, 5 GHz is suffer in NLoS situation, so 2.4 GHz is recommended. By applying the proposed system, the obstacles in an indoor environment and in NLoS can be overcome by adopting a hybrid system based on two bands with a dynamic system since 2.4 GHz is better than 5 GHz.