Estimating of target coordinates based on Trilateration technique for indoor localization

Abstract

Due to multipath and interference issues, implementing a localization system for an indoor environment has faced further challenges. Receive Signal Strength (RSS) and Time of Arrival (ToA) are the most important techniques used for such environments in this area, which need to be strengthened, especially for further interference due to enormous multipath problems. In this paper, in order to apply the suggested approach of this analysis, a case study of a chosen building is chosen. This suggestion is based on the Technique of Trilateration. To simulate the case study area, the Wireless Insite Software (WIS) was used, in such a proposal, 30 Receivers (RXs), and 3 Transmitters (TXs) deployed in suitable locations. After measuring RSS and ToA and save them into the database then, by using MATLAB software, the coordinates of RXs are calculated. The results confirm that the estimated locations are closed to the real locations by the average error of (0.49) meter for X-coordinate and (0.45) meter for Y-coordinate based on RSS, while the average error (0.55) meter for X-coordinate and (0.59) meter for Y-coordinate based on ToA. From this, we conclude that the RSS approach is more effective in evaluating indoor localization than the ToA method in the Trilateration method.