A Polygonal Method for Ranging-Based Localization in an Indoor Wireless Sensor Network |
| |
Authors: | Jaesung Park Yujin Lim Kilhung Lee Yong-Hoon Choi |
| |
Affiliation: | (1) Department of Information and Communications, Gwangju Institute of Science and Technology, Gwangju, 500-712, South Korea;(2) Department of Computer Science, University of Illinois at Urbana-Champaign, Urbana-Champaign, IL 61801, USA |
| |
Abstract: | In this paper, we propose an indoor localization method in a wireless sensor network based on IEEE 802.15.4 specification.
The proposed method follows a ranging-based approach using not only the measurements of received signal strength (RSS) but
also the coordinates of the anchor points (APs). The localization accuracy depends on the errors in the distance estimation
with the RSS measurements and the size of the polygon composed of the APs used for the lateration. Since errors are inevitably
involved in the RSS measurement, we focus on reducing the size of the polygon to increase the localization accuracy. We use
the centroid of the polygon as a reference point to estimate the relative location of a target in the polygon composed of
the APs hearing the target. Once the relative position is estimated, only the APs covering the area are used for localization.
We implement the localization method and evaluate the accuracy of the proposed method in various radio propagation environments.
The experimental results show that the proposed method improves the localization accuracy and is robust against the dynamically
changing radio propagation environments over time. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|