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http://dx.doi.org/10.7471/ikeee.2011.15.1.076

A Study On RTLS(Real Time Location System) Based on RSS(Received Signal Strength) and RSS Characteristics Analysis with the External Factors  

Lee, Seung-Ho (Department of Electronic Engineering, Hanbat National University)
Publication Information
Journal of IKEEE / v.15, no.1, 2011 , pp. 76-85 More about this Journal
Abstract
In this paper, we analysed RSS characteristics by external factors and presented an efficient algorithm for real-time location tracking and its hardware system. The proposed algorithm enhanced the ranging accuracy using Kalman Filter based on the RSS DB. The location tracking system that consists of the tag, AP(Access Point), a data collector(Data Receiver) with IEEE 802.15.4(ZigBee) network environment, and location tracking application that reveal locations of each tag is implemented for the test environment. The location tracking system presented in this paper is implemented with MSP430 microprocessor manufactured by TI(Texas Instrument), CC2420 RF chipset and the location tracking application. With the results of the experiment, the proposed algorithm and the system can achieve the efficiency and the accuracy of location tracking with the average error of 19.12cm, and its standard deviation of 5.31cm in outdoor circumstance. Also, the experimental result shows that exact tracking of position in indoor circumstance cannot achieve because of vulnerable RSS with external circumstance.
Keywords
RSS(Received Signal Strength); IEEE 802.15.4(ZigBee); MSP430; CC2420; RF chipset; USN(Ubiquitous Sensor Network);
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