A data fusion technique for wireless ranging performance improvement

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Ecway Technologies

A DATA FUSION TECHNIQUE FOR WIRELESS RANGING
PERFORMANCE IMPROVEMENT
ABSTRACT:
In this paper, the performance limitations of two classic wireless ranging techniques based on received signal
strength (RSS) and two-way time-of-flight (ToF) measurements, respectively, are analyzed and compared in
detail. On the basis of this study, a data fusion algorithm is proposed to combine both techniques in order to
improve ranging accuracy. The algorithm has been implemented and tested on the field using a dedicated
embedded prototype made with commercial off-the-shelf components.
However, the platform can be successfully used for reliable indoor zoning, e.g., for omnidirectional and
adjustable hazard proximity detection. Most importantly, the proposed solution is absolutely general, and it is
quite simple and light from the computational point of view. Accuracy could be further improved by using a
more isotropic antenna and by integrating the ToF measurement technique at the lowest possible level on the
same radio chip used for communication.
Usually, this feature is not available in typical low-cost short-range wireless modules, e.g., for wireless sensor
networks. Thus, the results of this research suggest that combining RSS with ToF measurements could be a
viable solution for chip manufacturers interested in adding ranging capabilities to their radio modules. The
results obtained with the developed prototype are not accurate enough for fine-grained position tracking in
Ambient Assisted Living applications.
ECWAY TECHNOLOGIES
IEEE PROJECTS & SOFTWARE DEVELOPMENTS
OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE
CELL: +91 98949 17187, +91 875487 2111 / 3111 / 4111 / 5111 / 6111
VISIT: www.ecwayprojects.com MAIL TO: ecwaytechnologies@gmail.com

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A data fusion technique for wireless ranging performance improvement

1. A DATA FUSION TECHNIQUE FOR WIRELESS RANGING PERFORMANCE IMPROVEMENT ABSTRACT: In this paper, the performance limitations of two classic wireless ranging techniques based on received signal strength (RSS) and two-way time-of-flight (ToF) measurements, respectively, are analyzed and compared in detail. On the basis of this study, a data fusion algorithm is proposed to combine both techniques in order to improve ranging accuracy. The algorithm has been implemented and tested on the field using a dedicated embedded prototype made with commercial off-the-shelf components. However, the platform can be successfully used for reliable indoor zoning, e.g., for omnidirectional and adjustable hazard proximity detection. Most importantly, the proposed solution is absolutely general, and it is quite simple and light from the computational point of view. Accuracy could be further improved by using a more isotropic antenna and by integrating the ToF measurement technique at the lowest possible level on the same radio chip used for communication. Usually, this feature is not available in typical low-cost short-range wireless modules, e.g., for wireless sensor networks. Thus, the results of this research suggest that combining RSS with ToF measurements could be a viable solution for chip manufacturers interested in adding ranging capabilities to their radio modules. The results obtained with the developed prototype are not accurate enough for fine-grained position tracking in Ambient Assisted Living applications. ECWAY TECHNOLOGIES IEEE PROJECTS & SOFTWARE DEVELOPMENTS OUR OFFICES @ CHENNAI / TRICHY / KARUR / ERODE / MADURAI / SALEM / COIMBATORE CELL: +91 98949 17187, +91 875487 2111 / 3111 / 4111 / 5111 / 6111 VISIT: www.ecwayprojects.com MAIL TO: ecwaytechnologies@gmail.com

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