Ultra-wide band sensor networks for tracking point scatterers or relays

  • Authors:
  • Luca Reggiani;Mats Rydström;Gianluigi Tiberi;Erik G. Ström;Agostino Monorchio

  • Affiliations:
  • Dipartimento di Elettronica ed Informazione, Politecnico di Milano, Milano, Italy;Department of Signals and Systems, Chalmers University of Technology, Göteborg, Sweden;Department of Information Engineering, Università di Pisa, Pisa, Italy;Department of Signals and Systems, Chalmers University of Technology, Göteborg, Sweden;Department of Information Engineering, Università di Pisa, Pisa, Italy

  • Venue:
  • ISWCS'09 Proceedings of the 6th international conference on Symposium on Wireless Communication Systems
  • Year:
  • 2009

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Abstract

In this paper we investigate the possible benefits and drawbacks of using a previously proposed "soft" ranging algorithm for tracking moving objects in indoor scenarios. The objects considered in this work could be either passive point scatterers or active relays. A number of ultra-wide band transceivers are deployed throughout the environment, and they are used to estimate multi-path propagation delays, that constitute the input data to the tracking algorithm. The motivation behind this work is that "soft" ranging algorithm enables both estimation of ranging error on a measurement-by-measurement basis, and also a straight-forward approach to multiple-hypotheses testing (MHT). Thus, this type of ranging algorithm is likely to fit well into a filter-bank tracking system. Computer simulations based on Ray-tracing propagation data indicates that the proposed approach enables both more robust and also more accurate positioning than when a more conventional threshold-based technique is used for ranging.