Testbed for IR-UWB based ranging and positioning: experimental performance and comparison to CRLBs

  • Authors:

  • Achraf Mallat;Pierre Gérard;Maxime Drouguet;Farshad Keshmiri;Claude Oestges;Christophe Craeye;Denis Flandre;Luc Vandendorpe

  • Affiliations:

  • Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...;Communications and Remote Sensing Laboratory, Devices Integrated and electronic circuits Laboratory, and Electromagnetics Microwave Communication Laboratory, Ecole polytechnique de Louvain, Louvai ...

  • Venue:
  • ISWPC'10 Proceedings of the 5th IEEE international conference on Wireless pervasive computing
  • Year:
  • 2010

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Abstract

In this paper we describe a testbed for impulse radio ultra wideband based ranging and positioning. We show the characteristics of the generated, transmitted and received pulses. We consider both the maximum likelihood estimator and a threshold-based estimator for the estimation of the time of arrival. We measure the variances for ranging and positioning and compare them to the Cramer-Rao lower bounds for range and position estimation. We discuss the impact of both false multipath component detection and false sidelobe detection on the estimation accuracy. The obtained variances are close to the Cramer-Rao lower bounds when the mainlobe of the first multipath component is detected. In realistic multipath environments we can use a threshold-based time of arrival estimator in order to detect the first multipath component which may be missed by the maximum likelihood estimator. We show also that the errors on positioning due to false multipath component and sidelobe detection can be highly mitigated by increasing the number of receivers. For a radiated energy of 8.1 pJ and a distance of 5 meters between the transmit and receive antennas, the obtained accuracy is in the order of one centimeter.