Time of Arrival Estimation for UWB Localizers in Realistic Environments
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Citation
Falsi, Chiara et al. “Time of Arrival Estimation for UWB Localizers in Realistic Environments.” EURASIP Journal on Advances in Signal Processing 2006 (2006): 1-14.
As Published
http://dx.doi.org/10.1155/ASP/2006/32082
Publisher
Hindawi Pub. Corp/Springer
Version
Author's final manuscript
Accessed
Fri Jun 19 05:58:50 EDT 2015
Citable Link
http://hdl.handle.net/1721.1/67307
Terms of Use Detailed Terms
Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006, Article ID 32082, Pages 1–13 DOI 10.1155/ASP/2006/32082
Time of Arrival Estimation for UWB Localizers in Realistic Environments Chiara Falsi,1 Davide Dardari,2 Lorenzo Mucchi,3 and Moe Z. Win4 1 Dipartimento
di Elettronica e Telecomunicazioni, Universit`a degli studi di Firenze, Via Santa Marta 3, 50139 Firenze, Italy WiLAB, IEIIT/CNR, CNIT, Universit`a di Bologna, Via Venezia 52, 47023 Cesena, Italy 3 Dipartimento di Elettronica e Telecomunicazioni, CNIT, Universit` a degli studi di Firenze, Via Santa Marta 3, 50139 Firenze, Italy 4 Laboratory for Information and Decision Systems (LIDS), Massachusetts Institute of Technology, Room 32-D658, 77 Massachusetts Avenue, Cambridge, MA 02139, USA 2 The
Received 14 June 2005; Revised 12 December 2005; Accepted 30 April 2006 This paper investigates time of arrival (ToA) estimation methods for ultra-wide bandwidth (UWB) propagation signals. Different algorithms are implemented in order to detect the direct path in a dense multipath environment. Different suboptimal, lowcomplex techniques based on peak detection are used to deal with partial overlap of signal paths. A comparison in terms of ranging accuracy, complexity, and parameters sensitivity to propagation conditions is carried out also considering a conventional technique based on threshold detection. In particular, the algorithms are tested on experimental data collected from a measurement campaign performed in a typical office building. Copyright © 2006 Hindawi Publishing Corporation. All rights reserved.
1.
INTRODUCTION
There has been great interest in ultra-wide bandwidth technology in recent years because of its potential for a large number of applications. A large body of literature exists on the characterization of indoor propagation channels and many indoor propagation measurements have been made [1–7]. Due to its fine delay resolution properties, UWB shows good capability for short-range communications in dense multipath environments. One of the most attractive capabilities of UWB technology is accurate position localization [8–10]. The transmission of extremely short pulses or equivalently the use of extremely large transmission bandwidths provides the ability to resolve multipath components. This implies high ranging accuracy. Position estimation is mainly affected by noise, multipath components, and different propagation speeds through obstacles in non-line-of-sight (NLOS) environments
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