Investigation of UWB Ranging in Dense Indoor Multipath Environments

Irahhauten, Z.; Bellusci, Giovanni; Janssen, G. C. A. M.; Nikookar, H.; Tiberius, C.C.J.M.

doi:10.1109/iccs.2006.301405

Cited by 18 publications

(13 citation statements)

References 10 publications

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“…This section describes a simple time of arrival estimation method [8] used for comparison to the effective bandwidth method suggested above. The first two steps are identical to those described in Section III-A.…”

Section: B Toa Estimation Via Arrival Energymentioning

confidence: 99%

“…This method is used by [7], that tracks a moving transmitter. [8] compares the ranging errors using delay estimation to those achieved by a technique based on received signal strength. It concludes that additional delay introduced by propagation through walls is a significant source of range error in NLoS indoor environments, and shows localization errors in the range of meters for terminals up to 10 meters apart.…”

Section: Introductionmentioning

confidence: 99%

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UWB localization via multipath distortion

Uziel

Porrat

2010

2010 IEEE Sensor Array and Multichannel Signal Processing Workshop

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A new method for non line of sight transmitter localization is suggested, based on the effective bandwidth of different multipath components in the UWB channel response. The method essentially relies on the difference in the distortion applied by the channel to early and to late arrivals in the channel impulse response, the early arrivals have a wider effective bandwidth. Localization results on measured channel responses show the superiority of the new method over a method based on a multipath energy detector.

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Section: B Toa Estimation Via Arrival Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UWB localization via multipath distortion

Uziel

Porrat

2010

2010 IEEE Sensor Array and Multichannel Signal Processing Workshop

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“…Unfortunately, the LOS case doesn't describe all the practical situations such as the indoor dense multipath environment [7]. In [7], the ranging in dense multipath is investigated. In [8], the authors have proposed an algorithm of localization in order to reduce the effect of NLOS propagation.…”

Section: Introductionmentioning

confidence: 99%

An evaluation of UWB localization under non line-of-sight (NLOS) propagation

Maali

Ouldali

Baudoin

2008

2008 3rd International Symposium on Wireless Pervasive Computing

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In this paper we evaluate the statistical performances of the association of a low-complexity of the time of arrival (TOA) estimation algorithm and the location estimation algorithm in a non line-of-sight (NLOS) indoor environment. For that, we choose the time hopping (TH) code and pulse amplitude modulation (PAM) for ultra wideband (UWB) symbols and the IEEE802.15.3a models (CM1 and CM3) for the channel propagation. The numerical simulations show that the accuracy of TOA estimation can be achieved with only one training symbol period for data aided (DA) mode in LOS propagation (CM1). These performances are seriously degraded in NLOS propagation (CM3). Otherwise, the obtained results show the harmful effect of increasing the number of NLOS nodes (basic stations) on the positioning accuracy.

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“…the GPS are usually not available, unreliable or inaccurate [1]. In fact, it is well known that algorithms based on the measurement of Time of Arrival (TOA) or Time Difference of Arrival (TDOA) are able to reach centimetre level accuracy, at least in Line of Sight (LOS) propagation [2], [3]. On the other hand, this approach appears particularly demanding, and in a real positioning system the effective accuracy is limited by the hardware requirements of this solution.…”

Section: Introductionmentioning

confidence: 99%

Novel Ultra Wideband Low Complexity Ranging Using Different Channel Statistics

Bellusci

Janssen

Yan

et al. 2008

2008 IEEE Wireless Communications and Networking Conference

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UWB technology can reach centimetre level ranging and positioning accuracy in LOS propagation when time of arrival techniques are used. However, in a real positioning system, this accuracy poses high demands on hardware. In this paper, we investigate the possibility of using UWB channel impulse response statistics, other than the TOA, for ranging applications, thus avoiding the costly synchronization between the system nodes. First, models for the total received signal power, for the first path power, and for the mean excess delay of the power delay profile are proposed, based on an extensive UWB measurement campaign conducted in typical office environments. The distance dependency of these statistics is analyzed. These models are subsequently used to obtain a best linear unbiased estimation of the distance. Finally, it is shown how the knowledge of the model of the described statistics, can be used to identify the environment in which the transmitter and receiver are operating. The achieved standard deviation of the range error is 0.35 m, about three times less than obtained with the classical signal strength estimation.

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Investigation of UWB Ranging in Dense Indoor Multipath Environments

Cited by 18 publications

References 10 publications

UWB localization via multipath distortion

UWB localization via multipath distortion

An evaluation of UWB localization under non line-of-sight (NLOS) propagation

Novel Ultra Wideband Low Complexity Ranging Using Different Channel Statistics

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