Geolocation for UWB Networks in underground mines

Chehri, Abdellah; Fortier, Paul; Tardif, Pierre-Martin

doi:10.1109/wamicon.2006.351898

Cited by 18 publications

(11 citation statements)

References 7 publications

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“…UWB localization can be applied to traffic managing systems, where congestion is avoided by locating the transmitter with UWB signal from the equipped vehicle size antenna [65]. The portable UWB positioning device is developed for special scenarios, such as snowy environment and underground mines [66,67]. In practical localization systems including network application, a proper design of the UWB hardware is important for reducing power consumption as much as possible under the condition that the localization precision is insured [68,69].…”

Section: Embodiment Of Uwb Localization Systemmentioning

confidence: 99%

A survey on impulse-radio UWB localization

Xiao

Hei

et al. 2010

Sci. China Inf. Sci.

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Impulse radio ultra-wideband (IR-UWB) technique has good performance in the application of high-precision localization since it possesses unique properties such as large instantaneous bandwidth and high time resolution. Making IR-UWB localization technology a growing hot topic in recent research field, therefore, it is necessary for us to give an overview of it in this paper. The TOA estimation, error analysis, NLOS identification and NLOS localization are studied in details based on the ranging methods. Simultaneously the UWB localization applications and practical problems are pointed out. At last, we outline the challenges for further research of IR-UWB localization.

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Section: Embodiment Of Uwb Localization Systemmentioning

confidence: 99%

A survey on impulse-radio UWB localization

Xiao

Hei

et al. 2010

Sci. China Inf. Sci.

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“…Multimedia contents as video data or high resolution ranging, are critical in hostile environment, such as underground communication for mines; hence, security issues and economic context leads to high demand of low-cost and reliable UWB systems for underground communication [1]. US-FCC defines UWB to cover frequency bandwidth from 3.1 GHz to 10.6 GHz [2].…”

Section: Introductionmentioning

confidence: 99%

Ultra Wideband CPW-Fed Aperture Antenna With Wlan Band Rejection

Habib

Bostani²,

Djaiz³

et al. 2010

PIER

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Abstract-In this paper, we present a new ultra wideband antenna design with band rejection for UWB applications. A CPW-fed circular patch radiates through a circular aperture, which ensures wideband impedance matching and stable omnidirectional pattern over an UWB frequency range, from 3 GHz to 10.6 GHz. In order to avoid interference with WLAN applications, at 5.8 GHz, the antenna is slightly modified to reject undesired band. A semi-circular slot ring is etched on the circular patch at the notch frequency, which creates an open circuit and avoids impedance matching and current propagation. A prototype was fabricated and measured, and the obtained experimental results agree with simulations and show an omnidirectional azimuth pattern over the entire bandwidth.

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“…In the real time application phase, the position of the unknown receiver was assumed to be the grid point whose signature most closely resembles the measurement vector obtained by the receiver at that moment. But later actual images such as the spatial power spectrum [12] and the power delay profile [13] were used as the finger print. This gave rise to image matching techniques being used for finger print matching, instead of previously used technique of minimizing the N-Dimensional Euclidean distance.…”

Section: Introductionmentioning

confidence: 99%

“…This resulted in greater positioning accuracy in hazardous Non-LOS environments with fewer numbers of transmitters. Thus what we present as the resultant pseudo-spectrum can actually be thought as the "ultimate finger print" for radio map construction as it is an improved version (with the noise removed) of the power delay profile used in [13].…”

Section: Introductionmentioning

confidence: 99%

Versatile algorithms for accurate indoor geolocation

Godaliyadda

Garg

2009

2009 16th International Conference on Digital Signal Processing

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This paper tackles the challenging problem of accurate indoor geolocation for UWB systems in hazardous multipath environments through three versatile super resolution techniques: time domain MUSIC (Multiple Signal Classification), frequency domain MUSIC algorithms and frequency domain EV (Eigen Value) method. The resultant pseudo-spectrums generated by these algorithms can be used for positioning in both LOS (through accurate time delay estimation) and Non-LOS (by using the resolved multipath profile as a fingerprint for location based fingerprinting techniques) environments. The impact of Eigen value de-weighting on multipath resolvability is demonstrated and its practical implications highlighted. The superior noise immunity of the time domain MUSIC algorithm is verified and introduced as a prime candidate for noisy Non-LOS environments. Finally the spectral leakage effect of the time domain MUSIC algorithm is used to our advantage to generate variants of the algorithm to provide better positioning accuracy for relatively low bandwidth conditions.

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Geolocation for UWB Networks in underground mines

Cited by 18 publications

References 7 publications

A survey on impulse-radio UWB localization

A survey on impulse-radio UWB localization

Ultra Wideband CPW-Fed Aperture Antenna With Wlan Band Rejection

Versatile algorithms for accurate indoor geolocation

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