Radio Wave Characterization and Modeling in Underground Mine Tunnels

Boutin, Maurice; Benzakour, A.; Despins, Charles; Affes, Sofiène

doi:10.1109/tap.2007.913144

Cited by 138 publications

(103 citation statements)

References 26 publications

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“…As explained by Sun and Akyildiz [17], the delay spread in an underground surroundings is influenced by the number of significant modes which exists and the transmitter receiver distance. The same conclusion on the propagation behavior in underground environments was obtained in [3,4]. The mean excess delay and the maximum excess delay have also been computed for a threshold level of 15 dB.…”

Section: Time Propertiessupporting

confidence: 57%

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Experimental Characterization of a Mimo Underground Mine Channel at 2.45 GHZ

Coulibaly¹,

Mnasri²,

Nedil³

et al. 2013

PIER B

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Abstract-In this paper, an experimental characterization of a MIMO underground channel is presented. A simple statistical model is proposed at 2.45 GHz. The channel is characterized in terms of path loss, shadowing, RMS delay spread, and capacity. The measurements are carried out in an underground mine, which is a harsh confined environment. The path loss model is extracted from measured data for the line of sight (LOS) and non-line of sight (NLOS) scenarios for both MIMO and SISO channels. The path loss exponent in LOS is less than 2 in MIMO and SISO as the environment has a dense concentration of scatterers. A statistical study is carried out to find the delay spread. For MIMO and SISO, there is no relation between the delay spread and the transmitter receiver distance. Furthermore, the delay spread of the MIMO is less than the one of the SISO channel in the LOS measurement campaigns. Aikake information criteria are used as a goodness of fit for different statistical distributions to represent the delay spread. According to the calculated capacity for a constant signal to noise ratio in LOS case, the transmission performance is significantly improved by using the MIMO scheme over the traditional SISO. Therefore, MIMO is an ideal candidate for future wireless underground communications.

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Section: Time Propertiessupporting

confidence: 57%

“…The path loss exponents are almost similar in both MIMO and SISO. Our results are compared to those obtained in the same mine, but in another gallery [3]. The obtained path loss exponent is around 2.03 at the .…”

Section: Path Lossmentioning

confidence: 69%

Experimental Characterization of a Mimo Underground Mine Channel at 2.45 GHZ

Coulibaly¹,

Mnasri²,

Nedil³

et al. 2013

PIER B

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“…For a rectangular tunnel, 8 m × 5.6 m, the theoretical values of the D s deduced from the ray approach are larger and vary from 6 ns in the near zone to 4 ns beyond 100 m. The difference may be due to the idealized rectangular shape of the tunnel in the theoretical model, instead of the curved shape of the tunnel where experiments took place. The values of D s can be compared to those measured in an empty tunnel, without obstacles, and described by other authors as in [3] and [6]. In a 70 m long mine gallery, it was shown [3] that D s in the 2.4 GHz band is less than or equal to 6.3 ns for 50% of all locations.…”

Section: Delay Spreadmentioning

confidence: 82%

“…The values of D s can be compared to those measured in an empty tunnel, without obstacles, and described by other authors as in [3] and [6]. In a 70 m long mine gallery, it was shown [3] that D s in the 2.4 GHz band is less than or equal to 6.3 ns for 50% of all locations. The corresponding value for the 5.8 GHz band is 5 ns.…”

Section: Delay Spreadmentioning

confidence: 82%

“…Measurements at 900 MHz in typical coal mine operational zones for vertical and horizontal polarization are reported in [1]. Results of wideband measurements and statistical modeling in the range of 150-900 MHz are given in [2] and at 2.4 GHz and 5.8 GHz in [3]. Channel modeling and an analysis of wireless networks at 500 MHz or 1 GHz are described in [4].…”

Section: Introductionmentioning

confidence: 99%

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Double Directional Channel Measurements in an Arched Tunnel and Interpretation Using Ray Tracing in a Rectangular Tunnel

Garcia-Pardo¹,

Molina‐Garcia‐Pardo²,

Liénard³

et al. 2012

PIER M

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Abstract-The objective of this paper is to study the wideband characteristics of the radio channel in a tunnel environment, not only the delay spread, but also the angle of departure/arrival of the rays, their relative weights and their delays, which are important values for Multiple-Input Multiple-Output applications. In order to achieve this goal, a measurement campaign has been carried out in a straight arched tunnel over a frequency band extending from 2.8 to 5.0 GHz and distance varying from 50 m up to 500 m. First, the variations of the channel impulse response and of the delay spread versus the distance between the transmitter and the receiver are analyzed. Then, the bidirectional channel characteristics have been extracted from the measured channel matrices using a high resolution estimation algorithm. The main contribution of this paper is to clearly show the quantitative variation of the delay spread and the angle of departure/arrival of the rays along a real tunnel and to investigate the possibility of using the ray theory in a rectangular tunnel to interpret experimental results obtained in an arched tunnel.

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Wireless Communication in Underground Mines

Bandyopadhyay

Chaulya

Мишра

2010

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except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights.Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com) PrefaceWireless communication has emerged as an independent discipline in the past decades. Everything from cellular voice telephony to wireless data transmission using wireless sensor networks has profoundly impacted the safety, production, and productivity of industries and our lifestyle as well. After a decade of exponential growth, the wireless industry is one of the largest industries in the world. Therefore, it would be an injustice if the wireless communication is not explored for mining industry.Underground mines, which are characterized by their tough working conditions and hazardous environments, require fool-proof mine-wide communication systems for smooth functioning of mine workings and ensuring better safety. Proper and reliable communication systems not only save the machine breakdown time but also help in immediate passing of messages from the vicinity of underground working area to the surface for day-to-day normal mining operations as well as for speedy rescue operations in case of disaster. Therefore, a reliable and effective communication system is an essential requisite for safe working, and maintaining requisite production and productivity of underground mines. Most of the existing systems generally available in underground mines are based on line (wired) communication principle, hence these are unable to withstand in the disaster conditions and difficult to deploy in inaccessible places. Therefore, wireless communication is an indispensable, reliable, and convenient system and essential in case of day-to-day normal duty or disaster situations. However, at present there is no relevant book available in the global market regarding wireless communication technology in underground mines and hazardous areas. Therefore, a comprehensive textbook on wireless communication for underground mines is a vital need for mining and electronics engineers that provides a deeper understanding of the important subject and designing the intrinsic safe systems. Considering these facts, this book is written, incorporating various communication devices designed and developed by the authors for wireless communication in different areas of underground mines and their experiences in the fields.The wireless communication systems used on surface cannot be applied straightaway in underground mines due to high attenuation of radio waves in underground strata, besides presence of inflammable gases and hazardous environment...

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Radio Wave Characterization and Modeling in Underground Mine Tunnels

Cited by 138 publications

References 26 publications

Experimental Characterization of a Mimo Underground Mine Channel at 2.45 GHZ

Experimental Characterization of a Mimo Underground Mine Channel at 2.45 GHZ

Double Directional Channel Measurements in an Arched Tunnel and Interpretation Using Ray Tracing in a Rectangular Tunnel

Wireless Communication in Underground Mines

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