Wideband measurements of channel characteristics at 2.4 and 5.8 GHz in underground mining environments

Benzakour, A.; Affes, Sofiène; Despins, Charles; Tardif, Pierre-Martin

doi:10.1109/vetecf.2004.1404734

Cited by 24 publications

(10 citation statements)

References 7 publications

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“…The measurements were performed in the frequency domain and the inverse Fast Fourier transform (IFFT) was applied to the measured complex transfer function in order to obtain the channel impulse response [3,4]. Figure 2 presents frequency response obtained at a distance of 3 meters from the point of reference.…”

Section: Results and Comparisonmentioning

confidence: 99%

Impact of motor noise on channel propagation parameters in an underground mine

Nkakanou¹,

Delisle²,

Hakem³

et al. 2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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This paper presents impact of mechanical motor noise on channel propagation parameters in an underground mine. The reported results are based on experimental data obtained during a measurement campaign in the mine around 5.8 GHz. The measurements were performed in an experimental gold mine located in Val d'Or, Qc, Canada at 40m below ground level using two different scenarios. In the first case, the motor was turned off while, in the second case, the engine was running. Based on the measured data, the impact of mechanical motor noise on some channel propagation parameters in the underground mine are analyzed and discussed.

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Section: Results and Comparisonmentioning

confidence: 99%

Impact of motor noise on channel propagation parameters in an underground mine

Nkakanou¹,

Delisle²,

Hakem³

et al. 2013

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)

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Section: A Environment Descriptionmentioning

confidence: 99%

“…The floor, albeit flatter than the ceiling and walls, has some water puddles [1] [2]. The gallery stretches over a length of 70 meters with 2.5 to 3 meters in width and about 3 meters in height [2]. There are three areas of interest: one LOS area (from 1 to 22 meters) and two NLOS areas (NLOS1 from 23 to 46 meters, and NLOS2 from 47 to 70 meters).…”

Section: A Environment Descriptionmentioning

confidence: 99%

Characterization and Modeling of a Wireless Channel at 2.4 and 5.8 GHz in Underground Tunnels

Boutin

Benzakour

Despins

et al. 2006

2006 3rd International Symposium on Wireless Communication Systems

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Underground tunnels, such as caverns and mine galleries, are indoor environments far more hostile, in terms of wireless communication, than conventional ones like road tunnels, offices or factories. Wireless propagation behavior in these areas is found to be fairly peculiar, mainly due to the extreme roughness of wall surfaces. This paper presents comprehensive broadband measurement and modeling results of electromagnetic wave propagation in real underground mine tunnels at 2.4 and 5.8 GHz. Broadband radio propagation in these environments is observed to exhibit behavior that is quite different from conventional indoor environments with smooth surfaces. Notably, signal variation can be highly locally specific and site-specific, rms delay spread varies randomly with transmitter-receiver distance and no path arrival clustering effect is observed. These path time arrivals tend to follow a Modified Poisson distribution and amplitude tends to follow Rice and Rayleigh distributions for line-of-sight and non-line-of-sight cases, respectively. Extensive simulations have shown the models to be very close to reality.

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“…With regards to polarization, different studies have reported measurements results on the horizontal, vertical and cross-polarized setups [6][7][8][9][10]. However, for circularly polarized antennas' systems, very few studies are reported on the channel characterization in a tunnel environment and no study has yet been performed in a mine environment.…”

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confidence: 99%

Channel Characterization of Circularly Polarized Antenna Mimo System in an Underground Mine

Azhari¹,

Talbi²,

Arabi³

et al. 2018

PIER M

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Abstract-In this paper, a channel characterization of an RF link using circularly polarized antennas inside a mine is performed. The association of circular polarization with multiple-input-multiple-output (MIMO) radio technologies represents a powerful tool to improve the performance of an underground RF channel. The statistical parameters of the channel are derived from in-mine measurements at the 2.4 GHz band for both co-polarization (CP) and cross-polarization (XP) scenarios. Results show a remarkable improvement through the use of MIMO combined with circular polarization compared to the regular patch MIMO antenna system, in terms of channel capacity and path loss. This improvement increases significantly at the XP scenarios, reaching up to 18 bps/Hz for channel capacity and up to 21 dB for path loss. The RMS delay spread for a circularly polarized setup is generally higher than the linearly polarized MIMO patch setup due to surface roughness of the gallery. In the linear polarization case, a signal degradation of more than 15 dB at the XP case is observed compared to the CP scenario. This signal loss that is due to depolarization is somewhat mitigated by the surface roughness. Due to its superior and stable performance, MIMO combined with circular polarization is better suited than a regular MIMO patch system for in-mine uses especially in the applications where the transmitter may change direction with respect to the receiver.

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Wideband measurements of channel characteristics at 2.4 and 5.8 GHz in underground mining environments

Cited by 24 publications

References 7 publications

Impact of motor noise on channel propagation parameters in an underground mine

Impact of motor noise on channel propagation parameters in an underground mine

Characterization and Modeling of a Wireless Channel at 2.4 and 5.8 GHz in Underground Tunnels

Channel Characterization of Circularly Polarized Antenna Mimo System in an Underground Mine

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