Scattering effect based on measurements of reflection coefficients at 60 GHz in an underground mine gallery

Tariq, Shah Ahsanuzzaman Md; Despins, Charles; Affes, Sofiène; Nerguizian, Chahé

doi:10.1109/pimrc.2014.7136163

Cited by 4 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The horizontal and vertical polarization orientations of an antenna can be used to measure the Fresnel reflection coefficient parameters denoted as |Γ ⊥ | and |Γ ∥ |, respectively [39,53]. The results show that the values of the reflection coefficients of limestone, glass, and brick materials are different at 1.9 and 4 GHz [54].…”

Section: Polarization Effectmentioning

confidence: 99%

“…The results show that the incident power is scattered within a range of about 10° along the specular direction of the reflected wave. Moreover, the PL difference between the reflected and the line of sight (LOS) signals is found to be around 19 dB reported in [39] where the surface material absorption and incident power dissipation may occur along with the propagation loss [40, 41]. Thus, the channel scattering and the constructive addition of the scattered paths along with the specular reflected path may increase the Rx power thereby leading to a lower value of n compared to the lower frequency bands such as 2.4 GHz.…”

Section: Measurement Setup and Experimental Protocolmentioning

confidence: 99%

“…Some parts of this article are archived in the first author's Ph.D. thesis reported in [35]. Some results and analysis of this article are summarized from the author's studies reported in [36][37][38][39]. In this article, the measurements and characterization are examined by considering the facts of polarization, scattering, waveguide, and antenna radiation patterns dealing with the different magnitudes of the floor, wall, and ceiling roughness in different gallery dimensions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications

Tariq

Despins

Affes

et al. 2021

IET Microwaves Antenna & Prop

Self Cite

View full text Add to dashboard Cite

Large scale (i.e. <10 m) and small scale (i.e. 1 � 1� 1 cm) measurements and characterization of a scattered wireless channel with different antenna polarizations and configurations in the underground mine galleries at 60 GHz are addressed. Results show that the rough surface scattering and the gallery dimensions affect the path loss (PL) exponent and it becomes smaller than the free space. Vertically polarized antennas give a lower value of the PL exponent and root mean square (RMS) delay spread compared to the horizontal one. The small scale 3D measurement results show that the power loss of around 1-5 dB within a small scale cubical area. Results also show that the channel is less time dispersive in a wider gallery and observed a higher value of the RMS delay spread compared to a smaller gallery. The statistical results of the small scale multipath amplitude fading provide a better fit with the Rician distribution. The effects such as scattering, polarization, antenna radiation patterns, and waveguide which caused increase and decrease of the value of PL exponent and delay spread are also analysed. Results revealed that a directional narrow beam dualpolarized antenna configuration might be a good candidate in this environment. | INTRODUCTIONNowadays, short-range wireless communications offer huge possibilities to provide seamless multimedia services. Recently, the 60 GHz band has generated significant interest because of its high data rate (i.e. >1 Gbps) capability within a short-range communication in indoor environments [1]. However, the utility of wireless communications is also essential for safety and productivity particularly in an underground mine environment [2,3]. Besides the multimedia services (voice, video, and data), wireless communications are used for geolocalization of miners and equipment, speedy rescue operation of trapped miners under debris etc. In the mining industry, the well-known Through The Earth communication systems are used for vehicle tracking, monitoring, and controlling. Other systems such as radio-frequency identification, Zigbee, wireless sensor networks, and Wi-Fi systems are also convenient to use in underground mine. The use of the Internet of Things and This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Section: Polarization Effectmentioning

confidence: 99%

Section: Measurement Setup and Experimental Protocolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications

Tariq

Despins

Affes

et al. 2021

IET Microwaves Antenna & Prop

Self Cite

View full text Add to dashboard Cite

show abstract

Angular Dispersion of a Scattered Underground Wireless Channel at 60 GHz

et al. 2020

Self Cite

View full text Add to dashboard Cite

The 60 GHz frequency band is identified as a suitable band for Gbps speed wireless communication in an Underground mine due to its high antenna directivity and high signal attenuation. However, the rough mine surface and the 5 mm wavelength may produce rich scattering phenomenon of multipath signals. To characterize the channel and more insight into the scattering, the angular dispersion measurements are conducted in different mine gallery depths and dimensions. The scattering is analyzed by the angle of arrivals of the incoming paths at the receiver, which is characterized by the statistical parameters of the multipath shape factors. The results of the multipath shape factor are explained and show that at around 3 m link distance, the incoming paths are mostly in two or three directions within a resolution angle of around between ±30 • and ±40 • . The statistical distribution of the multipath angle of arrivals follows a Gaussian probability distribution. The results also show that the angular spreads of multipath are proportional to the gallery dimensions and inversely proportional to the link distances.INDEX TERMS 60 GHz wideband channel measurements, underground mine, angle of arrivals, scattering.

show abstract

60 GHz temporal dispersion characteristics with different antenna polarizations in an underground mine

Tariq

Despinsi

Affesi

et al. 2017

2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)

View full text Add to dashboard Cite

Scattering effect based on measurements of reflection coefficients at 60 GHz in an underground mine gallery

Cited by 4 publications

References 9 publications

Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications

Characterization of a 60 GHz scattered wireless channel with different antenna polarizations for underground multimedia applications

Angular Dispersion of a Scattered Underground Wireless Channel at 60 GHz

60 GHz temporal dispersion characteristics with different antenna polarizations in an underground mine

Contact Info

Product

Resources

About