A new location system for an underground mining environment using visible light communications

Iturralde, Daniel; Azurdia-Meza, César A.; Krommenacker, Nicolas; Soto, Ismael; Ghassemlooy, Zabih; Becerra, N.

doi:10.1109/csndsp.2014.6924006

Cited by 40 publications

(25 citation statements)

References 18 publications

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“…Another application of a VLC-based alarm system for mining environments is presented in [28]. Finally, several works that applied localization in mining environments based on VLC systems are presented in [29][30][31][32]. As we can see, the largest number of works related to VLC in underground mines, are security applications, location, or brief proposals of channel models that can be improved; thus, this presents an opportunity to analyze other problems present in these scenarios, such as the decrease of the ICI or the improvement of system performance.…”

Section: Vlc Channel Models Applied To Underground Mining Environmentsmentioning

confidence: 99%

Interference Mitigation for Visible Light Communications in Underground Mines Using Angle Diversity Receivers

Játiva

Cañizares

Azurdia-Meza

et al. 2020

Sensors

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This paper proposes two solutions based on angle diversity receivers (ADRs) to mitigate inter-cell interference (ICI) in underground mining visible light communication (VLC) systems, one of them is a novel approach. A realistic VLC system based on two underground mining scenarios, termed as mining roadway and mine working face, is developed and modeled. A channel model based on the direct component in line-of-sight (LoS) and reflections of non-line-of-sight (NLoS) links is considered, as well as thermal and shot noises. The design and mathematical models of a pyramid distribution and a new hemi-dodecahedral distribution are addressed in detail. The performances of these approaches, accompanied by signal combining schemes, are evaluated with the baseline of a single photo-diode in reception. Results show that the minimum lighting standards established in both scenarios are met. As expected, the root-mean-square delay spread decreases as the distance between the transmitters and receivers increases. Furthermore, the hemi-dodecahedron ADR in conjunction with the maximum ratio combining (MRC) scheme, presents the best performance in the evaluated VLC system, with a maximum user data rate of 250 Mbps in mining roadway and 120 Mbps in mine working face, received energy per bit/noise power of 32 dB and 23 dB, respectively, when the bit error rate corresponds to 10 − 4 , and finally, values of 120 dB in mining roadway and 118 dB in mine working face for signal-to-interference-plus-noise ratio are observed in a cumulative distribution function.

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Section: Vlc Channel Models Applied To Underground Mining Environmentsmentioning

confidence: 99%

Interference Mitigation for Visible Light Communications in Underground Mines Using Angle Diversity Receivers

Játiva

Cañizares

Azurdia-Meza

et al. 2020

Sensors

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“…Similarly, in [23] Jung et al estimate the locations of an object in the room, by means of three LED lamps, where each LED lamp has a unique frequency address (F-ID). In [28], a location system for an underground mining environment is proposed, the positioning is provided by an algorithm that estimates the state of the optical channel prior the application of the trilateration technique using several fixed reference points. The goodness of this approach is related to the number of reference points; in fact, using 3 LEDs and with an hypothetically infinite number of reference points the estimation error can reach the order of few cm, while increasing up to 1 m even with 13 reference points.…”

Section: A Localizationmentioning

confidence: 99%

LAST: A Framework to Localize, Access, Schedule, and Transmit in Indoor VLC Systems

Biagi

Pergoloni

Vegni

2015

J. Lightwave Technol.

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The need allowing indoor access to the Internet services requires to reduce the electromagnetic pollution. Recently, the scientific community is looking for alternatives to the use of radio frequency communication, leading to propose and study the new paradigm of Visible Light Communications. In order to present a system implementing transmission and access procedures, we propose a logical stream starting from user localization, so as to decide which LEDs can provide access, thus basically performing a space division multiple access by scheduling data on the basis of the bits to be transmitted. For this aim, a 2-bands access scheme is proposed and implemented through the use of a separated channel where signaling specifies where, in the wavelength domain, the reception must be operated by the different users. A Multiple Input Multiple Output scheme is considered for data transmission, in order to increase rate with a reliable error rate performance. Performance is evaluated for what concerns localization and access tasks, so as to show the effectiveness of the proposed scheme. Performance comparison with recent literature has been also reported.

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“…Furthermore, they show that the approximation of the deterministic joint probabilistic model is very tight. From a practical point of view, both approaches could be used in real OFDMA networks either using radio frequency (RF) or visible light communications (VLC) [16] technologies since the models we present are generic. In particular, when the channel condition is favorable, the individual approach would suffice.…”

Section: Introductionmentioning

confidence: 99%

A chance constrained approach for uplink wireless OFDMA networks

Nuñez

Adasme

Soto

et al. 2014

2014 9th International Symposium on Communication Systems, Networks &Amp; Digital Sign (CSNDSP)

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In this paper, we compare individual and joint probabilistic constraints for a resource allocation problem in an uplink (UL) wireless OFDMA network. For this purpose, we formulate the problem as a stochastic linear programming (SLP) problem. Then, we transform this model into equivalent deterministic Second-Order Cone Programming (SOCP) problems. All models are intended to maximize the bit rates throughput of the network subject to subcarrier and power user constraints. Our preliminary numerical results show that the joint chance constraint formulation is slightly conservative than the individual probabilistic one. Finally, we show that our approximation of the deterministic joint probabilistic model is very tight.Keywords-Second order cone programming; stochastic programming; probabilistic constraints; linear programming; resource allocation in orthogonal frequency division multiple access.

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A new location system for an underground mining environment using visible light communications

Cited by 40 publications

References 18 publications

Interference Mitigation for Visible Light Communications in Underground Mines Using Angle Diversity Receivers

Interference Mitigation for Visible Light Communications in Underground Mines Using Angle Diversity Receivers

LAST: A Framework to Localize, Access, Schedule, and Transmit in Indoor VLC Systems

A chance constrained approach for uplink wireless OFDMA networks

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