Lattice Boltzmann method for wave propagation in urban microcells

Chopard, Bastien; Luthi, Pascal O.; Wagen, J.-F.

doi:10.1049/ip-map:19971197

Cited by 45 publications

(46 citation statements)

References 4 publications

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“…The inward flows bring energy into the grid while the outward flows radiate energy out. In the conventional ParFlow model [16][17][18] which is a time-domain solver, the inward flows and outward flows are updated alternately according to a local scattering equation determined by the property of material of the grid. After a sufficient number of iterations in time domain, these flows will finally reach a steady state and then the steady-state radio coverage can be computed.…”

Section: The Mr-fdpf Modelmentioning

confidence: 99%

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Luo

Villemaud

Gorce

2015

J Wireless Com Network

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In modern mobile telecommunications, shadow fading has to be modeled by a two-dimensional (2D) correlated random variable since shadow fading may present both cross-correlation and spatial correlation due to the presence of similar obstacles during the propagation. In this paper, 2D correlated random shadowing is generated based on the multi-resolution frequency domain ParFlow (MR-FDPF) model. The MR-FDPF model is a 2D deterministic radio propagation model, so a 2D deterministic shadowing can be firstly extracted from it. Then, a 2D correlated random shadowing can be generated by considering the extracted 2D deterministic shadowing to be a realization of it. Moreover, based on the generated 2D correlated random shadowing, a complete 2D semi-deterministic path loss model can be proposed. The proposed methodology of this paper can be implemented into system-level simulators where it will be very useful due to its ability to generate realistic shadow fading.

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Section: The Mr-fdpf Modelmentioning

confidence: 99%

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Luo

Villemaud

Gorce

2015

J Wireless Com Network

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“…The starting point of this algorithm is a ParFlow approach proposed by Chopard and al. [8]. The advantages of the method are its speed and its accuracy.…”

Section: Radio Planning Solvermentioning

confidence: 99%

Reliability of active RFID tag immersed in water for “preventing infant abduction” application

Crémoux¹,

Boyer

Dhia³

2014

2014 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC)

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In this paper, a method is developed to evaluate the reliability of active RFID tags immersed in water. This situation exists in particular when infants wearing anti-rapt tag take bath. This study discusses the effects on the electromagnetic radiation of an emitting tag plunged into a water volume and then proposes a statistical method to predict the radio coverage of the immersed tag. Finally it demonstrates that the RFID technology is barely affected by this issue even though other RFID technologies do not support immersion. Keywords-RFID localization; radio propagation; indoor environment. INTRODUCTIONTo prevent infant abduction, technology based on RFID is a growing application. To control where and when infant is in the maternity ward, RFID tags are attached to infant's ankle and are identified and located by stations installed in the building. Several technologies or strategies have been proposed to detect and locate the RFID tags. The first strategy consists in measuring the RSSI of the ID signal sent by the tag regularly (e.g. every quarter of minute) and deducing infant's positions by RSSI triangulation [1]. Another strategy uses the Time Of Flight (TOF) triangulation usually based on UWB signal [2]. A third strategy is called polling LF-RF: the tag sends its ID through a radiofrequency (RF) link only if it is in the vicinity of a station placed closed to an access door which covers a limited range by a low frequency (LF) signal. Technologies with passive tags and security gate are affected by weaker ranges than technologies based on active tag.

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“…CA is a kind of discrete computations which has been developed for modeling wide range of phenomena including many physical processes described generally by partial differential equations [7]. Specifically the wave propagation models have been studied by researchers based on Cellular Automata [3]- [8]. The works include Chopard et al [8] who had modeled wave propagation by Lattice Boltzmann approach applicable for practical situations such as the radio wave transmission in complex urban environments.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically the wave propagation models have been studied by researchers based on Cellular Automata [3]- [8]. The works include Chopard et al [8] who had modeled wave propagation by Lattice Boltzmann approach applicable for practical situations such as the radio wave transmission in complex urban environments. The authors have also developed an acoustic wave propagation model for two dimensional acoustic problems for simulating sound source movement, sound diffraction by the presence of barriers and reflection due to inhomogeneity of acoustic media [9].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Sound Absorption by Porous Materials Using Cellular Automata

Komatsuzaki

Iwata

2006

Lecture Notes in Computer Science

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Abstract. In the present study, acoustic wave propagation in acoustic tube in-corporating sound absorbing material is simulated using Cellular Automata (CA). CA is a discrete system which consists of finite state variables, arranged on a uniform grid (cell). CA dynamics is described by a local interaction rule, which is used for computation of new state of each cell from the present state at every time step. In this study an acoustic tube model is introduced in which ab-sorbing material is characterized by direct modeling of porosity and flow resis-tance. Direct numerical simulation CA model is performed and evaluated by absorption coefficient using standing wave ratio measure. The results showed good correspondence with analytical solutions.

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Lattice Boltzmann method for wave propagation in urban microcells

Cited by 45 publications

References 4 publications

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Reliability of active RFID tag immersed in water for “preventing infant abduction” application

Modeling of Sound Absorption by Porous Materials Using Cellular Automata

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Lattice Boltzmann method for wave propagation in urban microcells

Cited by 45 publications

References 4 publications

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Generation of 2D correlated random shadowing based on the deterministic MR-FDPF model

Reliability of active RFID tag immersed in water for &#x201C;preventing infant abduction&#x201D; application

Modeling of Sound Absorption by Porous Materials Using Cellular Automata

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Reliability of active RFID tag immersed in water for “preventing infant abduction” application