A Numerical Scheme for the Solution of the Vector Parabolic Equation Governing the Radio Wave Propagation in Straight and Curved Rectangular Tunnels

Bernardi, Paolo; Caratelli, Diego; Cicchetti, R.; Schena, V.; Testa, Orlandino

doi:10.1109/tap.2009.2027142

Cited by 39 publications

(21 citation statements)

References 11 publications

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“…Authors of [39] simulated the propagation loss in curved tunnels by the theoretical deduction of modal analysis. Authors of [40], [41] predicted the loss for curved tunnels by using the parabolic equation (PE) along with the alternate direction implicit (ADI) method. Author of [42], [43] simulated the attenuation in curved tunnels by employing hybrid modeling approaches.…”

Section: Introductionmentioning

confidence: 99%

Measurements and Analysis of Large-Scale Fading Characteristics in Curved Subway Tunnels at 920 MHz, 2400 MHz, and 5705 MHz

Guan

Zhang

et al. 2015

IEEE Trans. Intell. Transport. Syst.

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Abstract-Wave propagation characteristics in curved tunnels are of importance for designing reliable communications in subway systems. This paper presents the extensive propagation measurements conducted in two typical types of subway tunnelstraditional arched "Type I" tunnel and modern arched "Type II" tunnel-with 300-and 500-m radii of curvature with different configurations-horizontal and vertical polarizations at 920,2400, and 5705 MHz, respectively. Based on the measurements, statistical metrics of propagation loss and shadow fading (path-loss exponent, shadow fading distribution, autocorrelation, and crosscorrelation) in all the measurement cases are extracted. Then, the large-scale fading characteristics in the curved subway tunnels are compared with the cases of road and railway tunnels, the other main rail traffic scenarios, and some "typical" scenarios to give a comprehensive insight into the propagation in various scenarios where the intelligent transportation systems are deployed. Moreover, for each of the large-scale fading parameters, extensive analysis and discussions are made to reflect the physical laws behind the observations. The quantitative results and findings are useful to realize intelligent transportation systems in the subway system.

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Section: Introductionmentioning

confidence: 99%

Measurements and Analysis of Large-Scale Fading Characteristics in Curved Subway Tunnels at 920 MHz, 2400 MHz, and 5705 MHz

Guan

Zhang

et al. 2015

IEEE Trans. Intell. Transport. Syst.

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“…Several papers present results based on an exact resolution of Maxwell's equations using numerical techniques such as integral methods or the resolution of the Vector Parabolic Equation (Chang et al, 2009), (Reutskiy, 2008), (Popov, 2000), (Bernardi et al, 2009). One more time, these kinds of techniques are limited, mostly due to the computational complexity.…”

Section: Existing Techniques To Model Radio Wave Propagation In Tunnelmentioning

confidence: 99%

Ray Launching Modeling in Curved Tunnels with Rectangular or Non Rectangular Section

Masson¹,

Combeau²,

Cocheril³

et al. 2013

Wave Propagation Theories and Applications

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International audienceSeveral methods to model radio wave propagation in tunnels have been published in the literature and will be presented in this chapter with their advantages and drawbacks. Among them, only few works are dedicated to non rectangular cross section and curved tunnels. Hence, we focus on a new method recently developed. The structure of the chapter is as follows. Section 2 presents the context of the works and why deployments of wireless telecommunication systems are needed for transport applications. Existing techniques to model radio wave propagation in tunnel are presented in section 3 with their respective advantages and drawbacks. The fourth and fifth sections are respectively devoted to the design and the evaluation of a propagation prediction model for curved tunnel with a rectangular or a circular cross section. Finally, section 6 concludes and presents some perspectives to these works

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“…The modal theory provides good results but is limited to canonical geometries since it considers tunnels as oversized waveguides. Some authors have also proposed an exact resolution of Maxwell's equations based on numerical techniques [6]. This kind of techniques is limited, specifically by the computational burden due to the fine discretization requirement of the environment, in terms of surface or volume.…”

Section: Existing Studies On Radio Wave Propagation In Curved Tunnelsmentioning

confidence: 99%

Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements

Masson

Cocheril

Combeau

et al. 2011

J Wireless Com Network

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Nowadays, the need for wireless communication systems is increasing in transport domain. These systems have to be operational in every type of environment and particularly tunnels for metro applications. These ones can have rectangular, circular or arch-shaped cross section. Furthermore, they can be straight or curved. This article presents a new method to model the radio wave propagation in straight tunnels with an arch-shaped cross section and in curved tunnels with a rectangular cross section. The method is based on a Ray Launching technique combining the computation of intersection with curved surfaces, an original optimization of paths, a reception sphere, an IMR technique and a last criterion of paths validity. Results obtained with our method are confronted to results of literature in a straight arch-shaped tunnel. Then, comparisons with measurements at 5.8 GHz are performed in a curved rectangular tunnel. Finally, a statistical analysis of fast fading is performed on these results.

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A Numerical Scheme for the Solution of the Vector Parabolic Equation Governing the Radio Wave Propagation in Straight and Curved Rectangular Tunnels

Cited by 39 publications

References 11 publications

Measurements and Analysis of Large-Scale Fading Characteristics in Curved Subway Tunnels at 920 MHz, 2400 MHz, and 5705 MHz

Measurements and Analysis of Large-Scale Fading Characteristics in Curved Subway Tunnels at 920 MHz, 2400 MHz, and 5705 MHz

Ray Launching Modeling in Curved Tunnels with Rectangular or Non Rectangular Section

Radio wave propagation in curved rectangular tunnels at 5.8 GHz for metro applications, simulations and measurements

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