A hybrid method of FDTD and vector parabolic equation for radio wave propagation prediction in tunnels

Hou, Weibin; Wang, Junhong; Li, Yujian

doi:10.1109/apusncursinrsm.2017.8072862

Cited by 12 publications

(8 citation statements)

References 4 publications

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“…The results of this study underline that the FI model shows a match in a hall environment with a tilted antenna, an untilted antenna, and TAS antenna systems to locate the receiver antenna in the CS and WS positions. The ABG model offers a comparable performance limited to the specific WS positions (Figures [15][16][17], except in the case where the shadowing factor is comparatively high, 8.78 (Table 8). The CI model shows a predominantly consistent performance next to the FI model.…”

Section: Discussionmentioning

confidence: 99%

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Path Loss Investigation in Hall Environment at Centimeter and Millimeter-Wave Bands

Samad

Choi

2022

Sensors

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The millimeter-wave (mmWave) frequency is considered a viable radio wave band for fifth-generation (5G) mobile networks, owing to its ability to access a vast spectrum of resources. However, mmWave suffers from undesirable characteristics such as increased attenuation during transmission. Therefore, a well-fitted path loss model to a specific environment can help manage optimal power delivery in the receiver and optimal transmitter power in the transmitter in the mmWave band. This study investigates large-scale path loss models in a university hall environment with a real-measured path loss dataset using directional horn antennas in co-polarization (H–H) and tracking antenna systems (TAS) in line-of-sight (LOS) circumstances between the transmitter and receptor at mmWave and centimeter-level bands. Although the centimeter-level band is used in certain industrialized nations, path loss characteristics in a university hall environment have not been well-examined. Consequently, this study aims to bridge this research gap. The results of this study indicate that, in general, the large-scale floating-intercept (FI) model gives a satisfactory performance in fitting the path loss both in the center and wall side links.

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Section: Discussionmentioning

confidence: 99%

“…The vector parabolic equation [15] and the finite difference time domain technique [16] have also been used to calculate the propagation of electromagnetic waves while reducing the computational complexity. In recent years, a combination of the two strategies has been proposed in many studies to minimize the computational load [17,18].…”

Section: Introductionmentioning

confidence: 99%

Path Loss Investigation in Hall Environment at Centimeter and Millimeter-Wave Bands

Samad

Choi

2022

Sensors

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“…To simplify the FDTD methodology, [49] suggested using a modified version termed the segmented-locally onedimensional FDTD approach. The FDTD approach can be used to model regions that include obstructions or antennae, and the VPE technique can be used to represent hollow tunnels that extend for a larger distance [36].…”

Section: ) Numerical Methodsmentioning

confidence: 99%

“…In [36], another type of hybrid technique that could be used to reduce computational complexity was proposed. This technique uses the vector parabolic equation (VPE) method for long distances and the FDTD method in areas with obstacles or antennas.…”

Section: A Core Modelsmentioning

confidence: 99%

Wave Propagation Modeling Techniques in Tunnel Environments: A Survey

et al. 2023

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The prediction of radio signal transmission in tunnels is important for wireless communication link design as it enables the delivery of optimum power to the intended receiver inside the tunnel. Several techniques have been proposed to estimate path loss for wireless communication inside tunnels. The radio coverage range and where base stations need to be installed can be figured out with the help of propagation models. At the time of developing these models, modeling complexity and environmental attributes, such as the tunnel geometry and the electrical and magnetic properties of its walls and interior materials are considered. A limited amount of literature currently overviews how waves transmits through tunnels and how electromagnetic wave transmission has recently changed. This survey, which examines current advancements in the propagation of waves in tunnels, aims to address this gap. In this review, thirty wave propagation models were analyzed and grouped into distinct categories for the first time. The detailed specifications of each model were omitted to make the survey easy to comprehend. This comparative research will help service providers adopt an appropriate propagation model and plan efficient transmitter and receiver placement and link management for a specific tunnel environment.INDEX TERMS Artificial neural network, radio wave propagation, ray tracing, scaling, tunnel.

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“…The main advantage of the PE method over the IE method is due to its high efficiency [18]. Later on, the FDTD-PE algorithm has been extended to various propagation problems including tunnels [27], outdoor-to-indoor scenarios [28], and near-source obstacles [29].…”

Section: Introductionmentioning

confidence: 99%

Hybrid FDTD–PE method for Loran‐C ASF prediction with near‐source complex topography

Wang

et al. 2019

IET Microwaves, Antennas & Propagation

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The parabolic equation (PE) method and finite‐difference time‐domain (FDTD) method are combined to predict long‐range Loran‐C additional secondary factors (ASFs) in situations with near‐source complex topography. The non‐uniform FDTD method is employed in the complex source region, while the PE method is used for propagation over smooth terrain to a long distance. By using the advantages of each algorithm, the hybrid FDTD–PE approach is capable of modelling the near‐source topographic details, while saving much computational resources as compared to a full FDTD solution. Numerical results along several paths are used to validate the hybrid algorithm. Furthermore, the hybrid method is applied to analyse the effect of near‐source topographic complexities, including non‐flat land, land–sea transition, and island (cliff)–sea transition, on the navigational coverage for the planning of the Loran‐C systems.

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A hybrid method of FDTD and vector parabolic equation for radio wave propagation prediction in tunnels

Cited by 12 publications

References 4 publications

Path Loss Investigation in Hall Environment at Centimeter and Millimeter-Wave Bands

Path Loss Investigation in Hall Environment at Centimeter and Millimeter-Wave Bands

Wave Propagation Modeling Techniques in Tunnel Environments: A Survey

Hybrid FDTD–PE method for Loran‐C ASF prediction with near‐source complex topography

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