Efficient Treatment of 3d Time-Domain Electromagnetic Scattering Scenes by Disjointing Sub-Domains and With Consistent Approximations

Mouysset, Vincent; Mazet, Pierre-Alain; Borderies, P.

doi:10.2528/pier07013005

Cited by 9 publications

(13 citation statements)

References 20 publications

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“…These are particularly important in the implementation for TD-UTD solutions, which are primarily dependent on parameters determined by the ray propagation paths, because they are most used in the computations of UTD formulations. (11) is primarily determined by B n (t) and their derivatives as shown in (8). This section presents the values of [W mn ] N ×N for two well-known types of time basis functions commonly used in the numerical EM analysis, which allows one to further visualize its characteristics.…”

Section: Fd Solution Establishment Via Dual Relationships With Fouriementioning

confidence: 99%

“…Due to the needs of TD solutions, many efforts have been applied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Typical TD approaches include using fast Fourier transform (FFT) or analytical time transform (ATT) [16,17] to directly inverse FD solutions into TD, finite difference time domain (FDTD) [18], TD integral approaches [19] and TD uniform geometrical theory of diffractions (TD-UTD) [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Discrete Time Electromagnetic Formulization and Its Applications

Tuan¹,

Chou²

2008

PIER

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Abstract-This paper presents a formulization of time domain (TD) discrete electromagnetic (EM) solution to provide an effective analysis over a variety of EM problems. This procedure first represents the time responses of EM fields in terms of a set of selected basis functions. Their coefficients are then employed to create matrix-form Maxwell's equations with forms analogous to frequency domain (FD) Maxwell's equations, which allows one to formulate TD solutions via utilizing their corresponding FD solutions that are existing and generally much mature. This work provides general characteristics with parts previously described in the discrete-time EM theory [20,21] and, most importantly, provides rigorous theoretical derivations in formulating the TD solutions.

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Section: Fd Solution Establishment Via Dual Relationships With Fouriementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Discrete Time Electromagnetic Formulization and Its Applications

Tuan¹,

Chou²

2008

PIER

View full text Add to dashboard Cite

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“…Another one could rest onto hybridization between several different schemes like FDTD, Finite Volume (FVTD) and Time Integrated Methods (TIM) [1]. Nevertheless, none of them are suitable in regard of the overall cost (in terms of memory and CPU time) to perform the computation of a large scene [2][3][4][5]. The main restrictive point to these approaches lies into the necessity to mesh the free space between the obstacles/sources.…”

Section: Introductionmentioning

confidence: 99%

A New Ray-Tracing Based Wave Propagation Model Including Rough Surfaces Scattering

Cocheril¹,

Vauzelle²

2007

PIER

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Abstract-This paper presents a complete ray-tracing based model which takes into account scattering from rough surfaces in indoor environments. The proposed model relies on a combination between computer graphics and radar techniques. The paths between the transmitter and the receiver are found thanks to a Bi-Directional Path-Tracing algorithm, and the scattering field after each interaction between the electromagnetic wave and the environment is computed according to the Kirchhoff Approximation. This propagation model is implemented as a plug-in in an existing full 3-D ray-tracing software. Thus, we compare the results of classical ray-tracing with those of our model to study the influence of the scattering phenomenon on the wave propagation in typical indoor environments.

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“…Nevertheless, the widespread adoption of RT methods is still limited due to the high complexity and high computation time of the corresponding computer programs [21][22][23]. And, for the conventional RT algorithms such as ray tube method [17], the prediction accuracy is not satisfactory.…”

Section: Introductionmentioning

confidence: 99%

A Quasi Three-Dimensional Ray Tracing Method Based on the Virtual Source Tree in Urban Microcellular Environments

Liu¹,

Guo²

2011

PIER

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Abstract-The increase in mobile communications traffic has led to heightened interest in the use of ray tracing (RT) methods together with digital building databases for obtaining more accurate and efficient propagation prediction in urban microcellular environments. In this paper, a novel quasi three-dimensional (3-D) RT algorithm is presented by taking into account the advantages of both the image theory (IT) and the shooting-and-bouncing ray (SBR) method. It is based on creating a new virtual source tree in which the relationship between neighbor nodes is a left-son-and-right-brother one. Our theoretical results of the signal path loss along the streets are compared with measurements which have been reported for city streets in Tokyo and Ottawa City for various values of the propagation parameters. The good agreement with these measurements indicates that our prediction model works well for such microcellular communication applications. The proposed method can provide the reliable theory basis for radio-wave propagation prediction and network planning in urban microcellular environments.

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Efficient Treatment of 3d Time-Domain Electromagnetic Scattering Scenes by Disjointing Sub-Domains and With Consistent Approximations

Cited by 9 publications

References 20 publications

A Discrete Time Electromagnetic Formulization and Its Applications

A Discrete Time Electromagnetic Formulization and Its Applications

A New Ray-Tracing Based Wave Propagation Model Including Rough Surfaces Scattering

A Quasi Three-Dimensional Ray Tracing Method Based on the Virtual Source Tree in Urban Microcellular Environments

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