Measurement-based ray-tracing models calibration in urban environments

Cadavid, Andrés Navarro; Ibarra, Dinael Guevara; Cardona, Narcís; Lopez, Jaime

doi:10.1109/aps.2012.6348844

Cited by 11 publications

(7 citation statements)

References 5 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Powerful electromagnetic simulation tools, which are capable of accurately reproducing the values of radioelectric signals that would be obtained in the real case, have been developed. NewFasant [59] is a tool that simulates antennas on board platforms, such as satellites and aircrafts, and radio wave propagation in urban and indoor scenarios [60][61][62]. This software has been developed by the Electromagnetic Computational group of the Alcala University and is based on asymptotic techniques, such as physical optics, combined with the Physical Theory of Diffraction (PO/PTD) and Geometrical Optics (GO) with the Uniform Theory of Diffraction (UTD) [63,64].…”

Section: Ray-tracing Theorymentioning

confidence: 99%

Localization Approach Based on Ray-Tracing Simulations and Fingerprinting Techniques for Indoor–Outdoor Scenarios

et al. 2019

View full text Add to dashboard Cite

The increase of the technology related to radio localization and the exponential rise in the data traffic demanded requires a large number of base stations to be installed. This increase in the base stations density also causes a sharp rise in energy consumption of cellular networks. Consequently, energy saving and cost reduction is a significant factor for network operators in the development of future localization networks. In this paper, a localization method based on ray-tracing and fingerprinting techniques is presented. Simulation tools based on high frequencies are used to characterize the channel propagation and to obtain the ray-tracing data. Moreover, the fingerprinting technique requires a costly initial learning phase for cell fingerprint generation (radio-map). To estimate the localization of mobile stations, this paper compares power levels and delay between rays as cost function with different distance metrics. The experimental results show that greater accuracy can be obtained in the location process using the delay between rays as a cost function and the Mahalanobis distance as a metric instead of traditional methods based on power levels and the Euclidean distance. The proposed method appears well suited for localization systems applied to indoor and outdoor scenarios and avoids large and costly measurement campaigns.

show abstract

Section: Ray-tracing Theorymentioning

confidence: 99%

Localization Approach Based on Ray-Tracing Simulations and Fingerprinting Techniques for Indoor–Outdoor Scenarios

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Most of the buildings and streets materials in the selected area of the city have the same constitutive parameters. Specifically, we assumed brick (εr=7-j0.3, μr=1) for all building walls; a first type of dry concrete (εr=5.3-j0.25, μr=1) for all building roofs; and a second type of dry concrete (εr=7-j0.3, μr=1) for street pavement, these parameters are permittivity optimized values mentioned in [7].…”

Section: B Outdoor Scenariomentioning

confidence: 99%

Heuristic UTD coefficients applied for the channel characterization in an andean scenario

Tami

Rego

Moreira

et al. 2015

2015 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

Self Cite

View full text Add to dashboard Cite

This paper presents a comparison of three heuristic coefficients for the Uniform Theory of Diffraction (UTD), used to characterize the radiowave scattering in typical urban scenarios. The coefficients were implemented in a propagation model based on 3D ray-tracing techniques in an andean scenario. In order to evaluate each coefficient we analyze the statistical behavior of the mean and standard deviation of the absolute errors between the estimated values and the measured data of path loss in a large number of receptor points. Finally, we show the path loss prediction for each heuristic UTD coefficients proposed.

show abstract

“…For the scenarios of Cali and Valencia, a propagation model based on 3D ray launching by "brute-force," also known as shooting and bouncing ray (SBR), algorithm was used. The scenario was built using a 3D urban model supported in jMonkeyEngine and graphics processing unit (GPU) [17]. The number of interactions (reflections, diffractions, and combinations) used to model the multipath propagation was limited to five combinations in total.…”

Section: Valencia Spainmentioning

confidence: 99%

“…Most of the buildings and street materials in the two cities have the same constitutive parameters (i.e., permittivity, permeability, and rugosity). Specifically, we assumed brick (ε r = 7-j0.3, μ r = 1) for all building walls, a first type of dry concrete (ε r = 5.3-j0.25, μ r = 1) for all building roofs, and a second type of dry concrete (ε r = 7-j0.3, μ r = 1) for street pavement [17].…”

Section: Valencia Spainmentioning

confidence: 99%

Analysis of Heuristic Uniform Theory of Diffraction Coefficients for Electromagnetic Scattering Prediction

Tami

Rego

Ibarra

et al. 2018

International Journal of Antennas and Propagation

Self Cite

View full text Add to dashboard Cite

We discuss three sets of heuristic coefficients used in uniform theory of diffraction (UTD) to characterize the electromagnetic scattering in realistic urban scenarios and canonical examples of diffraction by lossy conducting wedges using the three sets of heuristic coefficients and the Malyuzhinets solution as reference model. We compare not only the results of the canonical models but also their implementation in real outdoor scenarios. To predict the coverage of mobile networks, we used propagation models for outdoor environments by using a 3D ray-tracing model based on a brute-force algorithm for ray launching and a propagation model based on image theory. To evaluate each set of coefficients, we analyzed the mean and standard deviation of the absolute error between estimates and measured data in Ottawa, Canada; Valencia, Spain; and Cali, Colombia. Finally, we discuss the path loss prediction for each set of heuristic UTD coefficients in outdoor environment, as well as the comparison with the canonical results.

show abstract

Measurement-based ray-tracing models calibration in urban environments

Abstract: The user has requested enhancement of the downloaded file.

Cited by 11 publications

References 5 publications

Localization Approach Based on Ray-Tracing Simulations and Fingerprinting Techniques for Indoor–Outdoor Scenarios

Localization Approach Based on Ray-Tracing Simulations and Fingerprinting Techniques for Indoor–Outdoor Scenarios

Heuristic UTD coefficients applied for the channel characterization in an andean scenario

Analysis of Heuristic Uniform Theory of Diffraction Coefficients for Electromagnetic Scattering Prediction

Contact Info

Product

Resources

About