Impact of road surfaces on millimeter-wave propagation

Schneider, Robert; Didascalou, D.; Wiesbeck, W.

doi:10.1109/25.875249

Cited by 44 publications

(25 citation statements)

References 5 publications

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“…Also, the statistical road unevenness leads to deviations from specular reflections. Therefore, modified Fresnel equations have to be used for reflections on roads [6].…”

Section: Multipaths Over Roadsmentioning

confidence: 99%

Analysis of multipath and DOA detection using a fully polarimetric automotive radar

Visentin

Hasch

Zwick

2018

Int. J. Microw. Wireless Technol.

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Multipath propagation occurs in many situations of radar measurements in complex environments. The unwanted effects range from interference over the radar channels, which causes amplitude fading and a corrupted direction of arrival (DOA) estimation, to the detection of ghost targets in an angle of arrival of the multipath direction. Due to the different number of reflections, polarimetric radars are capable to separate certain multipaths from direct paths if the target is known in advance. Furthermore, it is possible to separate objects with different polarimetric features in DOA that are located in the same radial distance to the radar. In this paper, a new approach to DOA detection based on the coherent Pauli decomposition is presented. With this approach, important multipath and DOA effects are analyzed and measurement results at 77 GHz on canonical objects in an anechoic chamber are presented. The results prove the feasibility of the approach and demonstrate the occurring effects.

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“…Also, the statistical road unevenness leads to deviations from specular reflections. Therefore, modified Fresnel equations have to be used for reflections on roads [6].…”

Section: Multipaths Over Roadsmentioning

confidence: 99%

Analysis of multipath and DOA detection using a fully polarimetric automotive radar

Visentin

Hasch

Zwick

2018

Int. J. Microw. Wireless Technol.

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“…It contains the parameters of the permittivity, the roughness and the loss. For the simulation, a ground floor was added to take multipath propagation effects also into account [18].…”

Section: Ray-tracing Simulationmentioning

confidence: 99%

Extraction of Virtual Scattering Centers of Vehicles by Ray-Tracing Simulations

Schuler¹,

Becker

Wiesbeck

2008

IEEE Trans. Antennas Propagat.

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Abstract-Radar images of complex targets can be understood as a superposition of the reflected signals from a high number of scattering centers. To model complex targets for radar simulations, the plurality of scattering centers should be reduced to few significant scattering centers in order to minimize computational effort. The scope of this work is to present a technique to generate a significantly simplified RCS model of the vehicle with a limited number of virtual scattering centers, each with its own scattering characteristic, and how to group these scattering centers in a cluster database. The work is based on ray-tracing simulations of complex vehicle models. The ray-tracing simulations have been validated by measurements. The scattering centers may not be physically existing strong scattering centers, but virtual scattering centers representing a certain scattering behavior. In this paper, a technique for extracting such virtual scattering centers from a complex 3D-vehicle-model is presented. It is based on ray-tracing simulations of such models. As an example, the design model of a Ford Focus is used.

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“…Feasibility studies on advanced features of future LRR sensor applications have pointed out that preceding vehicles, which are optically hidden by other ones, can be detected by radar due to multipath propagation effects [6], [7]. This information can be very helpful to improve traffic scenario interpretation, if reliably available.…”

Section: B Sensitivity Requirements Of Future Lrr Sensorsmentioning

confidence: 99%

KOKON - automotive high frequency technology at 77/79 GHz

Schneider¹,

Blöcher²,

Strohm³

2007

2007 European Microwave Conference

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In future all automotive long and short range radar systems in Europe have to operate in the frequency range 76-81 GHz due to the European radar frequency regulation. For the development of future low-cost, high-performance and highly reliable radar systems the joint project KOKON was initiated. This contribution introduces the objectives of KOKON and presents current results achieved including sensor specification with respect to automotive applications, chip technology development, and realization of first sensor prototypes.

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Impact of road surfaces on millimeter-wave propagation

Cited by 44 publications

References 5 publications

Analysis of multipath and DOA detection using a fully polarimetric automotive radar

Analysis of multipath and DOA detection using a fully polarimetric automotive radar

Extraction of Virtual Scattering Centers of Vehicles by Ray-Tracing Simulations

KOKON - automotive high frequency technology at 77/79 GHz

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