Polarization Behavior of Discrete Multipath and Diffuse Scattering in Urban Environments at 4.5 GHz

Landmann, Markus; Sivasondhivat, Kriangsak; Takada, Jun‐ichi; Ida, Ichirou; Thomä, Reiner S.

doi:10.1155/2007/57980

Cited by 58 publications

(27 citation statements)

References 6 publications

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“…10, are originated by reflections from a metal room divider behind the wall in that direction. This is consistent with similar observations reported in [24]. While the first power cluster arriving from can be associated with MPCs with coand cross-polarized components as shown in Fig.…”

Section: B the Received Power Characterizationsupporting

confidence: 93%

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

Gurrieri

Willink

Petosa

et al. 2008

IEEE Trans. Antennas Propagat.

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Abstract-A high-resolution channel sounding technique has been used to investigate the cross-polarization of electromagnetic waves in the 5-6 GHz band. Experiments were performed in two non-line-of-sight indoor locations, and it was found that there is a strong dependency of the cross-polarization of multipath components on the elevation angle-of-arrival. For a vertically polarized transmitting antenna, clusters of co-polarized multipath components were confined predominantly to the region around the horizontal plane that contains the virtual line-of-sight between transmitter and receiver. In contrast, cross-polarized signals were detected for a variety of elevation angles with considerable power levels. The surroundings of the receiver were identified as the principal source of depolarized signals. In addition, time dispersion analysis of the multipath signals led to the determination of the AoAs where there is a strong correspondence between co-and cross-polarized signals as a consequence of the partial depolarization of MPCs. This work supports the exploitation of the joint space and polarization diversities in indoor propagation scenarios to improve the system performance.

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Section: B the Received Power Characterizationsupporting

confidence: 93%

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

Gurrieri

Willink

Petosa

et al. 2008

IEEE Trans. Antennas Propagat.

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“…Because the available information and modeling strategies of dense and specular multipath components differ, well-known radio channel parameters have to now be evaluated for both types of multipath separately. The effect of dense multipath components has been investigated on, e.g., the angular channel characteristics in [4], [5], the polarization channel characteristics in [6], [7], the multipath clustering behavior in [8], and the channel capacity in [9].…”

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confidence: 99%

Experimental Analysis of Dense Multipath Components in an Industrial Environment

Tanghe

Gaillot

Liénard

et al. 2014

IEEE Trans. Antennas Propagat.

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Abstract-This work presents an analysis of Dense MultipathComponents (DMC) in an industrial workshop. Radio channel sounding was performed with a vector network analyzer and virtual antenna arrays. The specular and dense multipath components were estimated with the RiMAX algorithm. The DMC covariance structure of the RiMAX data model was validated. Two DMC parameters were studied: the distribution of radio channel power between specular and dense multipath, and the DMC reverberation time. The DMC power accounted for 23 to 70% of the total channel power. A significant difference between DMC powers in line-of-sight and non-line-of-sight was observed, which can be largely attributed to the power of the line-of-sight multipath component. In agreement with room electromagnetics theory, the DMC reverberation time was found to be nearly constant. Overall, DMC in the industrial workshop is more important than in office environments: it occupies a fraction of the total channel power that is 4 to 13% larger. The industrial environment absorbs on average 29% of the electromagnetic energy compared to 45-51% for office environments in literature: this results in a larger reverberation time in the former environment. These findings are explained by the highly cluttered and metallic nature of the workshop.

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“…The weighted XPRX C was used instead of averagingX l since paths with higher path gains are more important [30].…”

Section: A Prediction Of Received Power Utilizing Directional Paramementioning

confidence: 99%

Analysis of DSRC Service Over-Reach inside an Arched Tunnel

Ching

Ghoraishi

Lertsirisopon

et al. 2007

IEEE J. Select. Areas Commun.

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Abstract-In this paper, the prediction of received power in the out-of-zone of a Dedicated Short Range Communications (DSRC) system operating inside a typical arched highway tunnel is discussed. By conducting wideband directional channel sounding inside the tunnel, the gain, angle-of-arrival and delay of each propagation path are estimated by means of a multidimensional maximum likelihood estimation algorithm from the measured data. Using these estimated parameters and by employing simulations of application antennas according to the DSRC standard, the received power in the out-of-zone is predicted for 2 roadside unit (RSU) antenna positions. The dominant scatterers causing the over-reach of radiated power to the out-ofzone were identified and attributed to the ground and sidewalk. These scatterers can affect the received power level in the outof-zone by as much as 10 dB. It can therefore be concluded that suppressing ground and sidewalk scatterings in the vicinity of RSU by installing composite pavement materials are needed to increase the electromagnetic absorption in order to guarantee DSRC services.

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Polarization Behavior of Discrete Multipath and Diffuse Scattering in Urban Environments at 4.5 GHz

Cited by 58 publications

References 6 publications

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

Characterization of the Angle, Delay and Polarization of Multipath Signals for Indoor Environments

Experimental Analysis of Dense Multipath Components in an Industrial Environment

Analysis of DSRC Service Over-Reach inside an Arched Tunnel

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