Multiple reflections of radio waves in a corridor

Dersch, U.; Troger, J.; Zollinger, E.

doi:10.1109/8.362776

Cited by 14 publications

(9 citation statements)

References 7 publications

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“…We calculated the scattering functions [15] for two linear array geometries: 1) the scattering function for a linear array along the axis ( measurement positions) and 2) the scattering function for a linear array along the axis ( measurement positions). From the positions of the two maxima we determined the azimuth as 90 and the elevation as 25.8 .…”

Section: The Azimuth Anglementioning

confidence: 99%

“…OF THE DIFFERENT APPROACHES For validation and comparison of the three approaches, namely the scattering function [15], the 2-D Fourier analysis [7], and 2-D Unitary ESPRIT, we chose a measurement location where simple propagation conditions exist. The receiver was placed near the northwest end of Rue du Pont aux Choux (Position RX0 in Fig.…”

Section: Validation and Comparisonmentioning

confidence: 99%

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High-resolution 3-D direction-of-arrival determination for urban mobile radio

Fuhl

Rossi

Bonek

1997

IEEE Trans. Antennas Propagat.

158

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The in-depth knowledge of the mobile radio channel is particularly important for radio communication modeling and advanced technology system design. We propose an accurate method to determine jointly azimuth and elevation angle and the delay of waves incoming at the receiver. The method is applied to measurements of the complex impulse response of the mobile radio channel, performed on a planar array placed on a mobile in an urban cellular environment. The directionsof-arrival (DOA) were obtained by the means of a recently presented direction finding algorithm-Two-Dimensional (2-D) Unitary ESPRIT. Two-dimensional spatial smoothing as an extension of ordinary spatial smoothing is utilized to decorrelate coherent waves. The application of 2-D Unitary ESPRIT increases the angular resolution over conventional Fourier analysis or the scattering function by an order of magnitude and overcomes difficulties due to secondary lobes. The time delay is determined from wideband channel sounder measurements. The results confirm some assumptions on propagation mechanisms: 1) The wave-guiding property of streets (canyon effect), which is especially pronounced for long-delayed paths; 2) the variation of the number of incoming waves with their excess delay-the larger the excess delay, the lower the number of paths comprising an echo in the power delay profile; 3) if a single path remains, the privileged DOA is the direction of the street; 4) the exponential part of the power delay profile due to scatterers all around the receiver; and 5) the elevation dependence of the impinging power. In the tested receiver locations, paths with elevations between 0 and 40 dominate, containing about 90% of the received power.

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Section: The Azimuth Anglementioning

confidence: 99%

Section: Validation and Comparisonmentioning

confidence: 99%

High-resolution 3-D direction-of-arrival determination for urban mobile radio

Fuhl

Rossi

Bonek

1997

IEEE Trans. Antennas Propagat.

158

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“…In [5] and [6], the waveguide effect was identified through the path loss exponent, since it was found to be less than 2 (free space path loss exponent). Similarly in [7], the measured path loss was found to be smaller than the free space path loss, indicating the waveguide effect associated with propagation along corridors. In [8], the delay spread along a corridor was plotted against distance and the maximum delay spread was found to be 120ns.…”

Section: Introductionmentioning

confidence: 74%

Waveguide propagation effect along the cargo hull on board a ship

Mao

Lee

2009

2009 IEEE Antennas and Propagation Society International Symposium

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“…In [5], it was concluded from the small path loss obtained that the corridor can exhibit waveguide effects. In [6], the corridor was found to behave like a large waveguide since the measured loss is smaller than the free space path loss. Besides these analogues-waveguide structures, the heating, ventilation and air conditioning (HVAC) ducts in buildings have also been modelled as a multimode waveguide at high frequency [7].…”

Section: Introductionmentioning

confidence: 95%

“…The lift shaft and its associated lift car create an RF-harsh propagation environment [2]. In fact, the propagation environment of a lift shaft is similar to that of a tunnel or an indoor corridor; topics that are well-studied in the UHF band [3]- [6]. The waveguide mechanism for UHF communication within a tunnel has been identified since 1975 [3].…”

Section: Introductionmentioning

confidence: 97%

Propagation Modes and Temporal Variations Along a Lift Shaft in UHF Band

Mao

Lee

2010

IEEE Trans. Antennas Propagat.

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The guiding of electromagnetic waves along the lift shaft is studied and presented in this paper. Wideband channel sounding in UHF band along a lift shaft located in a complex environment has been conducted. Based on the measured delay in time of arrival, large structures that cause multipath clusters can be identified. The different propagation mechanisms associated with the lift shaft is then studied in detail. Analysis of the measurement results verifies the presence of electromagnetic waves being guided along the lift shaft. This guiding effect of the lift shaft is significant and is an important propagation mechanism. Temporal variation of the guided waves caused by different components of the lift shaft such as the lift door and the lift car has also been studied. Conclusions drawn from measurement results are validated using 3-D ray tracing simulation results. This research is useful for military applications such as urban warfare.Index Terms-Lift shaft, temporal variation, urban area, waveguide effect, 3-D ray tracing.

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Multiple reflections of radio waves in a corridor

Cited by 14 publications

References 7 publications

High-resolution 3-D direction-of-arrival determination for urban mobile radio

High-resolution 3-D direction-of-arrival determination for urban mobile radio

Waveguide propagation effect along the cargo hull on board a ship

Propagation Modes and Temporal Variations Along a Lift Shaft in UHF Band

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