Propagation mechanisms in microcell and indoor environments

Dersch, U.; Zollinger, E.

doi:10.1109/25.330169

Cited by 86 publications

(30 citation statements)

References 12 publications

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“…In order to trace the ray paths, in this model a technique based on the electromagnetic theory of images [3], [5], [7], [8] has been developed. Rather than using the "ray launching" approach [6], [19] where rays are sent out at various angles and their paths are traced until a certain power threshold is reached, the technique adopted here considers all walls and obstacles as potential reflectors and evaluates the location of their base station images.…”

Section: B the Path Generatormentioning

confidence: 99%

A microcellular ray-tracing propagation model and evaluation of its narrow-band and wide-band predictions

Athanasiadou

Nix

McGeehan

2000

IEEE J. Select. Areas Commun.

137

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Abstract-Due to the site specific nature of microcellular operational environments, propagation models are required to take into account the exact position, orientation and electrical properties of individual buildings, and hence, ray tracing techniques have emerged as the dominant methods to predict propagation in such environments. A novel hybrid three-dimensional (3-D) ray tracing algorithm which can evaluate scenarios incorporating many thousands of objects by utilising the concept of "illumination zones," is presented in this paper.In order to evaluate the accuracy of the presented model, comparisons of narrow-band and wide-band predictions with measurements are performed for a variety of scenarios. First, power comparisons show that very accurate predictions can be achieved (rms errors less than 3.7 dB). Then, wide-band analysis shows that since the rms delay spread for systems with finite bandwidth is a function of the multipath phase, only average measured and predicted rms delay spread values can be compared and as a result, limited averaging can produce large rms errors. With sufficient averaging the achieved wide-band accuracy in terms of the predicted rms delay spread, is adequate for most planning purposes.Index Terms-Narrow-band and wide-band radio channel measurements and predictions, propagation modeling, ray tracing.

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Section: B the Path Generatormentioning

confidence: 99%

A microcellular ray-tracing propagation model and evaluation of its narrow-band and wide-band predictions

Athanasiadou

Nix

McGeehan

2000

IEEE J. Select. Areas Commun.

137

View full text Add to dashboard Cite

show abstract

“…In order to trace the ray paths, in this model a technique based on the electromagnetic theory of images [3], [4] has been developed. Rather than using the ray launching approach [5], [8], where rays are sent out at various angles and their paths are traced until a certain power threshold is reached, the technique adopted here considers all walls and obstacles as potential reflectors and evaluates the location of their base-station images.…”

Section: B the Path Generatormentioning

confidence: 99%

A novel 3-D indoor ray-tracing propagation model: the path generator and evaluation of narrow-band and wide-band predictions

Athanasiadou

Nix

2000

IEEE Trans. Veh. Technol.

100

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Abstract-A novel three-dimensional (3-D) ray-tracing model capable of supporting detailed representation of the indoor environment, as well as external building structures, is presented in this paper. The developed algorithm uses a hybrid imaging technique where the two-dimensional (2-D) image generations in vertical and horizontal planes are combined to produce 3-D paths. It also employs the concept of "illumination zones" of the images which greatly simplifies the image map and allows the evaluation of complex indoor scenarios.In order to investigate the accuracy of the presented model, comparisons of predictions with narrow-band and wide-band measurements are performed in line-of-sight (LOS), non-LOS (NLOS), and deep shadow areas, both for co-and cross-polarized antennas. The analysis shows that accurate power predictions can be achieved for both antenna polarizations with rms errors less than 7 dB, even when long sections of the test route are in deep shadow areas. There is a trend agreement between the simulated and measured channel impulse responses, while the rms delay spread in NLOS areas is predicted with less than 5-ns rms error (or better than 13% normalized mean error). The paper provides an insight into the real and the modeled radio channel.Index Terms-Narrow-band and wide-band indoor radio channel measurements and predictions, propagation modeling, ray tracing.

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“…For the measurements, a sliding correlator radio channel sounder, which is based on the well-known pseudo noise (PN) correlation method [2], [3] was used. The system is capable of measuring complex impulse responses (CIR) with a time resolution of 20 ns and a dynamic range of 40 dB.…”

Section: Measurement Systemmentioning

confidence: 99%

On Obtaining Wideband Directional Channel Realizations From Single-Antenna Channel Sounding and Simple Ray Tracing

Martijn

Herben

2005

Antennas Wirel. Propag. Lett.

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2005). On obtaining wideband directional channel realizations from single-antenna channel sounding and simple ray-tracing. IEEE Antennas and Wireless Propagation Letters, 4(1), 463-466. DOI: 10.1109/LAWP.2005 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-In this letter, it is demonstrated that the dominant multipath radio waves predicted with simple ray tracing show a good match in the time domain with those obtained from complex impulse response measurements along outdoor trajectories. By combining the measured intensities and delays of these dominant multipath components with their angles-of-arrival and angles-of-departure obtained from the ray tracer, good wideband directional channel realizations can be derived.

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Propagation mechanisms in microcell and indoor environments

Cited by 86 publications

References 12 publications

A microcellular ray-tracing propagation model and evaluation of its narrow-band and wide-band predictions

A microcellular ray-tracing propagation model and evaluation of its narrow-band and wide-band predictions

A novel 3-D indoor ray-tracing propagation model: the path generator and evaluation of narrow-band and wide-band predictions

On Obtaining Wideband Directional Channel Realizations From Single-Antenna Channel Sounding and Simple Ray Tracing

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