Theoretical investigations and wideband measurements on wave propagation in hilly terrain

Liebenow, U.; Kuhlmann, P.

doi:10.1109/vetec.1994.345409

Cited by 12 publications

(2 citation statements)

References 3 publications

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“…In [16], as cited in [17], to 10 dB for steep cliffs with no trees. In [14], dB, whereas in [15], the same authors obtain dB. In [12] using data from [26] at 442 MHz, is in the range −13 to −19 dB.…”

Section: Literature Reviewmentioning

confidence: 97%

Prediction of multipath delay profiles in mountainous terrain

Driessen

2000

IEEE J. Select. Areas Commun.

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Abstract-Measurements of the complex impulse response of 900 MHz radio channels in mountainous terrain in British Columbia, Canada, are used to quantify values for the normalized scattering cross section 0 for mountains covered with evergreen trees. The bistatic radar equation is then used in a propagation model to predict characteristics of the impulse response in similar terrain from topographical data.Three-dimensional (3-D) propagation models for mountainous areas are important, because such areas stress to the limit the multipath handling capabilities of most air interfaces. 0 is related to a more fundamental characteristic of the surface via Lambert's law. The measured value of is −21.1 ± 2.9 dB, which is similar to some of the very few other values found in the literature. Using this value of , the predicted multipath delay profiles correspond well with measurements. The results can be used to predict complex impulse responses in mountainous terrain which may be convolved with a simulated data stream to predict error rate, outage or other aspects of wireless system performance.

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Section: Literature Reviewmentioning

confidence: 97%

Prediction of multipath delay profiles in mountainous terrain

Driessen

2000

IEEE J. Select. Areas Commun.

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“…Recently, considerable effort has been invested in developing propagation prediction models for both micro and macrocellular environments ([1], [2], [3], [4], [5]). Whereas the microcellular models tend to only consider small urban areas with buildings and flat terrain, the macrocellular models consider rural areas with variable terrain height but no specific buildings.…”

Section: Introductionmentioning

confidence: 99%

The use of measurement data to analyse the performance of rooftop diffraction and foliage loss algorithms in a 3-D integrated urban/rural propagation model

Tameh

Nix

VTC '98. 48th IEEE Vehicular Technology Conference. Pathway to Global Wireless Revolution (Cat. No.98CH36151)

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This paper describes a 3-D integrated propagation model, which considers propagation effects in both urban and rural environments. It uses a variable resolution Digital Terrain Map (DTM) as well as building and foliage databases. Scattering off terrain pixels and building walls is modelled, as are off-axis terrain and rooftop diffraction contributions. The scattered power is estimated from radar cross-section analysis of the illuminated pixels and walls. The effects of foliage attenuation are also fully considered. The model predicts signal strength and time dispersion and provides fading and arrival angle information for the propagation channel.Narrowband measurements in both urban and rural areas show very good agreement with the predicted results. The accuracy of different foliage-loss and diffraction-loss models has been assessed, with the ITU-R foliage-loss model and the UTD model giving the best results. It is shown that large errors can result if the effects of foliage are ignored in the modelling process. 0-78034320-4/98/$5.00 0 1998 IEEE

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