Wideband and Ultrawideband Channel Models in Working Machine Environment
We present statistical models for wideband and ultrawideband (UWB) radio channels in a working machine cabin environment. Based on a set of measurements, it was found that such a small and confined space causes mostly diffuse multipath scattering rather than specular paths. The amplitude of the chan...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Modelling and Simulation in Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/702917 |
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| Summary: | We present statistical models for wideband and ultrawideband (UWB) radio channels
in a working machine cabin environment. Based on a set of measurements, it was found that such a small
and confined space causes mostly diffuse multipath scattering rather than specular paths. The amplitude
of the channel impulse responses in the wideband case is mostly Rayleigh distributed small-scale fading
signal, with only a few paths exhibiting Ricean distributions, whereas the ones in the UWB case tend to
be log-normally distributed. For the path amplitude, we suggest an exponential decay profile, which has
a constant slope in dB scale, with the corresponding parameters for the UWB case. For the wideband
case, a twofold exponential decay profile provides excellent fits to the measured data. It was also noted
that the root-mean-square (RMS) delay spread is independent of the line-of-sight/obstructed line-of-sight
situations of the channel. The multipath components contributing significant energy play a major role
in such a small environment if compared to the direct path. In addition, the radio channel gains are
attenuated with the presence of a driver inside the cabin. |
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| ISSN: | 1687-5591 1687-5605 |