Title | ||
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Measurements, modeling and simulations of the UWB propagation channel based on direct-sequence channel sounding |
Abstract | ||
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The paper presents the statistical model for the ultra-wideband (UWB) indoor channel having a bandwidth of 2.4 GHz and a central frequency of 4.78 GHz. The model is based on propagation experiments performed in different rooms on a floor of an office-laboratory building. Within each room the receiver antenna is automatically moved over a square grid of 25 x 25 locations spaced 2cm apart. A correlative channel sounding technique is employed; actually the carrier is modulated by a train of short duration (0.4 ns) pulses shaped by a PN-sequence. After coherently demodulating the detected signals and removing the PN-sequence modulation, we post-process the extracted channel impulse responses by best-fit procedures to set up a statistical tapped delay line model (STDL) of the UWB indoor channel. We characterize the path loss for line-of-sight (LOS) and non-line-of-sight (NLOS) conditions by distance-power laws and the shadowing by lognormal distributions. A clustered structure is observed in the average power-delay profiles; rays arrive at the receiver in groups, exponentially decaying with different decay constants. The small-scale effects are modeled by the Gamma distribution since it verifies with a 95%-confidence interval both the Chi-Square test and the Kolmogorov-Smirnov test applied to the experimental data.. The shape parameters of such Gamma distributions are truncated Gaussian variables spreading in the range from 1 to 3. An implementation of the derived STDL model is finally proposed and a comparison between the simulated and the measured statistics is performed proving the validity of our approach. Copyright (c) 2005 John Wiley & Sons, Ltd. |
Year | DOI | Venue |
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2005 | 10.1002/wcm.308 | WIRELESS COMMUNICATIONS & MOBILE COMPUTING |
Keywords | Field | DocType |
statistical channel model,UWB channel simulation,UWB propagation measurements | Non-line-of-sight propagation,Telecommunications,Computer science,Channel sounding,Communication channel,Modulation,Bandwidth (signal processing),Path loss,Statistical model,Gamma distribution,Acoustics,Distributed computing | Journal |
Volume | Issue | ISSN |
5.0 | 5.0 | 1530-8669 |
Citations | PageRank | References |
1 | 0.63 | 2 |
Authors | ||
2 |
Name | Order | Citations | PageRank |
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Dajana Cassioli | 1 | 94 | 16.08 |
Annalisa Durantini | 2 | 30 | 7.13 |