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Chapter 3
Attenuation Due to Roadside Trees: Mobile Case
3.1
Background
3.2
Time-Series Fade Measurements
3.3
Extended Empirical Roadside Model
3.3.1
Background
3.3.2
EERS Formulation
3.3.3
Step by Step Implementation of the EERS Model
3.3.4
Example Plots
3.4
Validation of the Extended Empirical Roadside Shadowing Model
3.4.1
Central Maryland at L-Band
3.4.2
Australian Fade Distributions at L-Band
3.4.3
Austin, Texas at K-Band
3.4.4
Low Angle Measurements in Washington State at L-Band
3.4.5
Low Elevation Angle Measurements at K-Band in Alaska
3.4.6
K-Band Measurements in Central Maryland
3.4.7
Comparison with ESA K-Band Measurements
3.5
Attenuation Effects of Foliage
3.5.1
K-Band Effects
3.5.2
UHF (870 MHz)
3.6
Frequency Scaling Considerations
3.7
Comparison of EERS Model with Other Empirical Models
3.7.1
Modified Empirical Roadside Shadowing Model (MERS)
3.7.2
Empirical Fading Model (EFM)
3.7.3
Combined Empirical Fading Model (CEFM)
3.7.4
ITU-R Fade Model at Elevation Angles above 60°
3.7.5
Comparative Summary of Model Limits
3.8
Conclusions and Model Recommendations
3.9
References
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