Handbook of Propagation Effects for Vehicular and ... - Courses

Attenuation Due to Roadside Trees: Mobile Case 3-29
shown to exhibit more self-consistency, whereas the CEFM model distributions are noted
to cross over at approximately 10%.
Percentage of the Time Fade > Abscissa
100
9
8
7
6
5
4
3
2
10
9
8
7
6
5
1
4
3
2
60°
45°
30°
0 2 4 6 8 10 12 14 16 18 20 22 24
Fade Depth (dB)
Figure 3-26: Comparison of EERS model (solid) with CEFM model (dashed) results at
L-Band (1.5 GHz).
Percentage of the Time Fade > Abscissa
100
9
8
7
6
5
4
3
2
10
9
8
7
6
5
1
4
3
2
80°
Model Type
70°
CEFM
MERS
0 1 2 3 4 5 6 7 8
Fade Depth (dB)
Figure 3-27: EFM and MERS model values at 70° and 80° elevations at L-Band
(1.5 GHz).