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

Fade and Non-Fade Durations and Phase Spreads 5-9
Percentage of Fade Durations > Abscissa
100
9
8
7
6
5
4
3
2
10
9
8
7
6
5
1
4
3
2
Distribution Type
Central MD 30°
Central MD 45°
Central MD 60°
ITU-R
England 40°
England 60°
England 80°
2 4 6 8 2 4 6 8 2 4 6 8
0.01 0.10 1.00 10.00
Fade Duration Distance (m)
Figure 5-6: Fade durations from different investigations (Figure 5-3 through Figure 5-5)
shown together.
Table 5-3: Summary of distance durations at probabilities of 50% and 10% for a fade
threshold of 5-6 dB at L-Band for various investigations.
Distribution
Duration Distance
dd (m)
P = 50% P = 10%
Elevation
(°)
Tree
Shadowing
ITU-R 0.22 1.04 51 Moderate to
Extreme
Central MD 0.22 1.26 30 POS=75%
0.15 0.83 45
0.12 0.59 60
England 0.05 0.25 40 POS=35% to
85%
0.04 0.13 60
0.02 0.05 80