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

Theoretical Modeling Considerations 11-21
Probability(%) Fade > Abscissa
100
90
80
70
60
50
40
30
20
10
9
8
7
6
1
5
4
3
2
Light Shadowing
Shadowing Occurrence
Infrequent (S=0.25)
Moderate (S=0.5)
Frequent (S=0.75)
Heavy Shadowing
0 2 4 6 8 10 12 14 16 18 20
Fade Depth (dB)
Figure 11-2: Typical fade distributions calculated from the Simplified Lognormal
K = 22 dB,
K = 18dB,
m = −1dB,
s = 0.
5dB
and heavy
Shadowing Model for light ( )
( K 13 dB,
K = 12dB,
m = −10dB,
s = 3.
5dB)
= shadowing, and for infrequent (I; S = 0.25),
moderate (M; S = 0.5), and frequent (F; S = 0.75) shadowing occurrences.
Probability(%) Fade > Abscissa
100
90
80
70
60
50
40
30
20
10
9
8
7
6
1
5
4
3
2
Shadowing Occurrence
Infrequent (S=0.25)
Moderate (S=0.5)
Frequent (S=0.75)
Medium Heavy Shadowing
0 2 4 6 8 10 12 14 16 18 20
Fade Depth (dB)
Figure 11-3: Typical fade distributions calculated from the Simplified Lognormal
Shadowing Model for medium ( K = 17 . 5dB,
K = 15dB,
m = −5.
5dB,
s = 2dB)
shadowing,
and for infrequent (I; S = 0.25), moderate (M; S = 0.5), and frequent (F; S = 0.75)
shadowing occurrences.