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

12-20
Propagation Effects for Vehicular and Personal Mobile Satellite Systems
Table 12-7: Tabulation of azimuth averaged values of C, S,
and B in (12-28) for
different elevation angle intervals for urban Japan.
Elevation Angle Interval (°) C S B
0-4 0.02 0.03 0.95
5-9 0.07 0.06 0.86
10-14 0.17 0.08 0.75
15-19 0.28 0.08 0.64
20-24 0.37 0.08 0.56
25-29 0.44 0.07 0.48
30-34 0.51 0.07 0.42
35-39 0.58 0.06 0.36
40-44 0.63 0.06 0.31
45-49 0.67 0.05 0.27
50-54 0.72 0.05 0.23
55-59 0.76 0.04 0.20
60-64 0.80 0.03 0.17
65-69 0.83 0.03 0.14
70-74 0.86 0.03 0.11
75-79 0.89 0.02 0.09
80-84 0.92 0.02 0.06
85-89 0.93 0.02 0.06
12.10.2 Probability Distributions and Diversity Gains
Probability distributions and diversity gains derived employing the above-described
methodology have been described in Section 12.6.5 (Figure 12-3 and Figure 12-4).
12.10.3 Suggestions for Future Work
Although the above method has been validated using measurements for Japan, it is
suggested that it be validated against existing measurements, such as in Central Maryland
for tree-lined roads and in mountainous terrain. Extension of the methodology to
frequencies other than L-Band is also suggested.
12.11 Theoretical Modeling Considerations (Chapter 11)
A variety of LMSS models are available to the systems designer, with three main classes
of models being (1) empirical regression models, (2) probability distribution models and
(3) geometric-analytic models. Empirical regression models provide simple functions for
probability distributions of fades based on experimental measurements. Statistical