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

Earth-Satellite Propagation Effects Inside Buildings 8-29
Autocorrelation Coefficient
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
0 10 20 30 40 50 60 70 80 90 100
Lag (0.2% of Frequency)
Commons
EERL
Farmhouse
House
MER
Motel
Figure 8-20: The frequency autocorrelation at a fixed location in each building for
frequency lags from 0 to 20%. The lag of 10, for example, implies 10•0.002•f (MHz).
Table 8-16: Summary of median decorrelation bandwidths when all positions within
each building are considered.
Building Median Decorrelation Bandwidth (% frequency)
Commons 2.0
EERL 3.6
Farmhouse 20.2
House 1.6
MER 1.2
Motel 3.8
Overall Average without Farmhouse 2.4
Overall Average with Farmhouse 5.4
8.5 Building Attenuation at UHF, L- and S-Band Via Earth-Satellite
Measurements
In this section are described building attenuation measurements at 860 MHz, 1550 MHz,
and 2569 MHz using the Application Technology Satellite No. 6 (ATS-6) as the radiating
platform [Wells, 1977]. Transmissions at each of the frequencies were right-hand
circularly polarized and the receiving antenna was a vertically polarized azimuthally
omni-directional conical monopole located above a short ground plane. Measurements
were made on several wood-frame siding houses and several wood frame brick-veneer
houses in five geographic locations. The elevation angles at these location were 36.1°