Policy on Intellectual
Property Right (IPR)
Annex 1
1 Introduction
2 Propagation loss
2.1 Attenuation due to
atmospheric gases
2.2 Diffraction fading
2.2.1 Diffraction
loss dependence on path clearance
2.2.2 Planning
criteria for path clearance
2.3 Fading and
enhancement due to multipath and related mechanisms
2.3.1 Method
for small percentages of time
2.3.2 Method
for all percentages of time
2.3.3 Prediction
method for enhancement
2.3.4 Conversion
from average worst month to average annual distributions
2.3.5 Conversion
from average worst month to shorter worst periods of time
2.3.6 Prediction
of non-selective outage (see Note 1)
2.3.7 Occurrence
of simultaneous fading on multi-hop links
2.3.8 Statistical
data on the number of attenuation events lasting for 10 s or longer due to
multipath propagation
2.4 Attenuation due to
hydrometeors
2.4.1 Long-term
statistics of rain attenuation
2.4.2 Combined
method for rain and wet snow
2.4.3 Frequency
scaling of long-term statistics of rain attenuation
2.4.4 Polarization
scaling of long-term statistics of rain attenuation
2.4.5 Statistics
of event duration and number of events
2.4.6 Rain
attenuation in multiple hop networks
2.4.7 Prediction
of outage due to precipitation
3 Variation in
angle-of-arrival/launch
4 Reduction of cross-polar
discrimination (XPD)
4.1 Prediction of XPD
outage due to clear-air effects
4.2 Prediction of XPD
outage due to precipitation effects
4.2.1 XPD
statistics during precipitation conditions
4.2.2 Step-by-step
procedure for predicting outage due to precipitation effects
5 Distortion due to
propagation effects
5.1 Prediction of
outage in unprotected digital systems
6 Techniques for alleviating
the effects of multipath propagation
6.1 Techniques without
diversity
6.1.1 Increase
of path inclination
6.1.2 Reduction
of effect of surface reflections
6.1.3 Reduction
of path clearance
6.2 Diversity
techniques
6.2.1 Antenna
spacing in space diversity systems
6.2.2 Angular
spacing in angle-diversity and combined space/angle-diversity systems
6.2.3 Frequency
separation in frequency diversity systems
6.2.4 Space-diversity
improvement in narrow-band systems
6.2.5 Diversity
techniques in digital systems
7 Prediction of total outage
8 Propagation aspects of
bringing-into-service
Attachment 1 to Annex 1 Method for determining the geoclimatic factor, K,
from measured overland fading data