Table of Contents
ITU-R Propagation Models and Prediction Methods for today’s Radiocommunication Systems
Why consider propagation?
Why consider propagation?
Principal categories of propagation effects
Variability in Propagation Medium
CATEGORY 1 Ground and Obstacles
Terrain Effects
Propagation over smooth Earth
Propagation over smooth Earth
Propagation over Irregular Terrain
Diffraction and Microwave Interference
Diffraction over Irregular Terrain
Diffraction in Microwave Interference (site shielding)
- Ground and obstacles - Effects of Buildings - Outside
Short-Range Outdoor Propagation
Outdoor Propagation Rec. P.1411
Over Rooftop Propagation
Street Canyon Propagation
Path Loss Models (Rec. P.1411)
Broadband Radio Access
Recommendation P.1410
Cumulative Coverage (Recommendation P.1410)
Effects of Buildings - Outside
Land Mobile-Satellite Propagation
Roadside Building-Shadowing Model
Roadside Building-Shadowing Model
Roadside Building-Shadowing Model
- Ground and obstacles - Effects of Buildings - inside
Indoor Propagation
Effects of Buildings - inside
Effects of Buildings – inside (Rec. P.1238)
- Ground and obstacles - Effects of Vegetation
Vegetation (shadowing by a palm tree)
Vegetation (shadowing by a pine tree)
Vegetation Effects on Slant Paths
Roadside Tree-Shadowing Model
Roadside Tree-Shadowing Model
Attenuation in Vegetation
Recommendation P.833
Specific Attenuation due to Woodland
Effects of Vegetation
2 Troposphere (clear air)
- Troposphere (clear air) - Gaseous absorption
Absorption by Atmospheric Gases
Attenuation by Atmospheric Gases
Attenuation by Atmospheric Gases
Atmospheric Gaseous Attenuation
- Troposphere (clear air) - Super-refraction and ducting
- Troposphere (clear air) - Super-refraction and ducting
Atmospheric Refractivity
Refractivity gradient in lowest 65m (10% time)
Refractivity Effects in Propagation
Refractivity Effects in Propagation
Super-refraction and ducting
Super-refractivity and ducting in Microwave Interference
Super-refraction and ducting (Rec. P.452)
3 Troposphere (non-clear air)
Rain Model
Rain Effects on Propagation
Cloud model
Rain and Cloud Attenuation
Rain and cloud attenuation
Rain and cloud attenuation
- Propagation considerations - Summary
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