Urban Prediction Models

Comparison

 

Introduction

 
In the following, comparisons between urban prediction models for several scenarios are shown.

 

For the comparison, the following predictions models were used: A detailed comparison of these prediction models (also to several measurement campagins) can be found on the accuracy page.

 

Read more about the 3D Intelligent Ray Tracing.

Read more about the Urban Dominant Path Model.

Read more about the COST 231 Walfisch-Ikegami Model.

 

Scenario 1: Helsinki (Finland)
Size of predication area 1.2 km x 1.5 km = 1.8 kmē
Resolution 5 m
Pixels 72,000
Total number of buildings 228
Heights of topography no topography

 

  Urban Dominant Path Model 3D Ray Tracing COST 231 W.-I.
 
Accuracy high high limited

Computed results

 Signal Level (Path Loss)

 Signal Level (Path Loss)
Delay (Spread & Window)
Angular Spread
Impulse Response (complex, directional)

 Signal Level (Path Loss)
Propagation Paths Dominant Path Multiple Paths Over-rooftop in vertical plane

Preprocessing of Database

 not required once per database (several minutes, only IRT) not required

Prediction Time

less than one minute

IRT: less than one minute

SRT: several minutes

less than one minute

 

Scenario 2: Hong Kong (China)
Size of predication area 2 km x 2.6 km = 5.2 kmē
Resolution 10 m
Pixels 52,000
Total number of buildings 1403
Heights of topography 30 m to 460 m

 

  Urban Dominant Path Model 3D Ray Tracing COST 231 W.-I.
 
Accuracy high high limited

Computed results

 Signal Level (Path Loss)

 Signal Level (Path Loss)
Delay (Spread & Window)
Angular Spread
Impulse Response (complex, directional)

 Signal Level (Path Loss)
Propagation Paths Dominant Path Multiple Paths Over-rooftop in vertical plane

Preprocessing of Database

 not required once per database (several minutes, only IRT) not required

Prediction Time

some minutes

IRT: some minutes

SRT: several hours

less than one minute

 

Scenario 3: Munich (Germany)
Size of predication area 1.9 km x 2.8 km = 5.32 kmē
Resolution 10 m
Pixels 53,200
Total number of buildings 2087
Heights of topography 505 m to 521 m

 

  Urban Dominant Path Model 3D Ray Tracing COST 231 W.-I.
 
Accuracy high high limited

Computed results

 Signal Level (Path Loss)

 Signal Level (Path Loss)
Delay (Spread & Window)
Angular Spread
Impulse Response (complex, directional)

 Signal Level (Path Loss)
Propagation Paths Dominant Path Multiple Paths Over-rooftop in vertical plane

Preprocessing of Database

 not required once per database (several minutes, only IRT) not required

Prediction Time

some minutes

IRT: some minutes

SRT: several hours

less than one minute