Prof. dr hab. inż. Evgeny Ochin
Wybrane problemy informatyki i sieci komputerowych

CAD of Wireless NETs in Urban

Wave propagation in urban scenarios is dominated by multiple reflections (leading to waveguiding in street canyons) and multiple diffractions (around corners or above rooftops).

Ray optical propagation models suffer from long computation times. WinProp's unique 3D IRT with a single preprocessing of the building data reduces computation times for large urban areas to a few seconds.

With 3D IRT high accuracy and wideband channel charaterization (impulse response, delay spread,...) can be predicted in urban scenarios.

If path loss predictions are required for larger areas (50...400 km2), the urban dominant path model UDP is the best selection.

Input
3D Vector Building Databases
Cylinders with polygonal ground plane (flat roofs)
Individual material properties for each object
Including towers, courtyards and vegetation (trees) Topographical (DEM) Databases
Pixel databases (various formats, arbitrary resolutions) Transmitter Description
Tx power
Tx frequency
Antenna pattern (either 2x2D (e.g. *.msi, *.pln) or 3D)

Prediction Models
Empirical Models (Direct Ray)
Hata-Okumura and Walfisch-Bertoni
COST 231 Walfisch-Ikegami Deterministic Models (Path Searching)
Standard Ray Tracing (3D)
2x2D IRT (Ray Tracing with database preprocessing)
3D IRT (Ray Tracing with database preprocessing)
3D UDP (Urban Dominant Path Model)

Outputs
Maps (2D) for each prediction height
Path Loss / Received Power / Field Strength
Delay Spread
Angular Spread
Propagation Paths Diagrams for each location
Channel Impulse Response
Angular Profile (DoA for MS and BS) Statistical information
Distribution (PDF, CDF) of all maps (total area and parts of
Mean values and standard deviations (also for comparison

Prof. dr hab. inż. Evgeny Ochin Wybrane problemy informatyki i sieci komputerowych

Prof. dr hab. inż. Evgeny Ochin
Wybrane problemy informatyki i sieci komputerowych