Branch : Computer Science and Engineering
Subject : Wireless Communication
Ray Tracing and Site Specific Modeling
Ray Tracing and Site Specific Modeling
- New methods for predicting radio signal coverage involve the use of Site Specific (SISP) propagation models and graphical information system (GIS) databases.
- SISP models support ray tracing as—a means of deterministically modeling any indoor or outdoor propagation environment. Through the use of building databases, which may be drawn or digitized using standard graphical software packages, wireless system designers are able to include accurate representations of building and terrain features
- For outdoor propagation prediction, ray tracing techniques are used in conjunction with aerial photographs so that three-dimensional (3-D) representatior1s of buildings may be integrated with software that carries out reflection, diffraction, and scattering models
- Photogrammetric techniques are used to convert aerial or satellite photographs of cities into usable 3-D databases for the models
- As building databases become prevalent, wireless systems will be developed using computer aided design tools that provide deterministic, rather than statistical, prediction models for large-scale path loss in a wide range of operating environments.