AAU Student Projects - visit Aalborg University's student projects portal
A master's thesis from Aalborg University
Book cover


Modelling The Indoor Broadband Channel

Author

Term

10. term

Publication year

2011

Submitted on

Pages

65

Abstract

Dette projekt undersøger en 3D ray tracing-model for indendørs radioudbredelse baseret på geometrisk optik og Uniform Theory of Diffraction (UTD). Med AWE-Communication-værktøjet kan man sætte et variabelt maksimum for, hvor mange refleksioner og diffraktioner der indgår, hvilket giver forudsigelser af path loss (signaldæmpning), impulssvar (hvordan flervejssignaler ankommer over tid) og vinkelspredning (variation i ankomstvinkler). Vi beskriver først flere velkendte indendørsmodeller, som værktøjet understøtter, og fokuserer derefter på intelligent ray tracing til nærmere analyse. Vi undersøger de forudsagte kanalkarakteristika og sammenligner dem med målinger fra AAU-NOVI-2-bygningen. Selvom ray tracing forventes at afspejle virkelige forhold, viser undersøgelsen, at den forudsagte feltstyrke ikke altid stemmer præcist med de målte værdier på visse steder.

This project studies a 3D ray tracing model for indoor radio propagation based on geometrical optics and the Uniform Theory of Diffraction (UTD). Using the AWE-Communication tool, we can set a variable maximum for how many reflections and diffractions are included, yielding predictions of path loss (signal attenuation), impulse responses (how multipath signals arrive over time), and angular spread (variation in arrival angles). We first describe several well-known indoor models supported by the tool, then focus on intelligent ray tracing for deeper analysis. We examine the predicted channel characteristics and compare them with measurements from the AAU-NOVI-2 building. Although ray tracing is expected to closely reflect real conditions, our investigation shows that at certain locations the predicted field strength does not precisely match the measured values.

[This abstract was generated with the help of AI]