Implementation of a 3D terrain-dependent Wave Propagation Model in WRAP
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The radio wave propagation prediction is one of the key elements for designing an efficient radio network system. WRAP International has developed a software for spectrum management and radio network planning.This software includes some wave propagation models which are used to predict path loss. Current propagation models in WRAP perform the calculation in a vertical 2D plane, the plane between the transmitter and the receiver. The goal of this thesis is to investigate and implement a 3D wave propagation model, in a way that reflections and diffractions from the sides are taken into account.The implemented 3D wave propagation model should be both fast and accurate. A full 3D model which uses high resolution geographical data may be accurate, but it is inefficient in terms of memory usage and computational time. Based on the fact that in urban areas the strongest path between the receiver and the transmitter exists with no joint between vertical and horizontal diffractions , the radio wave propagation can be divided into two parts, the vertical and horizontal part. Calculations along the horizontal and vertical parts are performed independently, and after that, the results are combined. This approach leads to less computational complexity, faster calculation time, less memory usage, and still maintaining a good accuracy.The proposed model is implemented in C++ and speeded up using parallel programming techniques. Using the provided Stockholm high resolution geographical data, simulations are performed and results are compared with real measurements and other wave propagation models. In addition to the path loss calculation, the proposed model can also be used to estimate the channel power delay profile and the delay spread.
Place, publisher, year, edition, pages
2014. , 69 p.
radio wave propagation models, WRAP International, geographical data, reflection, diffraction, path loss, power delay profile, delay spread
IdentifiersURN: urn:nbn:se:lnu:diva-36774OAI: oai:DiVA.org:lnu-36774DiVA: diva2:744430
WRAP International AB
Subject / course
Electrical Engineering with specialisation in Signal Processing & Wave Propagation, Master Programme, 120 credits
2014-09-04, B3033, 351 95 Växjö, Växjö, 13:15 (English)
Carlsson, OlovThomasson, Anders
Sandström, Sven-Erik, Professor