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Comparison between different propagation models in urban environments using a digital database
1999 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

With the introduction of new digital broadcast systems like DAB (Digital Audio Broadcasting) and DTTV (Digital Terrestrial Television) the possibility of achieving an improved quality of reception in more difficult environments is enhanced. This applies to both mobile reception and portable indoor reception. Since the digital systems have a quite sharp quality threshold it is of great importance to be able to predict where reception is possible to dimension the networks correctly. The purpose of this thesis is to study and evaluate different radio wave propagation models that are suitable to use when calculating the radio coverage in an urban environment. The models that have been under study are the simple empirical Okumura-Hata model and three different half-empirical models. The empirical model does not demand a detailed description of the city under consideration, while the half-empirical ones have such demands. Detailed building databases over Uppsala and Stockholm have therefore been used with different resolutions (2.5*2.5 meters, 5*5 meters and 10*10 meters) to extract the parameters that the models use in their predictions. To evaluate the predictions some measurements have been made over the two areas.

Place, publisher, year, edition, pages
1999.
Keyword [en]
Technology, Radio, Propagation model, urban, building database, DAB, DTTV
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-51985ISRN: LTU-EX--99/223--SELocal ID: 925681f0-9a8f-4b70-bd60-04e1dc693622OAI: oai:DiVA.org:ltu-51985DiVA: diva2:1025351
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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