Show simple item record Ratnapala, ENPK 2011-03-30T06:49:22Z 2011-03-30T06:49:22Z
dc.description.abstract Electromagnetic Compatibility (EMC) analysis involved in the planning process of a FM broadcasting service is an intricate and complex procedure, which is dependant fully on the propagation prediction models. For these predictions theoretical and empirical models are used. But the applicability, approach, complexity and the accuracy of each of these models can differ by a wide margin, producing lack of confidence and higher degree of uncertainty. Therefore choosing a model for a specific EMC Analysis with the required accuracy is of primary concern.// Most of these models have been developed in many parts of the world. Stringent validation of these models as distinct to the Sri Lankan environment is an essential requirement by testing on locally collected data. But apparently due to the extent of measurement and analysis facilities required this had been a minority activity.// In this research work the applicability of generally acceptable empirical and theoretical propagation models such as free space(L,..). plane earth (L,,) modified plane earth (/,,,), Max (L,.,LP) Max (LF,Lr), ITU PN 370-6, FCC are compared for their performance for typical rough and irregular terrain commonly found in Sri Lanka by observing the received signals of FM sound broadcast transmissions originating from Nuwara Eliya and Colombo.// The results show that theoretical model Max (LF,LP). is the most accurate model for FM broadcast environment in Sri Lanka. It is seen that this model, yields most accurate results even in irregular terrain with Epstein Peterson diffraction correction
dc.format.extent vi, 86p. : charts ; tables en_US
dc.language.iso en en_US
dc.title Estimation of propagation characteristics in the FM environment
dc.identifier.faculty Engineering en_US MEng en_US
dc.identifier.department Department of Electronic and Telecommunication Engineering en_US 2002-12
dc.identifier.accno 77709 en_US

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