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Wideband channel characterization : simulation and measurements analysis

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Lostanlen, Yves; D.Sc.
dc.contributor.author Dupuy, Florian
dc.date.accessioned 2011-12-08T09:52:50Z
dc.date.available 2011-12-08T09:52:50Z
dc.date.issued 2008
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/1104
dc.description.abstract The development of wireless telecommunication requires higher speed data rates. Wideband MIMO systems are a possible answer to that need. Both wideband and MIMO characteristics enhance multipath propagation, and require a precise knowledge of the channel to properly exploit their capabilities. The extraction of the channel parameters can be done from the measurements, but also from simulations. In the frame of this thesis, the possibility to use ray tracing to derive capacity coverage prediction is studied, based on the comparison with measurements. First the radio channel models are discussed, from the MIMO channel model to the ray tracing methods. Then the measurements methods and the algorithms extracting the channel parameters are presented, before focusing on a measurement campaign to compare prediction from ray tracing and measurements-based SAGE algorithm. Key parameters for capacity –delay spread and angular spread– were first compared, then capacity itself is introduced and a capacity comparison is conducted. Polarization influence on capacity is also studied, and different methods of emulating polarization on ray tracing are studied. Last but not least, the desired capacity coverage prediction is achieved on a wide area around the measurement streets. The simulation results with the ray tracing software are promising. The multipath components were predicted well enough by ray tracing to compute capacity. Then the polarization emulating methods gave interesting results: polarization influences capacity, and the derived capacity values were close enough to those computed from measurement to launch a capacity coverage calculation, first step toward a cellular planning based on MIMO capacity. However, some uncertainties are still left, due to computation time and models approximations. en
dc.format.extent 61
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.subject.other Electrical engineering en
dc.title Wideband channel characterization : simulation and measurements analysis en
dc.type G2 Pro gradu, diplomityö fi
dc.contributor.school Faculty of Electronics, Communications and Automation en
dc.contributor.school Elektroniikan, tietoliikenteen ja automaation tiedekunta fi
dc.contributor.department Department of Radio Science and Engineering en
dc.contributor.department Radiotieteen ja -tekniikan laitos fi
dc.subject.keyword ray tracing en
dc.subject.keyword SAGE en
dc.subject.keyword beamforming en
dc.subject.keyword radio channel modelling en
dc.subject.keyword MIMO en
dc.subject.keyword polarization en
dc.subject.keyword XPR en
dc.subject.keyword capacity en
dc.identifier.urn urn:nbn:fi:tkk-012408
dc.type.dcmitype text en
dc.programme.major Radio Engineering en
dc.programme.major Radiotekniikka fi
dc.programme.mcode S-26
dc.type.ontasot Diplomityö fi
dc.type.ontasot Master's thesis en
dc.contributor.supervisor Icheln, Clemens; Prof. (pro tem)
dc.programme Elektroniikan ja sähkötekniikan tutkinto-ohjelma fi
dc.location P1 fi
local.aalto.openaccess yes
local.aalto.digifolder Aalto_33640
dc.rights.accesslevel openAccess
local.aalto.idinssi 36595
dc.type.publication masterThesis
dc.type.okm G2 Pro gradu, diplomityö

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