Dit onderzoek concentreert zich op één specifiek hoge resolutie parameter extractie algoritme, met name het SAGE algoritme. Met dat algoritme kunnen we de verschillende aankomstrichtingen van elk belangrijk pad extraheren. Op die manier wordt niet alleen de azimuthhoek en de elevatiehoek, maar ook de tijdsvertraging (of de afstand), de Doppler frequentieverschuiving en de complexe amplitude (of het vermogen) zeer precies geschat. De nauwkeurigheid van de schattingen en de invloed van positiefouten en koppeling worden onderzocht. Het algoritme wordt uitgetest met simulaties en geverifieerd met meetdata, die bekomen werden in een binnenhuisconfiguratie op de universiteit van Kassel. In het geval van grote antenneroosters en voor breedbandige metingen worden er aanpassingen aan dit algoritme voorgesteld. Ook het stralingspatroon wordt toegevoegd in dit algoritme. Daarnaast komen de berekening en realisatie van twee van de vijf ideale uniform verdeelde bolvormige antenneroosters aan bod. Zij lossen hiermee de dubbelzinnigheid van de fase op, die ontstaat als de aankomstrichtingen geschat moeten worden in de drie dimensies.
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Δευτέρα 19 Σεπτεμβρίου 2016
High-resolution DOA extraction (for wireless communication systems): theoretical analysis and experimental verification
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