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Filter z delci za lokalizacijo v brezžičnih senzorskih omrežjih = Particle filter for localization in wireless sensor networks : [doktorska disertacija]Svečko, Janja, 1983-Doktorska disertacija predstavlja algoritem za določanje razdalje med slepim vozliščem in referenčnim vozliščem v brezžičnem senzorskem omrežju (ang. Wireless Sensor Network - WSN) z zajemanjem ... meritev indikatorja moči sprejetega signala (ang. Received Signal Strength Indicator - RSSI) na antenskem sklopu sprejemnika. Za ocenjevanje razdalj smo v doktorski disertaciji uporabili Bayesovo sklepanje in filter z delci (ang. particle filter). Z Bayesovim sklepanjem prvega reda in s predhodno izbranim modelom širjenja signala (log-normalni model ali odbojni model) smo določili razdaljo iz zajetih meritev RSSI. Apriorno verjetnost v Bayesovem sklepanju smo modelirali z Gauss-Markovimi naključnimi polji (ang. Gauss-Markov Random Field- GMRF), za opis verjetja pa je bila uporabljena Gamma porazdelitvena funkcija. Ocena razdalje je izvedena s cenilko največje posteriorne verjetnosti (ang. Maximum a posterior - MAP). Bayesovo sklepanje drugega reda,pri katerem smo vrednotili maksimirane robne porazdelitve, smo uporabili za določitev najboljših parametrov apriorne verjetnosti in stopnjo modela oziroma števila anten antenskega sklopa. Za nadaljnjo oceno razdalje smo uporabili filter z delci z metodo prevzorčenja (ang. Sequential Importance Resampling - SIR). Znotraj filtra smo za postopek tipanja uporabili Gaussovo porazdelitveno funkcijo in za posodobitev uteži primerjali med uporabo Gamma porazdelitvene funkcije in Gaussove funkcije. Eksperimentalni rezultati v doktorski nalogi, ki zajemajo realne meritve RSSI-jev in ocenjene razdalje z Bayesovim sklepanjem in filtra z delci, nam kažejo, da je možno oceniti razdaljo med slepim in referenčnim vozliščem 0,03 m natančno. Pri tem je natančnost metode odvisna od samega prostora in odbojev v njem ter od uporabljenih modelov in strojne opreme. Natančnost oziroma napaka je podana kot absolutna vrednost razlike dejanske in ocenjene razdalje.Type of material - dissertation ; adult, seriousPublication and manufacture - [Maribor : J. Svečko, 2012]Language - slovenianCOBISS.SI-ID - 264239104
Link(s):
Digital Library of the University of Maribor – DLUM
Digitalna knjižnica Slovenije - dLib.siDostop z namenskih računalnikov v prostorih NUK
Author
Svečko, Janja, 1983-
Other authors
Gleich, Dušan |
Kotnik, Bojan
Topics
filter z delci |
indikator moči sprejetega signala |
brezžična senzorksa omrežja |
več anten |
particle filter |
localization |
received signal strength indicator |
multiple antennas
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Library | Call number – location, accession no. ... | Copy status |
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National and University Library, Ljubljana | GS II 715710 glavno skladišče | available - reading room |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Svečko, Janja, 1983- | 30385 |
Gleich, Dušan | 20862 |
Kotnik, Bojan | 21303 |
Source: Personal bibliographies
and: SICRIS
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