20.500.12556/RUL-185939 Določanje lokacije z uporabo brezžičnih omrežij Location Determination Using Wireless Networks V diplomski nalogi je obravnavano določanje lokacije v zaprtih prostorih z uporabo brezžičnih omrežij. Ker satelitski sistemi v stavbah zaradi slabljenja signala niso dovolj zanesljivi, so predstavljeni glavni pristopi in algoritmi notranjega pozicionira nja ter njihove prednosti in omejitve. Podrobneje sta obravnavani tehnologiji WiFi in Bluetooth Low Energy, skupaj z možnostmi njune uporabe za določanje položaja, predstavljene pa so tudi komercialne rešitve ter vprašanja zasebnosti pri zaznava nju brezžičnih naprav. V praktičnem delu je razvit sistem za določanje lokacije mobilnih telefonov na osnovi metode prstnih odtisov WiFi. Sistem sestavljajo štiri sprejemne postaje Raspberry Pi, ki pasivno zajemajo okvirje WiFi znanih naprav in iz izmerjenih moči signala sestavljajo prstne odtise. Na njihovi podlagi sistem določa prostorsko cono in ocenjuje položaj naprave v prostoru. Opisani so zasnova in programska arhitektura sistema, zbiranje učnih odtisov, učenje modelov, vpliv pogostosti oddajanja telefonov ter izvedba daljšega sledenja treh naprav. Ocenjene lege so uporabljene za prikaz vzorcev zadrževanja posameznih oseb v obliki toplotnih kart. Pri vrednotenju na nevidenih referenčnih točkah je bila točnost klasifikacije con 63,8 %, mediana napake ocenjene pozicije pa 1,51 m. Na koncu so obravnavane omejitve izdelanega sistema in možnosti njegovega nadaljnjega razvoja. This thesis addresses indoor positioning using wireless networks. Since satellite based systems are not sufficiently reliable inside buildings due to signal attenuation, the main approaches and algorithms used for indoor positioning are presented, together with their advantages and limitations. The WiFi and Bluetooth Low Energy technologies are discussed in greater detail, including their use for position estimation, along with commercial solutions and privacy issues related to the detection of wireless devices. In the practical part, a system for determining the location of mobile phones based on WiFi fingerprinting is developed. The system consists of four Raspberry Pi receiver stations that passively capture WiFi frames transmitted by known devices and use the measured signal strengths to construct fingerprints. Based on these fingerprints, the system determines the spatial zone and estimates the position of a device within the room. The system design and software architecture, collection of training fingerprints, model training, the effect of phone transmission frequency, and long-term tracking of three devices are described. The estimated positions are also used to visualize the occupancy patterns of individual users in the form of heatmaps. On unseen reference points, zone classification accuracy was 63.8%, and the median position error was 1.51 m. Finally, the limitations of the developed system and possibilities for its further development are discussed. določanje lokacije brezžična omrežja WiFi mobilni telefoni metoda prstnih odtisov Raspberry Pi moč signala location determination wireless networks WiFi mobile phones fingerprinting Raspberry Pi signal strength true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-08-24 11:40:08 2026-08-24 11:40:22 2026-08-28 07:30:09 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 38729 289186051 Kralj_Niko_-_Dolocanje_lokacije_z_uporabo_brezzicnih_omrezij.pdf Kralj_Niko_-_Dolocanje_lokacije_z_uporabo_brezzicnih_omrezij.pdf 1 5038CF2A8E85C7196736721FE0DF180F 119af1e4c1a16e7eac1e39f4236781b9cb2a653b622f48f64916a27dfb063ef6 6ebff39b-9f9f-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=244957 Fakulteta za računalništvo in informatiko 0 0 0