Ispitivanje komunikacijskih parametara daljinski upravljanih bespilotnih letjelica

master's thesis

• Title (english): Communication parameter testing of remotely controlled unmanned aerial vehicles
• Author: Mato Kovčalija
• Mentor: Krešimir Malarić (mentor)
• Committee member: Krešimir Malarić (predsjednik povjerenstva)
• Committee member: Dina Šimunić (član povjerenstva)
• Committee member: Marin Vuković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2021-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovome radu opisani su dronovi kroz povijest, dana je njihova podjela te moguća primjena raznim područjima i opisane su njihove značajke. Također opisan je bežični prijenos informacija te njegovi dijelovi. Zatim su opisane smetnje odnosno interferencije koje utječu na kvalitetu signala, a samim time i domet bespilotne letjelice. Shodno tome opisane su metode koje se koriste kako bi se otklonile ili smanjile smetnje, kao modulacije multipleksiranje i prošireni spektar. Nadalje, navedene su značajke FHSS i DSS, odnosno metode koje služe za proširivanje spektra. Opisan je i WLAN i Bluetooth, tehnologije koje se koriste na frekvenciji od 2,4 GHz. U praktičnom dijelu rada ispitano je ponašanje drona DJI Mavic Mini drona u raznim uvjetima i ispitani su komunikacijski parametri u pojasu 2,4 GHz te je napravljen proračun veze na toj frekvenciji. A proračun je provjeren mjerenjima u stvarnim uvjetima. Zaključak je da Wireless signali i prepreke imaju velik utjecaj na kvalitetu veze za razliku od Bluetooth signala čiji je utjecaj gotov zanemariv u odnosu na WLAN signale.

Abstract (english)

This esay describes drones trough the history, their types, possible usage in different areas and also describers their preferences. It also describes wireless dana transfer and its parts. Further it desribes interferences which have impact on signal quality and range of dron by itself. After that it describes methods which are used to remove interfereneces or make them lower, those methods are modulation, multiplexing and te use of the extended spectrum. It also describes preferences or methods for spread spectrum like FHSS and DSSS. WLAN and Bluetooth technologies that are used on 2,4 Ghz frequency are described too.
In practical part of esay DJI Mavic Mini drone behavior is tested in different conditions and communication parametars are mesured in 2,4 GHz range , also link budget on that frequency was resolved and checked in real conditions. Where conclusion was that wireless signals and also obstacales have big impact on quality of the connection, different from Bluetooth signals which don't interfere with quality of the signal almost at all in comparasion with wifi signals.

• Keywords: Dron; WLAN; Bluetooth; modulacija; multipleksiranje; prošireni spektar; DSSS; FHSS; interferencije
• Keywords (english): Drone; WLAN; Bluetooth; modulation; multiplex; spread spectrum; DSSS; FHSS; interference
• Language: croatian
• URN:NBN: urn:nbn:hr:168:795094
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 09:13:39