Sistemi za komunikacijo z vidno svetlobo

ADLEŠIČ, MATIC (author), Umek, Anton (mentor)

Komunikacija z vidno svetlobo (VLC) je nastajajoče področje v optičnih brezžičnih komunikacijah (OWC), ki uporablja modulirano svetlobo svetila (LED diode) za prenos podatkov. V sedanjih časih komunikacijskih sistemov je najbolj priljubljen radiofrekvenčni pas (RF), predvsem zaradi učinkovitosti in velike razvitosti. Prenosne kapacitete v radijskih komunikacijah je še mogoče povečati le v območju zelo visokih frekvenc. Tam imamo na razpolago širok frekvenčni pas, zaradi omejitev pri razširjanju radijskih valov pa tudi kratek doseg. Zaradi pomanjkljivosti radijskih komunikacij se je raziskovanje osredotočilo na tehnologijo VLC, ki zagotavlja večje prenosne kapacitete in z združevanjem funkcionalnosti svetil s komunikacijami zagotavlja komunikacijo vsepovsod. Diplomsko delo v prvih poglavjih podaja zgodovino razvoja in trenutno stanje tehnologij VLC sistemov. Predstavljene so razlike med različnimi LED svetili in načini sprejema vidne svetlobe, ter opisani VLC modulacijski postopki. Prav tako so opisana področja uporabe VLC s poudarkom komunikacij v notranjih prostorih, predstavljene so tudi nekatere aplikacije, kjer se uporabljajo VLC sistemi. V eksperimentalnem delu v 5. poglavju sem izdelal prenosni sistem z uporabo vidne svetlobe in demonstriral enosmerno komunikacijo med dvema napravama. Zadal sem si tudi, da prenesem, kar se da, največ bitov podatkov v realnem času. Za obdelavo in prikaz komunikacijskega signala sem uporabil grafično programersko orodje LabVIEW ter napravo za generiranje signala NI myRIO-1900. Hotel sem tudi dokazati vpliv naravne in umetne svetlobe na komunikacijski signal.

• Language: Slovenian
• Keywords: komunikacija z vidno svetlobo, radio frekvenčni pas, LabVIEW, Ni myRIO-1900
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2016
• PID: 20.500.12556/RUL-85510
• Publication date in RUL: 15.09.2016

Secondary language

• Language: English
• Title: Visible light communicaton systems

Abstract

Visible light communication (VLC) is an emerging field in optical wireless communication (OWC) which utilizes the superior modulation bandwidth of light emitting diodes (LEDs) to transmit data. In modern day most popular communication system is radio frequency band (RF) mainly due to high efficiency and development. Transmission capacity in the radio communications can still be increased only at very high frequencies. There we have a wide frequency band, due to restrictions on the dissemination of radio waves as well as short range. Due to the deficiencies of radio communications research is focused on the VLC technology that provides greater transmission capacity and functionality by combining lighting with communications provides communications everywhere. Thesis in the first chapter provides a history of the development and current state of technologies VLC systems. It presents the differences between the various LED lighting modes and reception of visible light and described VLC modulation methods. There are also described the scope of the VLC communications with an emphasis in the interior, and presents some applications where using VLC systems. In the experimental part in chapter 5, I developed and demonstrated communication between two devices using visible light communication, which runs one way. I transfered the bit data in real time as quick as possible. For the processing and presentation of the communication signal I use graphical programing program LabVIEW and a device for generating the signal NI myRIO-1900. I also demonstrate how the natural and artificial light affect the communication signal.

• Keywords: visible light communication, radio frequency band, LabVIEW, Ni myRIO-1900