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Model of transmission channel for xDSL systems
Jedlička, Zdeněk ; Číž, Radim (referee) ; Krajsa, Ondřej (advisor)
This bachelor thesis introduces the xDSL systems, shows the distribution of group members to symmetric and asymmetric, and shows the possibility of modeling the transmission channel for xDSL systems. It also gives ways you can get primary and secondary cable parameters and shows the potential of simulation. These parameters are used to calculate the transfer function, embedded input impedance and attenuation using the program, which is an integral part of this work.
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Design and implementation of managed PoE injector
Frkal, Pavel ; Frolka, Jakub (referee) ; Krajsa, Ondřej (advisor)
This study deals with power supply for network devices using existing structured cabling. Various power supplies are analysed including their limitations and also deals with measuring of the consumed energy. The outcome is 24-port passive PoE injector for remote power supply of network equipment. It's suitable namely for remote devices which lacks built-in PoE support as these do not need major modifications (using passive injection). Power options including current measurement may be done via administrative web interface.
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Laboratory development kit for wireless networks
Marák, Jiří ; Caha, Tomáš (referee) ; Krajsa, Ondřej (advisor)
The aim of this work is to design and implement a laboratory development kit for teaching wireless networks based on IEEE 802.15, IEEE 802.15.1, IEEE 802.11 standards and similar technologies. First are described WPAN and WLAN wireless technologies. In the next part, the work deals with the overall concept of the development kit and the subsequent selection of suitable components, and finally the design of its own development kit and the design of the printed circuit board in the program Autodesk Eagle.
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Battery powered wireless measuring system
Musil, Aleš ; Štůsek, Martin (referee) ; Krajsa, Ondřej (advisor)
Master thesis deals with concept and realization of wireless measuring system, powered by battery. The system consists of two main parts. First part, the node, is designed for the lowest possible power consumption. This is achieved mainly by usage of microcontroller from the STM32 family. Gathered information is transfered via RFM69 module. Second part, the gateway, is powered by Linux operating system on Raspberry Pi. Data from the gateway proxy are propagated through MQTT into Home Assistant, which interprets the results.
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Storage media for data archiving
Šicner, Jakub ; Krajsa, Ondřej (referee) ; Lambertová, Petra (advisor)
This dissertation explains the problem of archiving data based on the media used. Different information carriers and their properties are described in relation with their construction and read and write methods. Depending on write method on individual medium, this part is divided into two main areas. Last part deals with architecture of redundant arrays of independent disks and their standard levels. According to principles of the independent disk array activity, the properties as well as advantages and disadvantages of specific level are discussed.
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Head Pose Estimation and Tracking
Pospíšil, Aleš ; Krajsa, Ondřej (referee) ; Přinosil, Jiří (advisor)
Diplomová práce je zaměřena na problematiku detekce a sledování polohy hlavy v obraze jako jednu s možností jak zlepšit možnosti interakce mezi počítačem a člověkem. Hlavním přínosem diplomové práce je využití inovativních hardwarových a softwarových technologií jakými jsou Microsoft Kinect, Point Cloud Library a CImg Library. Na úvod je představeno shrnutí předchozích prací na podobné téma. Následuje charakteristika a popis databáze, která byla vytvořena pro účely diplomové práce. Vyvinutý systém pro detekci a sledování polohy hlavy je založený na akvizici 3D obrazových dat a registračním algoritmu Iterative Closest Point. V závěru diplomové práce je nabídnuto hodnocení vzniklého systému a jsou navrženy možnosti jeho budoucího zlepšení.
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Web application for classroom managment
Bartoňová, Veronika ; Šilhavý, Pavel (referee) ; Krajsa, Ondřej (advisor)
In this bachelor's thesis I deal with design and implementation of web-based interface for remote administration of phones. For the implementation of this project was chosen development environment language PHP and MySQL database system. The result of this project will create a application, which is secure against the instrusion of unauthorized persons, for one particular type of telephone set.
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Audio processing in BeagleBone AI
Bateško, Tomáš ; Krajsa, Ondřej (referee) ; Sysel, Petr (advisor)
This masters thesis deals with Texas Instruments AM5729 processor that combines ARM and DSP core used on BeagleBone AI kit. It describes instalation and configuration of development toolchain and explains concept of heterogenous processor communication. Then uses this knowledge and tools in order to implement application where ARM core running Linux uses DSP core as coprocessor for realtime audio processing.
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