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Digital Signal Processor for Handheld RFID Reader
Benetka, Miroslav ; Zamazal, Michal (referee) ; Šebesta, Jiří (advisor)
This diploma thesis deals with design and realization of a module for a digital signal procesor, for handheld RFID reader working in UHF band. It utilises a special chip EM4298 for RFID signals processing. Module is controlled by the microcontroller ATmega32L, which communicates with the PC through USB bus. Settings in EM4298 is made by a service program which processes received identifying data obtained from tags. Source codes for microcontroller are created in AVR Studio 4.13 program. Source codes for microcontroller are created in C++ Builder 6.0 program. Further thing is Desing and realization of analog interface and a UHF transceiver for wireless communication with tags. A Webench program was used for the analog interface design, which is freely available on the internet. For verification of parameters of the analog interface it was used PSpice 10.0 program. The UHF transceiver is build-up with a MAX2903 chip (transmitter) and AD8347 (receiver) and transmitting and receiving antennae.
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HW interface of database server
Janů, Petr ; Zamazal, Michal (referee) ; Fuchs, Michal (advisor)
The aim of master's thesis is implementation of hardware interface database server. Interface will be collecting data at installation place. Interface will be connected to a remote MySQL server using an Ethernet network and saving data received by serial line in a database.
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Design and implementation of educational CubeSat
Košút, Martin ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This thesis describes the design of a CubeSat with a 1U (10x10x10 cm) size, which will be used in laboratory tasks. It includes mechanical construction printed on a 3D printer with six photovoltaic cells, mounted on the top. Cells will produce electricity to power all systems and to charge the onboard NiMH batteries to make the CubeSat independent of other sources of energy. The proposed design of an electrical power supply system and an onboard computer combined with a communication system is based on off the shelf components. The two-way wireless communication link between computer and a CubeSat is realized thanks to the ground station, which is also part of a design. Students will make other systems, which will communicate with the built in onboard computer via internal RS 485 communication bus. Internal EEPROM memory is used to save measured values. Modularity, possible future expandability, and easy repair in case of any failure were the key optimization parameters of the design.
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SDR-based UHF RFID communication analyzer
Vychodil, Josef ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Main topic of this thesis is development of software for capture and analysis of RFID communication in UHF band (standard EPC Class-1 Generation-2). One part of the work is focused on the basics of the RFID systems, software defined radio concept and graphical programming language LabVIEW. Main part of this thesis is discussing the developed software itself, its methods and principles. Next part is dedicated to present the graphical user interface of created application and its functionality. Last part of this thesis contains examples of captured and analysed processes in UHF RFID communication.
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Signal Processing for UHF RFID Reader
Novotný, Jan ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
The master’s thesis is focused on the UHF RFID reader EXIN-1 signal processing. The first part describes the concept of the EXIN-1 front end, its basic testing and possible communication interfaces for reader control and for receiving and transmitting baseband signals. The second part of this work is aimed to a simple description of EPCglobal Class-1 Generation-2 UHF RFID Protocol, especially to used modulations and codings. In the last part, a block connection between the front end and an ARM Cortex-M4 microcontroller discovery board is designed. The microcontroller is used for generating of all required signals and also for receiving incoming signals and processing them for identification numbers of RFID cards (tags), which are in the reading range of the reader. A decoding algorithm is designed in MATLAB software and implemented to the selected microcontroller. Obtained identification data are displayed on an LCD display and also sent to a PC through a serial communication.
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WiFi and BT monitoring tool
Zelený, Miroslav ; Zamazal, Michal (referee) ; Valach, Soběslav (advisor)
This bachelor thesis deals with possibilities and ways of detection of devices using Bluetooth or Wi-Fi technology, with the possibility of future use for monitoring of human movement. Detection is only in the 2.4 GHz band. It introduces Wi-Fi and Bluetooth technology and their detection. Device detection was performed using Kismet software and Raspberry Pi platform.
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UHF RFID tag emulator
Janošík, Tomáš ; Zamazal, Michal (referee) ; Vychodil, Josef (advisor)
This thesis deals with the design of external backscatter modulator for RFID tag emulator, which is used in UHF band. This modulator is connected with the Universal Software Radio Peripheral and antenna. Realization of a backscatter modulation contains switching between a matched load and an unmatched load. Impedance of the unmatched load is continuously adjustable. Result of this thesis is function prototype.
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Low Noise Amplifiers for frequency range 1-3 GHz
Klegová, Hana ; Zamazal, Michal (referee) ; Kasal, Miroslav (advisor)
This masters thesis deals with low noise amplifier design for frequency range 1 GHz - 3 GHz. There is a short theoretical introduction in the first part of the thesis. There are described parameters and properties of transistors and general two-ports. Description of the noise characteristics two-ports follows. The next capture contains design of two-stage amplifiers. One of them is with a microstrip filter between stages and the second one is with combline filter on input of the amplifier. The amplifiers and the microstrip filter were designed in program ANSOFT Designer. The design of combline filter was realised in program CST Microwave Studio. Both amplifiers ware made and their properties ware compared with simulations.
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RFID Reader for 13.56 MHz Band
Obšitník, Michal ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Cieľom tejto práce je navrhnúť RFID čítačku pre pásmo 13.56 MHz a zostaviť k nej riadiaci program. V prvej časti je najskôr práca smerovaná k oboznámeniu sa s princípom fungovania technológií RFID a NFC, spolu s tým súvisiacimi medzinárodnými štandardami a k oboznámeniu sa s rôznymi dostupnými čipmi na obsluhu týchto technológií. Keďže čip s ktorým sa bude pokračovať je jasne zadaný v návode, ich porovnanie slúži čisto oboznamovaciemu účelu. V praktickej časti je úloha navrhnúť a oživiť prototyp RFID čítačky. Základom je doska sprostredkúvajúca RFID komunikáciu, audiovizuálnu odozvu a pripojenie k OLED displeju. Táto doska je pripojená na mikrokontrolér na ktorý riadi celé ovládanie zariadenia. Súčasťou projektu je aj set rôznych antén, ktoré je možné na dosku pripojiť a zároveň ich vymieňať. Vyrobené antény sú podrobené testovaniu ako dve rozdielne metódy ladenia ovplyvnia ich chod. Testujú sa maximálna vzdialenosť čítania, úspech prevedených čítaní a hodnota prúdu, ktorá sa vznesie pri kalibračnom procese. Výstupom práce je RFID čítač s riadiacim programom.
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Global Positioning System Signal Emulator
Hofman, Jan ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Thesis is adressed to the principals of a satellite navigation. It is focused on a determination of a longitude, latitude and altitude of a single point on the surface of the Earth. It contains analysis of navigation messages and a manner of processing of navigation signals in GPS receivers. Realization of an emulator of the navigation signal of GPS system in Matlab is also described. The purpose of this emulator is a generation of navigation messages, which could be transmitted by universal software radio. The last part of thesis contains the analysis of these signals, which were captured by second software radio.
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