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Signal analyzer based on universal USB DVB-T receiver
Hoferek, Jakub ; Vychodil, Josef (referee) ; Derbek, Vojtěch (advisor)
This thesis deals with using a commercially available USB DVB-T tuner for spectrum analysis. In the first part, there are other possible platforms compared to income described hardware specific receiver tuner R820T and AD converter RTL2832. The next part is realized by a spectrum analyzer and a simple FM receiver. These functional units are created on GNU Radio and Matlab.
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Millimeter Wave Band Wireless Channel Measurement Techniques in Automotive Applications
Vychodil, Josef ; Kovář, Pavel (referee) ; Masopust, Jiří (referee) ; Derbek, Vojtěch (advisor)
Tato disertační práce se zabývá metodami měření přenosových kanálů v pásmu milimetrových vln se zaměřením na automobilové aplikace. Po stručném úvodu do problematiky a shrnutí současných metod měření přenosových kanálů jsou vytyčeny cíle práce --- návrh a sestavení měřícího systému, schopného zachytit všechny rysy a detaily rychle se měnícího únikového přenosového kanálu a praktická měření s tímto systémem. Následuje jádro disertace --- představení vyvinutého systému a detailní popis použitých metod, principů, hardwaru i způsob zpracování naměřených dat. Podstatná část práce je věnována eliminaci nechtěných jevů, způsobených nelineárními prvky v systému. Poslední kapitoly obsahují výsledky praktických měření různorodých scénářů --- kanály pro komunikaci uvnitř vozidla, mezi vozidly i mezi vozidly a infrastrukturou.
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Signal of heartbeats – laboratory tool
Vyplel, Vojtěch ; Vychodil, Josef (referee) ; Sigmund, Milan (advisor)
This work deals with the development of a laboratory device for measuring heart rate. The work will describe the basic anatomy of the heart and the origin of heartbeats. There are also methods for measuring heart rate. A sensor for sensing a heart rate in a laboratory device is described in detail. The work presents the circuit solution of the laboratory device and measurement of its functionality. Furthermore, the work describes the application for the evaluation of heart rate and written instructions for laboratory exercises.
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60 GHz Time Domain Channel Sounder
Vychodil, Josef
This paper describes a time domain channel sounder based on pseudorandom binary sequences. The channel sounder system consists of several off-the-shelf laboratory instruments connected together and controlled from PC. Frequency band of interest is the unlicensed millimeter wave band (MMW), 57–64 GHz. The system’s architecture and its parameters are presented and discussed. Crucial feature of the proposed system is fast measurement speed enabling measurements of real scenarios with moving objects.
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RFID signal analyzer using USB DVB-T receiver based SW defined radio
Sládek, Ondřej ; Vychodil, Josef (referee) ; Derbek, Vojtěch (advisor)
This bachelor’s work deals with the development of software analyzer of RFID signals in the UHF band using a USB DVB-T receiver. First part of the work describes RFID systems generally with emphasis on EPC Class-1 Generation-2 standard. The work also analyses possibilities of using a USB DVB-T receiver to receive complex IQ signal and possible options for interfacing it with LabVIEW. The created interface is described as well as the LabVIEW application itself. Furthermore, examples of recorded RFID communication are shown and possible future use of the developed code for a radio-band scanner is demonstrated at the end of the work.
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Probe for RFID cards tests at 13.56 MHz
Zigo, Viktor ; Vychodil, Josef (referee) ; Derbek, Vojtěch (advisor)
This thesis deals with RFID technology and the tag design for RFID device testing on the frequency of 13, 56 MHz. Everything regarding testing of such devices is described in ISO 18047-3 Standard. The target of this thesis is to design and construct the impedance matching (probe) between a proof coil and SW radio USRP N200 and the principles of this probe design are explained.
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HF RFID tag emulator
Neužil, Ondřej ; Derbek, Vojtěch (referee) ; Vychodil, Josef (advisor)
This thesis contains the basic information about the Radio Frequency Identification (RFID) technology. It describes its main principles and usage. The main goal of this thesis is to design a RFID tag emulator for HF band according standard ISO 15693 that should emulate the long-range contactless smart card. The design includes the selection of the suitable components, such as a microprocessor - the core of the whole emulator, or calculation of the efficient integrated coil dimensions on a printed circuit and software for communication between the RFID reader card and the emulator.
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Universal wireless communication link using ZigBee modules
Kyselý, Tomáš ; Vychodil, Josef (referee) ; Prokeš, Aleš (advisor)
The work deals with the transmission of information via wireless ZigBee 802.15.4 standard. It describes the function, method and determination of this technology, the transmission system and security of information between ZigBee devices. It also shows the ability to connect ZigBee module to the computer, configure it for use on the network and comunicating in the network. Finally proposes the simplest diagram and PCB for the application.
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HF RFID tag emulator
Neužil, Ondřej ; Derbek, Vojtěch (referee) ; Vychodil, Josef (advisor)
This thesis contains the basic information about the Radio Frequency Identification (RFID) technology. It describes its main principles and usage. The main goal of this thesis is to design a RFID tag emulator for HF band according standard ISO 15693 that should emulate the long-range contactless smart card. The design includes the selection of the suitable components, such as a microprocessor - the core of the whole emulator, or calculation of the efficient integrated coil dimensions on a printed circuit and software for communication between the RFID reader card and the emulator.
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