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Design of low-frequency phase locked loop for sensing applications in low-voltage TSMC 0.18 um process
Svoboda, Marek ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
The work deals with the design of FM modulation chains and their sub-circuits, which construction is based on analog multipliers produced in the TSCM process 0.18 m 1.8 V. One chain operate with a rectangular carrier and the other one with a harmonic carrier wave. The basic carrier frequency is 100 kHz, and the basic test modulation signal is 1 kHz harmonic waveform. Demodulators are built on the principle of the phase-locked loop, and the aim of the work is to verify the functionality of such a loop and to determine its limiting properties. The work also contains graphical outputs from the Cadence Virtuoso development package, in which all simulations were performed.
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Experimental Software Synthesizer and Sequencer
Fadieiev, Heorhii ; Indrák, Michal (referee) ; Dlouhý, Dan (advisor)
This bachelor thesis is devoted to an experimental software synthesizer and sequencer. Its main goal is the realization of an experimental electroacoustic musical instrument based on a design created within the semestral thesis. The unique characteristic of this synthesizer is the possibility of assigning to each tone a different waveform from the field of subtractive synthesis, but also amplitude and frequency modulation, as well as the possibility of creating a complicated rhythmic structure. The work is divided into several parts. The first one deals with the collection of theoretical knowledge focused on the topic of sound synthesis, MIDI and software program Max. The second part of the work presents the design of an experimental instrument taking into account the block diagram of the synthesizer, its sequencer and generator. The next part of the work deals with the implementation of the instrument, describes its appearance, GUI, data storage in its memory and analyzes the patch of the synthesizer. The last part describes practical experience and general characteristics of the resulting instrument.
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Breathing Rate Estimation from the ECG and PPG Signals
Blaude, Ondřej ; Němcová, Andrea (referee) ; Kozumplík, Jiří (advisor)
This bachelor’s thesis is focused on breath rate estimation. In this thesis, methods of breath rate estimation from the ECG and PPG signal are described and implemented. In the first two chapters the basics of ECG measurements are described, as well as the measurements of the respiratory system activity and the PPG signal. The third chapter then describes the ECG/PPG-derived respiratory signal estimation methods, later on the breath rate determination. In the fourth chapter, chosen methods are implemented and the created algorithms are applied on real data from the BIDMC database.
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Experimental Hardware Musical Instrument Based on FM Synthesis Controlled by a Contactless Controller
Vejvoda, Zdeněk ; Jirásek, Ondřej (referee) ; Dlouhý, Dan (advisor)
The focus of this bachelor thesis was a design and consequently an assembly of an experimental analog synthesizer. The beginning of the theoretical framework presents the classification of the electroacoustic instruments into subgroups with an emphasis on those which were essential for both the inspiration of the design and for the historical development itself. The subsequent chapter explores the sound synthesis methods and their musical attributes. Afterwards, particular fundamental personae of the history of experimenting with sound and music are mentioned, whose ideas were extracted for the purpose of designing this instrument. The practical part explains the motivation which was present during the work and develops it into a full circuit design. The creative process is supported by explanation of attached diagrams and required calculations. In connclusion, the assembled prototype is presented on a printed circuit board.
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Radar Detection of Vital Signs
Köteleš, Dávid ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
Nowadays, it is very important to measure the vital signs of a person. Thanks to the data that we get from measure, we can control health of the person. It is usefull as well in sports, where we can control performance of sportsman. Different technologies are used for measurement. We can divide these technologies in contact and contactless methods. Contact methods have their disadvantage and that one is when patient can not feel comfortable and then the results may not be correct. Thats why we are currently using contactless methods that we try to develop to achiev highest possible accuracy. In this work are signal processing strategies using fast fourier transform and different filtration techniques for monitoring vital signs described using radar device and eventually their variatons. These strategies are then tested on real data and compared to achiev best result. The IWR1642Boost and Texas Instruments demo software is used for practical exploration.
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Radar Active Cruise Control
Rous, Petr ; Široký, Adam (referee) ; Maršík, Lukáš (advisor)
This bachelor thesis is dedicated to radar active cruise control. The aim of the work is to implement program logic of the adaptive cruise control system. It describes basic techniques of radar signal processing as well as various difficulties during this process. It is also concerned with methods used for radar objects detection. Withing the work, two different radar modules are compared for their suitability to use as sensors of active cruise control. Finally, implemented system is tested using data collected in real road transport.
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Radar Signal Diffusion Simulator
Ormoš, Michal ; Zemčík, Pavel (referee) ; Maršík, Lukáš (advisor)
Aim of this paper as the title suggest is creating radar simulator, which is capable of build up whole process of capturing broadcasting signal. From radar broadcasting, through his simple rebound from object up to capturing the returning signal back to radar. All this in virtual environment.The problem was solved in Matlab programming environment, in a manner of simulation of three dimensional area, which contains arbitrarily moving points. The points represent radar and object on which is radar aiming. Within the environment we are calculating, obtaining and processing all necessary data. From distance, angles to calculations of frequency and power of returning signal.The result of this work is full-valued simulated environment, which demonstrate whole process of capturing moving object by radar to display it in spectogram, which contains information about object passing the radar. Output is raw signal responded to Doppler shift, emerging in simulated environment. Simulator serve for creating the early concept.
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Radar Signal Processing for Radio Altimeter
Krasňanský, Milan ; Maršík, Lukáš (referee) ; Zemčík, Pavel (advisor)
Táto diplomová práca sa zaoberá návrhom a implementáciou algoritmu pre spracovaniu signálu z radaru využívajúceho frekvenčne modulovanú kontinuálnu vlnu. Cieľom je implementácia algoritmu, ktorý by bol dostatočne rýchly (výpočet v reálnom čase na cieľovej platforme) a dostatočne presný pre použitie v rádiovýškomere v ľahkom lietadle so zameraním na použitie počas pristávacieho manévru. Hlavnou metódou spracovania signálu, použitou v implementácii, je Diskrétna Fourierova transformácia. Vytvorený algoritmus bol otestovaný na reálnych letových dátach a pre pristávací manéver dosiahol uspokojivé výsledky.
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Range Measurement Using Radar
Urbánek, Radomír ; Musil, Martin (referee) ; Maršík, Lukáš (advisor)
The aim of this bachelor's thesis is to design and implement method using radar to distance measurement. The first part describes radar principles. A brief introduction radar signal processing methods and radar techniques for distance measurement as well. The next part describes concept and implementation of system for estimate distance. In the end, the implemented method is evaluated and possible continuation is stated.
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Narrowband PLC modem
Novák, Pavel ; Koton, Jaroslav (referee) ; Mlýnek, Petr (advisor)
The theses is focused on the use of PLC technology. The aim of the thesis is creating device which communicates in a narrowband transmission frequency band. Transmission of communication between plc elements runs through the low voltage distribution network. The frequency and phase modulations are used in order to change the character of data signal. Transmitter and receiver parameters are subjects to the CENELEC standard. The theses gives more attention to the area of hardware build communication element rather than the area of programming.
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