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Detection of the RF Signal on MRI
Břínek, Adam ; Kolář, Radim (referee) ; Drastich, Aleš (advisor)
Presented bachelor’s thesis is focused on the detection of MR signal. The aim is to propose the laboratory exercise. The difference between the linear and quadrature detections is described with emphasis on SNR. The program was created in Matlab GUI to be provided in the laboratory excercise. The program is presented in the text.
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Precise frequency generator
Kopečný, Martin ; Horák, Martin (referee) ; Kolka, Zdeněk (advisor)
This bachelor thesis is aimed at design and realization a Precise frequency generator. Generator making use radio service DCF77 as a source of referencial signal for synchnonization. Synchronization with DCF signal warrants to generator high long time precision of output frequency. Generator is used to measurement. This device generate synchronous clock frequency in two places which are independent and remote each other about 1km.
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Detection of radio communication signal in frequency domain
Zátyik, Ján ; Povalač, Karel (referee) ; Maršálek, Roman (advisor)
The purpose of my bachelor’s thesis is to describe different methods of detection of radio communication signal in frequency domain. Describes principle of methods Bartlett, Welch, Multitaper, Yule-Walker and Burg for power spectrum estimation of signal. Compares simulation of methods based on described theory with methods of the software MATLAB. Firstly, performs simulation for noiseless signals OFDM, 8PSK, CDMA and finds out their usability for these signals. Secondly, repeats simulations with the same configuration of methods for noisy signals and finds out their usability for real signals.
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Scintillation SE Detector for Variable Pressure SEM
Tihlaříková, Eva ; Neděla, Vilém (referee) ; Jirák, Josef (advisor)
This project deals with the theme of environmental scanning electron microscopy (EREM). This method allows the examination of insulators and wet specimens without pretreatment and modification like drying and metallization. The principle of this method consists in using higher pressure in a specimen chamber. The pressure is within the range of 100 – 200 Pa. However, the pressure in the specimen chamber restricts the signal detection interference. The objective of the work is to explore the possibility of interference in secondary electron route detection by way of electrostatic field. The electrostatic field was realized with the system consisting of four electrodes located in front of the scintillation detector. It should have interfered the secondary electron´s trajectory to the detector chamber. The optimization of voltage on the electrodes was made by simulation program called SIMION. The simulation results were experimentally verified with laboratory EREM.
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Detection of the RF Signal on MRI
Břínek, Adam ; Kolář, Radim (referee) ; Drastich, Aleš (advisor)
Presented bachelor’s thesis is focused on the detection of MR signal. The aim is to propose the laboratory exercise. The difference between the linear and quadrature detections is described with emphasis on SNR. The program was created in Matlab GUI to be provided in the laboratory excercise. The program is presented in the text.
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Detection of radio communication signal in frequency domain
Zátyik, Ján ; Povalač, Karel (referee) ; Maršálek, Roman (advisor)
The purpose of my bachelor’s thesis is to describe different methods of detection of radio communication signal in frequency domain. Describes principle of methods Bartlett, Welch, Multitaper, Yule-Walker and Burg for power spectrum estimation of signal. Compares simulation of methods based on described theory with methods of the software MATLAB. Firstly, performs simulation for noiseless signals OFDM, 8PSK, CDMA and finds out their usability for these signals. Secondly, repeats simulations with the same configuration of methods for noisy signals and finds out their usability for real signals.
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|
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Precise frequency generator
Kopečný, Martin ; Horák, Martin (referee) ; Kolka, Zdeněk (advisor)
This bachelor thesis is aimed at design and realization a Precise frequency generator. Generator making use radio service DCF77 as a source of referencial signal for synchnonization. Synchronization with DCF signal warrants to generator high long time precision of output frequency. Generator is used to measurement. This device generate synchronous clock frequency in two places which are independent and remote each other about 1km.
|
|
|
Scintillation SE Detector for Variable Pressure SEM
Tihlaříková, Eva ; Neděla, Vilém (referee) ; Jirák, Josef (advisor)
This project deals with the theme of environmental scanning electron microscopy (EREM). This method allows the examination of insulators and wet specimens without pretreatment and modification like drying and metallization. The principle of this method consists in using higher pressure in a specimen chamber. The pressure is within the range of 100 – 200 Pa. However, the pressure in the specimen chamber restricts the signal detection interference. The objective of the work is to explore the possibility of interference in secondary electron route detection by way of electrostatic field. The electrostatic field was realized with the system consisting of four electrodes located in front of the scintillation detector. It should have interfered the secondary electron´s trajectory to the detector chamber. The optimization of voltage on the electrodes was made by simulation program called SIMION. The simulation results were experimentally verified with laboratory EREM.
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