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Digital predistorters for amplifier linearization
Kroužil, Miroslav ; Valenta, Václav (referee) ; Maršálek, Roman (advisor)
In this work I describe digital predistortion in baseband used for amplifier linearization. Non-linearity is one of the worst disadvantages of Power amplifiers and decreasing of its is useful from many reasons. Work examines system which contains: Data source, which is represented by QPSK or OFDM modulator, predistorter, Power amplifier (model of non-linearity) and unit used to update coeficients for predistorter adaptation. System is simulated in MATLAB and Xilinx (simulation by ModelSim). Results are compared, described and commented.
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Design of sound reinforcement system
Košarišťan, Miroslav ; Hruboš, Zdeněk (referee) ; Brančík, Lubomír (advisor)
This Master´s thesis deals with sound apparatus. The first part is a theoretical explanation of the main part of the equipment, such as microphones, amplifiers, proofreaders, switches and speakers. Another section is devoted to the design itself, starting with the block diagram which is followed by the design of single important parts. These are made as PCB. For select-ed diagrams there is an example of PSpice program simulations and the measurement of important characteristics. The essential part of the work also addresses constructional pro-cessing of apparatus. At the end of this thesis some examples of the PCB are introduced.
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Design of sound reinforcement system
Košarišťan, Miroslav ; Hruboš, Zdeněk (referee) ; Brančík, Lubomír (advisor)
This Master´s thesis deals with sound apparatus. The first part is a theoretical explanation of the main part of the equipment, such as microphones, amplifiers, proofreaders, switches and speakers. Another section is devoted to the design itself, starting with the block diagram which is followed by the design of single important parts. These are made as PCB. For select-ed diagrams there is an example of PSpice program simulations and the measurement of important characteristics. The essential part of the work also addresses constructional pro-cessing of apparatus. At the end of this thesis some examples of the PCB are introduced.
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Digital predistorters for amplifier linearization
Kroužil, Miroslav ; Valenta, Václav (referee) ; Maršálek, Roman (advisor)
In this work I describe digital predistortion in baseband used for amplifier linearization. Non-linearity is one of the worst disadvantages of Power amplifiers and decreasing of its is useful from many reasons. Work examines system which contains: Data source, which is represented by QPSK or OFDM modulator, predistorter, Power amplifier (model of non-linearity) and unit used to update coeficients for predistorter adaptation. System is simulated in MATLAB and Xilinx (simulation by ModelSim). Results are compared, described and commented.
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Wideband current convertor for Fourier transform interferometer
Zelinka, Jiří
The reserach report describes low current - voltage wide band converter. The report includes details about the construction of the instrument, describes its function, methods and questions concerning its design. The converter processes the current signal of photodetectors used with the Fourier transformed - photoluminescence interferometer.
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