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Measurement of optical and opto-electrical components parameters
Horňáková, Veronika ; Dejdar, Petr (referee) ; Münster, Petr (advisor)
This diploma thesis deals with optical and optoelectronic components. The first part describes three selected optical and three optoelectronic components. Optical components include power divider, isolator and circulator. The optoelectronic ones are laser diode, photodetector and modulator. Basic measurement parameters were defined for each component. In the experimental part, four components from different manufacturers were measured. Selected components are power dividers, isolators, circulators and a laser diode. Subsequently, the measured parameters were compared with the catalog values.
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Demonstration set for basic keying techniques
Žlebek, Lukáš ; Šilhavý, Pavel (referee) ; Číž, Radim (advisor)
This thesis concerns itself with construction of a set of laboratory products, used for demonstrating the basic methods of digital modulation. The primary product, is a generator of carrier and keying signals, which generates cyclically repeated data, and a carrier signal. Another two products are ASK and BPSK modulators. The theoretical part of this thesis describes a basic summary of different kinds of modulation and the design of all the product prototypes themselves. The practical part proves the functionality of individual components of the generator and the functionality of the modulators. In the last part of this thesis, there is a proposal of the laboratory task and its sample solution.
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Modulated signal generator
Melša, Ondřej ; Poměnka, Petr (referee) ; Maršálek, Roman (advisor)
This project occupies with the creation modulated signal generator in MATLAB. There are explicit basic princips of modulation PSK, M-QAM, princip of system with spread spektrum and princip of access OFDM and MC-CDMA. Next there are explicit basic parametres and possibilities configuration of conversion analog PCI card CompuGen 4302, which serves as D/A convertor of signals created by PC.
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Measurement of basic parameters of optical and optoelectronic components
Beneš, Pavel ; Látal, Michal (referee) ; Münster, Petr (advisor)
This diploma thesis deals with optical and optoelecronic components. The first part of the work describes the optical paths and methods of their measurement. The second part describes the coupler, circulator and isolator. Further described is a laser diode, a photodetector and a modulator. The third part describes the measurement procedure of the coupler, circulator, isolator, laser diode, photodetector and modulator. The measured values are compared with the catalog values.
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Cooperation of telecommunication and information transmission systems
Novák, Daniel ; Vychodil, Petr (referee) ; Škorpil, Vladislav (advisor)
Some telecommunication systems are theoretically analyzed in this thesis. Basic types of digital modulations are also analyzed here and applying them to practice. In the implementation part of the thesis are realized three laboratory tasks addressing to modulations issue, coding and data transfer in the SONET network. Tasks are simulated by EMONA TutorTIMS. software. In appendix are described functions and parameters of used modules.
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Spread-spectrum Communication System
Machala, Pavel ; Šimek, Milan (referee) ; Číž, Radim (advisor)
The thesis focuses on issues around communication system with the Direct Spread Spectrum Signal Signal. This work outlines the theoretical analysis of this technique and subsequently is created a communication system concept. The device concept is adjusted so that the device can be used as a laboratory device, presenting the spreading technique. This thesis offers a comprehensive and detailed description of the communication system construction, including design of transmitter, receiver and a common transmission channel. In conclusion are stated the results of devised communication system.
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Design of a Sigma Delta AD converter for sensor applications
Pěček, Lukáš ; Prokop, Roman (referee) ; Kledrowetz, Vilém (advisor)
This diploma thesis deals with the design of a sigma delta AD converter for a sensor application of junction temperature measurement in the automotive environment. A modified continuous time current mode modulator structure was designed. Its advantage lies in shifting and extending an input voltage range to work with signals from 0 V to 1,2 with a high impedance input and a relatively low hardware complexity. The functionality was verified by a behavioral model in the Simulink environment and then by transistor level simulation in CADENCE environment using ONC18/I4T technology.
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Class D audio amplifier for active loudspeakers
Cupák, Jan ; Punčochář, Josef (referee) ; Kratochvíl, Tomáš (advisor)
This master's thesis deals with design of D class audio final amplifier, which was output power 400 W for 4 ? load impedance. Designed audio amplifier is specifical for active speaker, which consists of satelite speakers and subwoofer. Further more it deals also with other functional blocks, e.g. balanced input preamplifier, active crossover and protection for safety running. Outcome of this work are schemes of each functional blocks of D class audio amplifier, whose functionality was verified by simulation. Thesis also contains full reference material including mechanical arrangement of functional blocks on printed connection board. The conclusion contains the measured parameters of function blocks of produced prototype and complete photographic documentation.
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Modulator and demodulator for microwave link
Martinec, Matěj ; Frydrych, Jiří (referee) ; Záplata, Filip (advisor)
This work is dealing with the design of intermediate part of transmitter and reciever that use digital BPSK and QPSK modulations for microwave link that works in 24 – 26 GHz bands. Besides choosing the suitable modulator and demodulator there was need to provide proper connection of this part with transceiver Nortel CTR26-01M. Input and output of this intermediate part was take out to baseband, where was need to ensure the transfer of diferential inputs of modulator and demodulator to symetric leading for reason of data communication with PC, for which was created the algorithms to provide transmitting and receiving data. Complete structure controlled by the microcontroller has been enliven and furthemore there was created the measurement of chosen parameteres.
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Equalization of the transmission channel
Žlebek, Lukáš ; Šilhavý, Pavel (referee) ; Číž, Radim (advisor)
This thesis describes a design of a simulation of transmission of digital information via communication system and equalization of communication function. The layout of communication channel with multiway transmission is described in following part. Next part is about hardware modulator which generate modulated signal which is transmitted via communication channel and after is sampled by A/D convertion card to computer, where is equalizated and demodulated in Simulink. In the last part of this thesis, there is proposal of the laboratory task and its sample solution.
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