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Original title in Czech: Elektronika a sdělovací technikaFEKTAbbreviation: PK-ESTAcad. year: 2011/2012
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Profile
The doctor study programme provides the specialised university education to the graduates of the previous master study in electronics and communication technologies. The students are educated in various branches of theoretical and applied electronics and communication techniques. The students make deeper their theoretical knowledge of higher mathematics and physics, and they earn also knowledge of applied informatics and computer techniques. They get ability to produce scientific works.
Key learning outcomes
The doctors are able to solve scientific and complex engineering tasks from the area of electronics and communications. Wide fundamentals and deep theoretical basis of the study program bring high adaptability and high qualification of doctors for the most of requirements of their future creative practice in all areas of electronic engineering and communications. The doctors are competent to work as scientists and researchers in many areas of basic research or research and development, as high-specialists in the development, design, construction, and application areas in many institutions, companies, and organisations of the electrical and electronic research, development, and industry as in the areas of communication and data transmission services and systems, inclusively in the special institutions of the state administration. In all of these branches they are able to work also as the leading scientific-, research-, development- or technical-managers.
Occupational profiles of graduates with examples
The doctors are able to solve scientific and complex engineering tasks from the area of electronics and communication. Wide fundamentals and deep theoretical basis of the study program bring high adaptability and high qualification of doctors for the most of requirements of their future creative practice in all areas of electronic engineering and communications. The doctors are competent to work as scientists and researchers in many areas of basic research or research and development, as high-specialists in the development, design, construction, and application areas in many institutions, companies, and organizations of the electrical and electronic research, development, and industry as in the areas of communication and data transmission services and systems, inclusively in the special institutions of the state administration. In all of these branches they are able to work also as the leading scientific-, research-, and development- or technical-managers.
Guarantor
prof. Ing. Aleš Prokeš, Ph.D.
Issued topics of Doctoral Study Program
The aim of the project is in the solutions of amplifiers or multipliers in advanced classes E, F, G and other in the microwave band. These classes allow improving various parameters of standard circuits, such as efficiency, intermodulation level and others, depending on specific application. The change of parameters is done with the use of manipulation of harmonic frequencies of input signal. In the work it will be necessary to simulate those circuits, to realize selected designs and select proper methodology of measurements in the case of designed circuits.
Tutor: Urbanec Tomáš, Ing., Ph.D.
This work is focused on the analysis of high order modulation schemes and their applications in high-data rate mm-wave band radio relays. E.g. at the present time the BPSK modulation schemes are generally used in 75/85 GHz radio relays. The aim of the research is to analyse characteristics of the mm-wave radio channel and to design of proper single-carrier HOM schmes with applications of coded modulations.
Tutor: Šebesta Jiří, doc. Ing., Ph.D.
At present, there are interesting MIO, discrete devices and new materials which allow to find solutions of microwave parts of the ground as well as the space segments on new principles. These are namely antenna feeds with integrated low noise amplifiers, power amplifiers, quadrature frequency converters, local oscillators with low phase noise, frequency filters, frequency synthesizers, modulators and demodulators. A part of the project will be studies of application possibilities, parameters analysis and designs of extensional units of a satellite communication chain.
Tutor: Kasal Miroslav, prof. Ing., CSc.
The bit error rate and availability of free space optics (FSO) systems are essentially affected by an atmospheric transmission channel characterized by the time variable dispersion, turbulence and absorption. Due to multipath propagation of the optical signal through the turbulent atmosphere the inter-symbol interferences occur. They influences can be effectively suppressed by using the advanced technologies based on OFDM. The aim of the project is investigation of the properties of turbulent medium and determination of proper conception of OFDM (optimal modulation of subcarriers in combination with feed forward error correction) resistant to the influence of the transmission channel.
Tutor: Prokeš Aleš, prof. Ing., Ph.D.
This work is focused on finding new principles and optimization of existing circuits used for generation of a reference voltage. The reference voltage generator will be used in automotive applications. Specifics of the automotive applications are wide temperature range (-50 deg C to +200 deg C) and low sensitivity to interfering signals. The desired temperature range requires higher order temperature compensation. Part of this work is a realization of the proposed new voltage reference generator as a test chip and detail measurements of achieved parameters and immunity to disturbances.
Tutor: Horský Pavel, doc. Dr. Ing.
The doctoral theme is focused on analysis of SFN (Single Frequency Network) and MFN (Multi Frequency Network) broadcast networks parameters for digital television and radio according to DVB-T/H/T2 and DAB/DMB standards. With the analysis is essential focus on coverage criteria of useful signal transmitters set and interference influence evaluation on signal coverage. Further analysis deals with time synchronization in networks, guard interval evaluation, according coverage evaluation and network design parameters optimization. The conditions of network design are results of regional conference RRC06. For the analysis is available commercial SW called "SFN Networks" (SW interface only in Czech) or self-created evaluation algorithms for radio signals propagation in terrain profile in limited area. The aim of the work is evaluation of the SFN and MFN networks parameters influence on required coverage and evaluation of the transmitters requirements for the same reason.
Tutor: Kratochvíl Tomáš, prof. Ing., Ph.D.
Proposed project deals with estimation and analysis of glottal pulses in speakers using speech signal. The aim of this project is development and testing of special algorithms for estimation of the waveform of pulses generated by glottis during speaking. The analysis of estimated pulses will be oriented to selected factors useful for medicinal diagnostics. Development of algorithms will be based on robust DSP methods. In addition, some specific databases in realistic conditions will be created.
Tutor: Sigmund Milan, prof. Ing., CSc.
The aim of the project is to develop methods of analysis of transient phenomena on general interconnects of the kind of coupled multiconductor transmission lines by means of FDTD (Finite-Difference Time-Domain) methods. The interconnects can be nonuniform in general, with frequency-dependent parameters as well as under nonzero initial conditions. The solution should take into account not only nonlinear terminating networks but also possible nonlinearity of the interconnect itself. Proposed methods should be more accurate, faster and more generally applicable compared to methods available in a literature. An interested person is supposed to know techniques of programming in Matlab.
Tutor: Brančík Lubomír, prof. Ing., CSc.
The project is focused on investigation of an optimal intensity profile of the transmitted optical beam that is transmitted in both free space and turbulent atmosphere. The design and realization of the laser transmitter working with several beams which form a "top hat" beam as a result is a part of the project. A program elaboration for the optical beams simulation, their addition and their propagation in the turbulent atmosphere will be needed. The experimental verification of mutual interference of the beams forming the resultant transmitting characteristics is requested.
Tutor: Wilfert Otakar, prof. Ing., CSc.
Proposed project deals with fast keyword search in audio documents. The aim of this project is to identify the topic of a talk by means of simple keywords or phrases given by the user. The searching process is analogous to the search in textual files. An efficient detection of spoken keywords embedded in recorded continuous speech is based on pattern recognition approaches.
Car2X communication for exchange of information between cars and infrastructure part of the system operates in presence of high Doppler shift and another effect of high speed movement in radio channel. The goal of the project is to develop Car2X system model (onboard units and infrastructure part units) and propose concept of testbed for measurement and analysis of transmission channel. Simulation results will be proved by developed testbed.
Tutor: Prokopec Jan, Ing., Ph.D.
Mobile devices process signals of many wireless standards. Interferences between standards are caused by parasitic properties of device and it follows degradation of service quality. The goal of the project is to analyze and seek potential sources of interferences between standards, mainly combination frequencies generated on nonlinearities. The parasitic frequencies can be generated not only on communication system devices, such high order harmonics at the base station output, but in receiver side too (interference from nonlinearity of set-top box amplifier).
The project is focused on the study of diffraction phenomena in transmitted optical beams. The Fresnel diffraction of the elliptical Gaussian beam emerging in the optical transmitters will be studied. The diffraction phenomena make difficulties when adjusting the optical wireless link and negatively affect the acquisition-pointing-tracking subsystem of such a link. The goal of the project is to create a methodology for an optimal adjustment of the transmitter elements minimizing the diffraction effect. When searching the suitable model a comparison of both the model based on FFT algorithm and the model based on Bessel function integrating is needed. The theme includes a model of the transmitter involving both the diffraction effects and the lens aberration.
The doctoral theme is focused on signal processing and transmission analysis of digital television in DVB-IPTV networks. DVB-IPTV deals with compressed video and audio and generic data in an MPEG-2 Transport Stream delivered over IP networks - both broadcast and on demand services. This also covers elements which facilitate the connection of an IPTV STB to an IP network, support for Content Downloading and Retransmission as a means of recovering packet errors. The aim of the work is analysis and evaluation of the DVB-IPTV broadcasting parameters on achieved bit-error rate and quality of the transmission and digital TV and data services.
Optimization across network layers is a different concept, compared to the classical model OSI. Thank to feedback, send through the layer boundaries, the actual stated of the transport channel can be compensated and the parameters of the system can be adjusted so that no losses or breakdowns appear. The aim of the project is extending and connecting the existing simulation tools and creating new tools, which will enable adaptation of a system to different channel conditions. The target application is a wireless video transmission system, in which the video source coder is able to adapt to the actual channel conditions while providing the maximum video quality in the point of reception.
This work is focused on research of methods for GNSS signal processing algorithms (including AGPS signals, Galileo, GLONASS) on a universal platform for SDR. The aim of research is to find efficient algorithms for simultaneous signal processing of different GNSS systems in channels with signals for SPS services using a common communication platform for GNSS/ GSM / LTE and for sufficient accuracy position calculation with minimum demands on computing power of SDR.
The work is focused on the research of hardware systems and their optimizations for high order RF demodulators destined for high data rate digital radio communications about several Mb/s above all for mm-wave band radios. The aim of the research is to analyze an effective topologies of SDR coherent demodulators with optimization of their features.
The aim of the project is area of imaging systems, which use the vector network analyzer. The work deals with methods used in 2D up to 4D imaging systems, studies their features, restrictions and methods of their creations. In the practical part it will lead to realization of perspective system in laboratory and study of dealing with measured data will be done to produce the imaging solution. Practical use is directed to ground penetrating radar or microwave tomography.
This project is focused on the research of integrated reconfigurable antennas based on MEMS technology for mobile devices. With expansion of mobile communication and its services, demands on antenna properties of mobile stations grow. The aim of this work is research of novel antenna concepts able to satisfy requirements of future communication systems.
Tutor: Láčík Jaroslav, doc. Ing., Ph.D.
Modern high-speed microwave devices are using advanced modulation techniques with high spectral efficiency. Present values are considered as limits in the practical application, in terms of a compromise between spectral and power efficiency and thus the length of the microwave link. On the other hand, data communication in these networks contains redundant information and reduction can lead to further increase of the transmission capacity of the microwave link with identical conditions and characteristics of communication system. The aim of the project is to study and design of efficient algorithms for lossless compression of redundant information transmitted via high-speed microwave link with respect to the total transmission latency. The FPGA implementation is considered.
Tutor: Fedra Zbyněk, Ing., Ph.D.
Standard of 4th generation mobile communication system LTE Advanced is prepared with emphasis to provide high speed wireless services with maximum bitrate up to 1 Gbps. System will provide several new types of services, such as Device2Device (Relay) communication. The thesis is focused to development of complex simulation link and physical layer model of LTE Advanced standard for downlink and uplink transmission. Developed simulator should include several modes of Device2Device communication and various channel models. Cooperation with TU Vienna is assumed for project solution.
The subject of this project is research of influence of the optical beam coherence and polarization on the quality of signal transmission in conditions of turbulent atmosphere. Atmospheric turbulence produces received power fluctuations and deteriorates the BER of a link. The aim of the project is proposal for measuring of the beam coherence and polarization so that it is possible to investigate the link transmission quality dependence on such parameters. The design and realization of a testing optical transmitter is a part of the project.
As part of the project, it is necessary to explore the possibility of compressing the image signal using the 3D-DCT transform. On the basis of the data obtained, an optimum compression method will be drawn up that would be appropriate to implement in the digital signal processor. The project will result in the verification of the possibility of compressing image signal using the 3D-DCT transform in real time.
Tutor: Hanus Stanislav, prof. Ing., CSc.
This work is focused on development of new software microprocessor with multiple instruction stream. Within the scope of thesis the student will verify, adapt and prove the proposed architecture in typical applications Mainly, the selection process of suitable functional units would be optimized, along with cooperation and effectiveness of all units.
Tutor: Frýza Tomáš, doc. Ing., Ph.D.
Project is focused into the area of circuit synthesis of the strongly nonlinear dynamical systems. This synthesis is based on mathematical description using the set of the differential equations. The nonlinear transfer functions or larger blocks of the final oscillator will be solved by FPGA digital signal processing. The unseparable part of this work is not only experimental verification of the proposed structures but also theoretical study of its properties and differences on the contrary to analog counterparts. The advantage for potential interested person is a basic knowledge of Matlab, Mathcad, Orcad Pspice and Eagle environment.
Tutor: Petržela Jiří, doc. Ing., Ph.D.
A present day high-speed wireless communication systems are based on optical and microwave frequency bands usage. Their reliability and availability are largely affected by atmospheric conditions (rain, snow fall and fog). Due to the difference of the wavelength used, the combination of both the systems offers very reliable communication tool, because more reliable transmission channel can be chosen according to the atmospheric conditions. The aim of the project is investigation and modeling of the transmission channel in view of both the systems, determination of the link availability and transmission capacity of combined link and finding of algorithms for an optimal allocation of data flow. A number of measurements on real communication systems and statistical evaluation of measured data will be included in the project.
This work is focused on video compression domain. Within the scope of thesis the student will analyze modern video compression formats (such as VP8, HEVC), next the categorization of individual tools used in those formats and their effect on the output data stream. The result of thesis should be the optimized model of fundamental blocks of compression chain and examination of its arithmetical complexity on specific hardware platform (such as FPGA or DSP).
The aim of the project is range measurement according to time delay of signals via active transponder on measured object. The work deals with modulation and code sequencies selection, and with suitable ways of measurement handling. Following the measurements from more different stations, it is necessary to do proper synchronization of their measurements to be able to obtain position in the 3D space. The work is aimed at simulations of problematics in Matlab and practical measurements via active satellite transponders.
Upcoming 4th generation standard LTE Advanced is designed to achieve throughput up to 1 Gbps at wireless interface. The carrier aggregation technique is one scenario to gain high throughput values. The carrier aggregation brings channel bandwidth up to 100 MHz in various frequency bands. The goal of the project is to design algorithms for radio resources allocation in multiple frequency bands simultaneously. The algorithms will be based on estimation of time and frequency dispersion and selectivity of radio channel. Results of channel estimation will be passed to optimization process of the radio resources allocation in higher layers of network model.
In terms of project it is necessary study possibilities of perspective LTE system with a view to his physical layer. After creation of physical layer model in MATLAB programme it is necessary to search influence of radio environment (C/N, C/I ratio etc.) on transmission quality (BER) by the simulation. Attention must be concentrated on investigation of coexistence between LTE system and other systems working in same or near frequency bands. The aim of this work is determine recommendation for operation of the system and network, to be quality of transmission was the best.
Reception of spacecraft signals is characterized by very low Eb/N0 ratio. That is mostly concerned with phase shift keying of a carrier or sub-carrier. Reduced bandwidth is applied for AWGN elimination as the spacecraft distance increases. In this connection there is an interesting problem of instrumental phase noise influence. The goal of this project is to find models of real systems and their experimental verification.
Proposed project is oriented to recognition of speakers and their internal states using speech signal analysis. The aim of this project is development and testing of special algorithms for investigation of emotional as well as mental speaker states which negative affect the activity and behaviour of persons such as fatigue, stress, depression, etc. Development of algorithms will be based on robust DSP methods. In addition, some specific databases in realistic conditions will be created.
The project aims to explore efficient methods of reducing ratio of peak to mean power (PAPR) with transmitters that supports multiple communication standards. It is expected focus on methods working with shaping the output signal of modulation, and also their integration in RF transmitter design. Algorithms can be implemented and tested in FPGA.
At present, wireless communication systems solution is mostly based on digital signal processing. Software Defined Radio makes use of universal programmed hardware for near to optimal signal processing. Goal of this project is search and evaluation such algorithms for receiving part of the satellite communication systems ground segment.
Nowadays, the technology of substrate integrated circuits is a promising solution for the design of the centimeter and millimeter-wave applications. This project is focused on the research of the antennas and passive circuits based on the half mode substrate integrated waveguides (HSIW) for the band of millimeter waves. The main attention of the project is concentrated on the original design of radiators and their coupling with the HSIW. Further attention should be focused on passive circuits connected to the antenna.
The project is focused on developing novel numerical techniques for evaluation of inverse Laplace transforms of functions of single and multiple variables, being accurate and fast enough for purposes of computer simulation in electrical engineering. The methods are still sought after on a world-wide scale, not only in the electrical engineering, but also in another fields of science where systems of ordinary or partial linear differential equations are solved. Multidimensional inverse Laplace transforms, in conjunction with Volterra series theory, can also be used for weakly nonlinear systems solution. As a part of the project, searching effective programme algorithms is also required, therefore knowledge of programming is needed at interested persons (Matlab).
This work is focused on research methods for highly accurate measurements of distances and positions of objects using radio (communication) sysytems for centimeter and millimeter waves. The aim of thie research is an analysis of effective methods for application of appropriate deterministic signals or signals generated by communications equipment in the positioning of the object (receivers or transmitters) with accuracy up to tens of centimeters.
A topic of the thesis is focused on research of possibilities of Volterra series theory utilization, in conjunction with a multidimensional Laplace transform and an association variable technique, for purposes of the analysis of nonlinear electronic systems. In the framework of the project the circuits with both lumped and distributed parameters should be taken into account, including issues of analysis of transient phenomena on multiconductor transmission lines. As a part of the project the software implementation of the methods developed is expected, therefore interested persons are supposed to know techniques of programming (Matlab).
Nowadays, the cognitive radio with dynamic spectrum allocation is one of the hot topics in the area. The 802.22 standard is the first one based on cognitive principle. The aims of the dissertation will be to simulate the PHY and MAC layer of cognitive radio wireless network and to analyze security threats resulting from dynamic allocation. The practical experiments on the network with small number of transceivers will be performed.
Tutor: Maršálek Roman, prof. Ing., Ph.D.