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Original title in Czech: Elektronika a sdělovací technikaFEKTAbbreviation: PP-ESTAcad. year: 2018/2019
Programme: Electrical Engineering and Communication
Length of Study: 4 years
Accredited from: 25.7.2007Accredited until: 31.12.2020
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. Work will focus also on output circuit design to realize necessary harmonic manipulation. 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.
The project is focused on the analysis of single-phase EMI filters. The analysis has to be focused on the uncertain impedance termination of the EMI filters. The termination has a dominant influence on the filter's insertion loss and also on so call "worst-case" performance. The results will be checked by a lot of measurements and also several mathematical analyses. For these analyses will be designed accurate filter's models.
Tutor: Dřínovský Jiří, Ing., Ph.D.
At present, there are new interesting MIO based on GaN, 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.
Third generation of Advanced Television Systems Committee (ATSC 3.0) standard introduces advanced technical solutions (e.g. Layered Division Multiplexing, communication technology MIMO) and very flexible system parameters (e.g. higher order QAM modulation). This dissertation thesis focuses on the exploring and basic analysis of the signal transmission in terrestrial digital television standard ATSC 3.0. A creation of an appropriate simulation model (e.g. in MATLAB), allowing to simulate and analyze the signal transmission (including emulation of multipath transmission and selective fading), is a prerequisite for such exploring. Possible verification of the theoretical (simulation) results by experimental laboratory measurements (e.g. SDR-USRP radio) is also considered. The main aim of this work is to define the influence of the ATSC 3.0 system parameters on the bit error rate (BER) and on the quality of the signal transmission.
Tutor: Polák Ladislav, doc. Ing., Ph.D.
Doctoral thesis is focused on analysis of the modern and future wireless communication systems and their coexistence in a shared transmission channel. During the analysis, the systems like digital television broadcasting (eg. DVB-T/T2, NGH), standards for mobile communications (eg. GSM/UMTS/LTE), wireless communication systems (eg. ZigBee, BT, WLAN, WPAN) etc., have to be taken into account. Prerequisite of the successful solution is definition of the statistical model of the transmission channel with variable parameters and then its verification including simulated coexistence with various wireless services. The aim of the work is not only the model of the transmission channel, but also innovative algorithms of the wireless services separation that are optimized for the verified and shared transmission channel model.
Tutor: Kratochvíl Tomáš, prof. Ing., Ph.D.
The next generation of terrestrial digital video broadcasting standard (DVB-T2) incorporates the option of using multiple-input single-output (MISO) spatial diversity transmission technique. This dissertation thesis focuses on the exploring and analysis of signal transmission in the second generation terrestrial digital television standard (DVB-T2/T2-Lite) uses spatial diversity transmission techniques MISO and in the future MIMO. A prerequisite of such analysis is a creation of an appropriate simulation model, allows simulating and analysing of the signal transmission which consider multipath propagation with selective fading, and adjustable system parameters of the transmitter and receiver system blocks. A possible verification of theoretical (simulation) results by measurement either in a real environment or in laboratory conditions is also considered. The main aim of this work is the definition of the influence of the system parameters on the bit error rate (BER) and on the quality of the signal transmission.
The aim of the project is to elaborate ways of description of nonlinear electronic systems using Volterra series theory and find effective methods of their solution. In theoretical part, existing methods will critically be evaluated and computationally more efficient procedures searched, including multivariate Laplace transform approach and related numerical techniques. Attention will be focused on use in the analysis of systems with distributed parameters with nonlinearities. In experimental part, dependencies between Volterra series kernels and X-parameters measured by nonlinear vector network analyzer are supposed to be exploited. Potential candidates should have an interest in applied mathematics and programming in MATLAB.
Tutor: Brančík Lubomír, prof. Ing., CSc.
The aim of the project is to develop techniques of the analysis of stochastic changes of interconnects parameters in electronic systems on a basis of the theory of stochastic differential equations (SDE). The subject of the research will be devoted partly to the application of ordinary SDEs, useful to describe models with lumped parameters, and partly to the study of the applicability of partial SDEs, useful for continuous models based on the telegraphic equations. It is expected generalization of some proposed techniques towards the analysis of hybrid electronic systems based on stochastic differential-algebraic equations (SDAE). Effectiveness of the proposed methods will be evaluated by comparison with standard statistical approaches such as Monte Carlo method. Potential candidates should have an interest in applied mathematics and programming in MATLAB.
This work deals with synthesis/approximation of network building blocks (integrator, derivator, etc.) of the fractional order circuit by help of chains of subparts employing bilinear transfer sections of the integer order where independent electronic control of the zero and pole location is allowed. This approximation (valid in limited frequency bandwidth) allows to obtain fractional exponent of the Laplace operator s and construction of the so-called “half integrator” (1/s^0.5) for example. The work in this topic is focused to circuit theory but partial results will be verified experimentally with attention to suitable practical applications and applications in smart components of physical layer of communication systems.
Tutor: Šotner Roman, doc. Ing., Ph.D.
This dissertation thesis focuses on the definition and exploring of possible coexistence scenarios between wireless communication services (e.g. LTE/LTE-A, IEEE 802.22, IEEE 802.11af/ah) and digital video broadcasting services (DVB-T/T2/T2-Lite). Such coexistence scenarios can be critical (a partial or full loss of wireless services, provided by communication systems) and non-critical (both communication systems can coexist without significant performance degradation). The aim of this work is to verify the defined coexistence scenarios and their analysis with appropriate simulation models (e.g. in MATLAB). Verification of the theoretical (simulation) results by measurement either in a real environment or in laboratory conditions (e.g. SDR-USRP radio) is also considered. Based on the obtained results, recommendations for a coexistence-free operation of wireless communication systems in shared radio frequency bands will be defined.
The fifth-generation (5G) technology is the next step in the evolution of advanced wireless communication systems, where the wireless equipment can process different wireless services, provided by various communication systems, in shared frequency bands. This dissertation thesis focuses on the definition and exploring of possible coexistence scenarios between 5G mobile systems (e.g. LTE/LTE-A) and wireless systems (IEEE 802.11 n/ac/ax) in shared ISM frequency bands. Such scenarios can be critical (a partial or full loss of wireless services, provided by communication systems) and non-critical (both communication systems can coexist without significant performance degradation). The aim of this work is to verify the defined coexistence scenarios and their analysis with appropriate simulation models (e.g. in MATLAB). Verification of the theoretical (simulation) results by measurement either in a real environment or in laboratory conditions (e.g. SDR-USRP radio) is also considered. Based on the obtained results, recommendations for a coexistence-free operation of wireless communication systems in shared ISM frequency bands will be defined.
Proposed project is oriented to detection of alcohol using signal analysis of phone speech. The aim of this project is development and testing of special algorithms for investigation of alcohol intoxication in low level which is not audible but affect the activity and behaviour of persons. Development of algorithms will be based on robust DSP methods applicable both in real-time analysis and stored signal analysis. In addition, some specific databases under realistic conditions will be created.
Tutor: Sigmund Milan, prof. Ing., CSc.
The work is focused on the study of atmospheric turbulence, which is an important factor affecting the properties of optical radiation. The work consists of detailed analysis of the turbulent media and describes horizontal and vertical models of the atmosphere. The methodology for quantification of the degree of turbulence considering the needs of optical wireless communication is the next point of the work. The main goal of the work is to determine the maximum achievable transmission rate in the optical wireless links. The dependence of the transmission rate on the degree of atmospheric turbulence and on the wavelength of the optical carrier for the various types of optical beams with respect to the used modulation and coding techniques will be examined. The analysis of bit error rate during the operation of optical wireless link in turbulent atmosphere should be a part of the work. The project is in large part experimental.
Tutor: Hudcová Lucie, doc. Ing., Ph.D.
The project is aimed at study of synchronized distributed SDR receivers performance and at their application for satellite communication. The proposed system should allow simultaneous reception and data extraction from multiple signals. The main target of the study is enhancement of error-free data reception probability, exploitation of distributed system gain and stations redundancy. System is determined for data reception from experimental satellites in UHF band.
Research is focused on modeling, simulations and experimental verification of circuit realizations of higher-order harmonic oscillators and inharmonic generators for structures of physical layer of communication systems working in base and inter-frequency band. The main task is to found features and application possibilities of circuits with higher order than 3 and circuits defined by differential equations of fractional order. An attention will be concentrated on frequency tunability, phase and magnitude relations between generated signals and suitable amplitude stabilization especially. Part of the work deals with detailed description of signal generation based on linear and nonlinear mathematical operations that are allowed by implementation of so-called constant phase elements producing constant phase shift between excitation signal and response.
The spatiotemporal behavior of radio-frequency channels can be estimated by various geo-statistical methods. Channel measurements are usually available only at a few positions, e.g., at the positions of certain base stations. Geo-statistical methods can then be used to interpolate between the known data and estimate the channel parameters at desired positions, e.g., at the positions of mobile users. The aim of this Ph.D. thesis is to devise suitable methods for estimating channel parameters, such as RSSI or other channel quality indicators, in the case of moving terminals. We are especially interested in vehicular scenarios where also certain mobile users provide channel quality measurements. The devised methods should be able to exploit the repeated measurements of static base stations and mobile users for a reliable spatial interpolation and temporal prediction of channel quality indicators for other mobile users.
Tutor: Maršálek Roman, prof. Ing., Ph.D.
Steadily growing number of communication devices per area and increasing quality of services require allocation of more frequency resources. Millimeter wave (MMW) frequencies between 30 and 300 GHz have been attracting growing attention as a possible candidate for next-generation broadband cellular networks. Specific limitations of MMW signal propagation, extremely large bandwidth and time variable environment caused by mobile users connected to a backhaul networks traveling in rugged municipal environments create unprecedented challenges to the development of broadband communication systems using advanced technologies for eliminating the undesirable time varying channel features. The aim of the project is measurement and modelling of the broadband non-stationary MMW channels in time and spatial domain (i.e. modelling the environment between mobile users and backhaul) in order to evaluate feasibility of advanced techniques such as beamforming or massive MIMO spatial multiplexing implementation.
Tutor: Prokeš Aleš, prof. Ing., Ph.D.
The aim of the project is area of passive and active circuits, which allow changes to signal transmission in the position of feeding network, for example phasing circuits, tunable filter circuits etc. Proposed structure should be modeled theoretically and verified by realization targeted on perspective bands of centimeter and millimeter waves. Application of the circuits should be targeted to intelligent antenna systems, which will allow reconfigurablility during operation. Project target is mainly in the complex reconfigurability in the multi dimensions.
Deep architectures are composed of multiple levels of non-linear operations (e.g., artificial neural networks with hidden layers). Searching the parameter space of deep architectures is a difficult task, but learning algorithms have been recently proposed to tackle this problem. The project is focused on a detailed study of deep architectures and their learning, on their software implementation using parallel computing, and their applications in field of computational electromagnetics.
Tutor: Raida Zbyněk, prof. Dr. Ing.
The project is focused on research and implementation of methods for symbolic and semi-symbolic analysis of linear or linearized electronic circuits. The aim is to develop new methods for so-called approximate symbolic analysis of large systems based on topological approach that respects physical relations in circuit. The methods have a potential to provide simply interpretable results. It is expected the new methods will be used in the process of integrated circuit design and testing. Part of the project consists in implementing of developed algorithms and their inclusion into the SNAP program.
Tutor: Kolka Zdeněk, prof. Dr. Ing.
The subject of this project is focused on the research of methods and technologies for interfernce suppresion in shared radiofrequency bands based on beamforming using massive antenna arrays including distributed multi-senzor networks. The goal of this work is the investigation of effective algorithms using SIMO and MIMO systems to interference localization (or angle of arrival estimation) in complex radio-evironments (such as in dense urban areas, indoor, etc.). The possible ways are to autonomously modification antenna pattern with minimum in the direction of interference source and maximum in the direction of useful source or usign separation and cancelation of interefence signal from useful signal. The challenging aspects of the research are applications of massive anntena arrays, distributed systems, and solution in digital domain for time-variant radio environment. etc.) Results of this research will be used in the next generation of communication systems and also in modification of present system to ensuring of communication reliability in strong interferences.
Tutor: Šebesta Jiří, doc. Ing., Ph.D.
Ever increasing demand for high-speed communications in mobile networks leads to the use of increasingly higher frequency bands. In the area of millimeter wave band there is a sufficient bandwidth but extremely high path loss. The short wavelengths, however, allow to realize tiny antennas and combine them into arrays offering a large gain, that can the path loss significantly eliminate. The project is aimed at the research and development of algorithms for adaptive beamforming in combination with massive MIMO that would be able to combine optimally both approaches depending on the channel state and user requirements. The project includes study of a possible hardware implementation of the proposed algorithms and methods of antenna arrays control.
The thesis aims at the space-time electromagnetic analysis of antenna systems showing plasmonic properties. The research will focus in particular on the analytic description of pulsed radiation characteristics of selected antenna structures with emphasis on their distortion analysis and pulse shaping capabilities.
Tutor: Štumpf Martin, doc. Ing., Ph.D.
The time-domain analysis of wave field propagation in strongly heterogeneous media is of high practical importance in electromagnetics (with applications to finely layered integrated circuits and their signal integrity and EMC/EMI analysis) as well as in elastodynamics (with applications to oil and natural gas exploration). Accordingly, the present thesis aims at developing efficient computational models for calculating pulsed wave field responses of high-contrast thin-sheet configurations accounting for their relaxation behavior (e.g. plasmonic/meta-material thin layers).
This topic is focused on study of novel principles of electronic control in the frame of internal architecture of an active element. It extends performances of existing active elements such as: current conveyors, transconductors, current and voltage amplifiers, etc. These elements offer only one adjustable parameter in most cases. Main goals are identification of hitherto unpublished possibilities of the control in the frame of one block or simple combination of several basic sub-blocks. Investigation of this active device will be provided by ideal models, behavioral models (emulators) based on commercially available devices and their realization in suitable CMOS technology. Verification of usability of these active elements in suitable standard and smart circuit applications is also supposed.
The aim of the project is a study of actual signals from experimental satellites and its influence on localization. Part of the work will be a study of error sources as atmosperic influence and parameters of SDR receivers. Measurement with multiple of SDR receivers will follow to get experimental data for localization implementation. The research then will be targeted to optimal solutions for high precision, resolution and other parameters of realized system.
The autonomous vehicles will need to cope with unpredictable behavior of other, non-autonomous, objects (pedestrians, conventional vehicles). To maintain the safety requirements, usage of so-called Ultra Reliable Low Latency Communications (URLLC) as a part of 5G communication standards is expected. The focus of the work will be on research of probabilistic models (Gaussian processes, Markov chains, time-frequency point processes etc.) and analysis of their suitability for modeling of communications between autonomous vehicles.
The project is focused on the research of microwave components which can be programmed to achieve required function depending on specific need. The attention should be particularly concentrated on the development of programmable transmission structures based on conventional or artificial materials. Proposed components should find application in the area of future wireless communication systems.
Tutor: Láčík Jaroslav, doc. Ing., Ph.D.
In contrast to what is presently being used in the relevant literature on the subject, the proper physical understanding of the body channel communication mechanism calls for its causality-preserving analytical description in the time domain. Accordingly, the research in the thesis will deal with the analysis of pulsed EM wave field propagation in the close vicinity of (a simplified model of) a human body. The validity of the proposed closed-form propagation models will be demonstrated by means of both numerical and real-life experiments.
Reception of microwave signals coming from the universe is characterized by very low Eb/N0 ratio. That is mostly concerned with phase or frequency shift keying of a carrier or sub-carrier. Reduced bandwidth is applied for AWGN elimination as the signal’s source increases. For this reason very high frequency stability has to be achieved by locking to an atomic frequency standard as well as precise compensation of Doppler shift. Basic requirement is a low value of equivalent system’s noise temperature achievement, related to optimized radiated pattern of the parabolic reflector feed. A part of the project is also methodology of the system sensitivity measurement by means of extraterrestrial noise sources.
The thesis aims at the development of a purely time-domain methodology capable of characterizing the performance of pulse-excited (ultra-wide band) antenna arrays. Namely, the emphasis is placed on the distortion in radiated EM signatures and its characterization by properly defined antenna-system fidelity factors accounting for such systems' beam-shaping and beam-steering capabilities. The thesis will cover (1) analytical and numerical time-domain analyses of generic antenna elements; (2) general description of the pulsed EM-radiation characteristics of an antenna array in dependence on its configurational (e.g. positioning of antenna elements) and excitation parameters (e.g. the pulse shape of feeding electric currents); (3) analytical study into mutual EM space-time coupling between antenna elements; (4) illustrative parameter studies of selected antenna arrays validating the proposed concepts.
This work is focused on study of utilization of special active elements and blocks in the designs of digital modulators and demodulators (for example: frequency hopping, phase shift keying, pulse width modulation, etc.) for structures of physical layer of communication systems working in base-band and inter-frequency band. Design of final applications supposes proposals of own network solutions of electronically controllable oscillators and generators of signals with specific output waveforms. One goal of this work consists in specification of parameters of active elements and blocks required for their utilization in such applications. Theoretical hypotheses will be verified by computer simulations and by experiments with commercially available elements (behavioral emulator), or eventually by simulations and realization of proposed systems in available CMOS technology (AMIS 0.35 um, TSMC 0.18 um).
The prospective research will focus on the imaging potentialities of far-field monostatic pulsed radar returns from a buried unexploded ordnance. A successful completion of the thesis will result in (a) efficient analytical or/and numerical methods for transient EM scattering response calculations; (b) the reliable interpretation of target signatures and in (c) proposing a monostatic radar prototype with its pulse generator and transmitting/receiving antenna system.
Decreasing value of power supply voltage creates limited conditions for electronic tuning of circuits (for example active filters) in comparison to standard current systems operating with high DC power supply. The main task of this work focuses on research and study of methods of electronic control of applications (for example filters and oscillators) working as components of modern communication systems. Suitable combination of features for control of active elements and change of character of dependence (e.g. oscillation frequency vs. adjustable parameter) serve for substantial improvement of tunability range of application. Verification of intended methods supposes PSpice and Cadence IC6 (low voltage technologies AMIS 0.35 um, TSMC 0.18 um) simulations and experiments.
Doktorské téma je zaměřeno do oblasti zpracování/komprese obrazových dat pro vysoké rozlišení nebo multi-view. Náplní práce bude mj. analýza kódovacího řetězce moderního kompresního formátu (např. HEVC, High Efficiency Video Coding), vytvoření modelu tohoto kodéru s cílem odhalit míru komprese obrazových dat, chyby, které do originální sekvence kodér vnáší (snižování kvality) a podíl jednotlivých bloků na celkové energetické náročnosti reálného kodéru. Jedním ze zkoumaných směrů může být např. snaha o optimalizaci dílčího prvku v kódovém schématu, nebo metody pro lepší implementaci bloků na CPU a HW akcelerátory.
Tutor: Frýza Tomáš, doc. Ing., Ph.D.
The subject of this study is an analysis of implementation of universal reconfigurable device, suitable for monitoring of radio transmission in selected parts of radio spectrum. The expected goal is to propose a hardware and software architecture based on the software defined radio principle, that will allow multichannel analysis of signals of various state-of-the-art wireless communication standards (LTE, WiFi, Zigbee) with emphasis on easy adaptability to emerging standards. Developed platform will be further used for experiments with physical layer authentication methods.
The subject of this project is focused on research of methods for precise personal navigation based on data fusing of a few independent sources: GNSS receiver, inertial systems (electronic compass, accelerometer, gyroscope etc.). The goal of this work is investigation of effective fusing algorithms (using extended Kalman filtering, neural networks etc.) for precise pedestrian positioning based on characterization of sensors. Results of this research will be used by rescue workers, worker in dangerous plant, indoor navigation etc.
The object of this research project consists in developing new methods and techniques for free space optical links (FSOL) based on the implementation of fiber elements into the communication terminal. The aim of the project is to analyze atmospheric phenomena and an improvement of reliability of the link working in an atmospheric transmission medium. The possibility of using FSOL to provide new non-standard services within the existing optical network will be investigated.
Tutor: Wilfert Otakar, prof. Ing., CSc.
The project is aimed to investigate potential approaches to measurements of electromagnetic fields on the surface of an animal head, and to develop a solver of an inverse problem to determine equivalent currents inside the head. In order to verify correctness of the solution of the inverse problem, a phantom of the animal head has to be developed enabling us to change currents inside the head deterministically, and to measure electromagnetic phenomena on the surface of the head. The described research is a part of a prepared project to be solved in cooperation with the Center of Mental Health in Prague and Nencki Institute of experimental biology in Warsaw.
One of the ways reducing the cost and consumption of cars, aircrafts, and other vehicles is the replacement of expensive and relatively heavy wiring harness interconnecting tens to hundreds of sensors and actuators with control unit by a wireless network. Multipath propagation of signals in a noisy environment and coordination of communication, however, requires the use of special techniques and signal processing algorithms. The aim of the project is the design and optimization of a multi-hop sensor network. In this project the appropriate modulations, methods of equalization and error correction, etc. on the physical layer and methods of communication resources allocation and coordination of data transfer at higher layers will be investigated.
The project is focused on the investigation of 3D antenna and circuit concepts which can be fabricated by 3D printing technology. At first the attention should be focused on material characterization for 3D printing and then on the development of antennas and their feeding circuits which can be fabricated by 3D printing. Further attention should be concentrated on the fabrication of the designed concepts and investigation of 3D printing technology drawbacks on their performance.