Leader: doc. Ing. Jaroslav LÁČÍK Ph.D.

Group website: https://www.urel.fekt.vut.cz/en/applied-electromagnetism-research-group

The main focus of the group is on modelling of electromagnetic problems from low frequencies to sub-THz frequency bands with the particular attention on:

• Development of techniques for modelling of electromagnetic problems.
• Research and development of antennas and microwave circuits.
• Artificial electromagnetic materials and retroreflective lenses.
• Multi-objective stochastic optimisation of metamaterials, metasurfaces and microwave imaging.
• Compiling techniques for the identification of source currents in animal brains.
• Development of digital and physical phantoms of living tissues.
• Measurement of antennas and electromagnetic properties of materials.

The group cooperates with national and international companies mainly in the field of electromagnetic problem modelling, antenna development and measurement, and measurement of electromagnetic properties of materials.

Projects:

• EEG/ECoG based functional connectivity neuroimaging in the rat - optimisation, standardisation and translational leap in neuropsychopharmacology, Czech Science Foundation – Lead agency project, registration number 23-07578K, 2023-2026.
• Textile electronics for home care and professional use, Czech Ministry of Industry and Trade, registration number FV40385, 2019-2022.

Outputs:

• KADERA, P., et al., Alumina 3D Printed Wide-Angle Partial Maxwell Fish-Eye Lens Antenna, IEEE Antennas and Wireless Propagation Letters, 2024 (Early Access) doi: 10.1109/LAWP.2024.3378754.
• ZECHMEISTER, J.; LACIK, J.; KADLEC, P. The Design of Pixelated SIW Horn Antennas With Nearly Equal Beamwidths Using Binary Ink Stamp Optimization. IEEE Access, 2021, vol. 9, no. 1, p. 122216-122227. ISSN: 2169-3536.
• LACIK, J., et al., Rat Head Phantom for Testing of Electroencephalogram Source Localization Techniques. IEEE Access, 2020, vol. 8, no. 1, p. 106735-106745. ISSN: 2169-3536.

Leader: prof. Ing. Tomáš KRATOCHVÍL Ph.D.

Group website: https://www.urel.fekt.vut.cz/en/wireless-coexistence-research-group

Within the coexistence of transmission, mobile, and general wireless services in shared or near frequency bands, we investigate the following problems, processes, and aspects: theoretical and experimental methodology of coexistence inside and outside actual systems; interaction of systems and subsystems of communication devices; and frequency planning or modeling of critical and uncritical coexistence scenarios. Our aims are definitions and measurements of the coexistence scenarios between wireless systems, creation of datasets for training and validation of ML and DL architectures for RF signal classification and improvement of performance of the coexisting systems. Research team is working with digital television systems in UHF / VHF TV bands, wireless communication systems and services in ISM and 2,4 GHz bands and also with 4G / 5G networks towards millimeter wave bands. We were active in the COST Action CA15104 „Inclusive Radio Communication Networks for 5G and beyond (IRACON)“and currently we are part of the COST Action CA 20120 "Intelligence-Enabling Radio Communications for Seamless Inclusive Interactions (INTERACT)". In both we have integrated national research into the international frame and cooperation with foreign institutions.

Projects:

• 2018 - 2020, COST LTC18021, Link: https://www.vut.cz/en/rad/projects/detail/29308
• 2020 - 2023, FEKT-S-20-6325, Link: https://www.vut.cz/en/rad/projects/detail/31881
• 2023 - 2026, FEKT-S-23-8191, LInk: https://www.vut.cz/en/rad/projects/detail/35200

Outputs:

• 2024 - Measurement and Analysis of 4G/5G Mobile Signal Coverage in a Heavy Industry Environment. SENSORS, 2024, vol. 24, no. 8, pp. 1-18. ISSN: 1424-8220.
• 2022 - On the RSSI-based Indoor Localization employing LoRa in the 2.4 GHz ISM Band. Radioengineering, 2022, vol. 31, no. 1, pp. 135-143. ISSN: 1805-9600.
• 2022 - BER and throughput performances of IEEE 802.11ay SC-PHY over measured 60 GHz indoor channels. Telecommunication Systems, 2022, vol. 80, no. 4, pp. 573-587. ISSN: 1572-9451.
• 2021 - Received Signal Strength Fingerprinting-Based Indoor Location Estimation Employing Machine Learning. SENSORS, 2021, vol. 21, no. 13, pp. 1-25. ISSN: 1424-8220.
• 2020 - Performance analysis of LoRa in the 2.4 GHz ISM band: coexistence issues with Wi-Fi. Telecommunication Systems, 2020, vol. 74, no. 3, pp. 299-309. ISSN: 1572-9451.

Leader: Prof. Josef Diblík

The experts affiliated to our group investigate the qualitative properties of solutions of discrete and continuous dynamical systems. In particular, they focus on applicable numerical approaches and the issues of stability, controllability, identification of integer and fractional order systems as well as on the analysis of some classes of nonlinear partial differential equations that arise in mathematical physics and various types of engineering. Outputs of the group have form of research papers.

Most important publications (for the last 4 years)

• LIU, Z.; RADULESCU, V.; ZHANG, J. A planar Schrodinger-Newton system with Trudinger-Moser critical growth. CALCULUS OF VARIATIONS AND PARTIAL DIFFERENTIAL EQUATIONS, 2023, Vol. 62, No. 4, 1-31. (AIS Q1, D1), DOI: https://doi.org/10.1007/s00526-023-02463-0
• DIBLÍK, J.; KHUSAINOV, D.; SHATYRKO, A.; BAŠTINEC, J.; SVOBODA, Z. Absolute Stability of Neutral Systems with Lurie Type Nonlinearity. Advances in Nonlinear Analysis, 2022, Vol. 11, No. 1, 726-740. (AIS Q1, D1), DOI: https://doi.org/10.1515/anona-2021-0216
• BEREZANSKY, L.; DIBLÍK, J.; SVOBODA, Z.; ŠMARDA, Z. Simple tests for uniform exponential stability of a linear delayed vector differential equation. IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 2022, Vol. 8, No. 3, 1537-1542. (AIS Q1, D1), DOI: https://doi.org/10.1109/TAC.2021.3069901
• DIBLÍK, J. Bounded solutions to systems of fractional discrete equations. Advances in Nonlinear Analysis, 2022, Vol. 11, No. 1, 1614-1630. (AIS Q1, D1), DOI: https://doi.org/10.1515/anona-2022-0260
• BRAVERMAN, E.; DIBLÍK, J.; RODKINA, A.; ŠMARDA, Z. Stabilization of cycles for difference equations with a noisy PF control. AUTOMATICA, 2020, Vol. 115, No. 1, 1-8. (AIS Q1, D1), DOI: https://doi.org/10.1016/j.automatica.2020.108862

Group website: https://www.utko.fekt.vut.cz/en/hardware-development-analysis-and-testing

We are engaged in research and design of advanced functional blocks of integer and fractional order for processing mainly analog and mixed signals. Part of our activities is also non-destructive testing and diagnostics of developed hardware, evaluation of reliability of electronic systems, EMC, climatic resistance (temperature, humidity).

Main research activities

• Design of function blocks for pre- and post-processing of analog and mixed signals
• Research and development of methods for the design of advanced electronic systems
• Experimental development of hardware samples and prototypes
• Non-destructive testing and diagnostics, reliability analysis of electronic systems, EMC, climate resistance
• Embedded and digital systems - design, development, testing

Main research results

• MAHATA, S.; HERENCSÁR, N.; ALAGOZ, B. B.; YEROGLU, C. Optimal F-domain stabilization technique for reduction of commensurate fractional-order SISO systems. Fractional Calculus and Applied Analysis, 2022, vol. 25, no. 2, p. 803-821. ISSN: 1311-0454. (https://link.springer.com/article/10.1007/s13540-022-00014-6)
• MAHATA, S.; HERENCSÁR, N.; KUBÁNEK, D.; GÖKNAR, I. C. Optimized fractional-order Butterworth filter design in complex F-plane. Fractional Calculus and Applied Analysis, 2022, vol. 25, no. 5, p. 1-17. ISSN: 1311-0454. (https://link.springer.com/article/10.1007/s13540-022-00081-9)
• LANGHAMMER, L.; ŠOTNER, R. Reconnection-Less Reconfigurable Filter Based on Method of Unknown Nodal Voltages Using 4x4 Matrix. IEEE Access, 2023, vol. 11, no. 1, p. 8600-8608. ISSN: 2169-3536. (https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=10024952)
• TUFENKCI, S.; ALAGOZ, B. B.; KAVURAN, G.; YEROGLU, C.; HERENCSÁR, N.; MAHATA, S. A theoretical demonstration for reinforcement learning of PI control dynamics for optimal speed control of DC motors by using Twin Delay Deep Deterministic Policy Gradient Algorithm. EXPERT SYSTEMS WITH APPLICATIONS, 2023, vol. 213,Part C, no. March 2023, p. 1-16. ISSN: 0957-4174. (https://www.sciencedirect.com/science/article/pii/S0957417422022102)
• MAHATA, S.; HERENCSÁR, N.; MAIONE, G. Optimal approximation of analog PID controllers of complex fractional-order. Fractional Calculus and Applied Analysis, 2023, vol. 26, no. 4, p. 1566-1593. ISSN: 1311-0454. (https://link.springer.com/article/10.1007/s13540-023-00168-x)
• FUJDIAK, R.; MAŠEK, P.; HANÁK, P.; ŠTŮSEK, M.; KRAJSA, O.; POKORNÝ, J.; MLÝNEK, P.; MIŠUREC, J.: G-KS-2018-1; NB-IoT sensor prototype for checking the cathodic protection of the pipeline at control points (https://www.vut.cz/en/rad/results/detail/150858#vysledek-150858)
• MLÝNEK, P.; MAŠEK, P.; MIŠUREC, J.; KRAJSA, O.; ŠTŮSEK, M.: LPWAN tower. (https://www.vut.cz/en/rad/results/detail/181423#vysledek-181423)

Group website: https://www.utko.fekt.vut.cz/en/high-speed-data-networks

We research transmission technologies and communication protocols for high-speed data networks, including modern wireless technologies operating in both the licensed (5G+) and unlicensed (IEEE 802.11, LPWAN) frequency band, as well as optical and metallic networks. Our key activities include design, development and testing of communication systems, analysis of traffic and transmission parameters, design, simulation and measurement of data networks with a focus on ultra-high frequency communications (mmWave), modern mobile applications such as augmented reality, virtual reality, mechanisms of dynamic spectrum management, use of drones as autonomous flying base stations and modern electronic weareability - wearables.

Main research activities

• 5G + mobile systems (communication technologies in licensed and unlicensed frequency spectrum, communication on ultra-high frequencies - mmWave, modern mobile applications such as augmented reality, virtual reality, dynamic spectrum management mechanisms, use of drones as autonomous flying base stations, modern electronic wearability - wearables)
• Wireless communication technologies LPWA and 802.11
• Optical and metallic networks (design, development and testing of optical systems, penetration tests of optical fiber networks, analysis of traffic and transmission parameters, spectrum sharing analysis, design, simulation and measurement of networks)

Main research results

• BARCÍK, P.; MÜNSTER, P. Measurement of slow and fast polarization transients on a fiber-optic testbed. OPTICS EXPRESS, 2020, vol. 28, no. 10, p. 15250-15257. ISSN: 1094-4087. (https://dspace.vut.cz/items/9b1986ab-7617-4291-8f34-c8f2b68537fa)
• SAAFI, S.; VIKHROVA, O.; FODOR, G.; HOŠEK, J.; ANDREEV, S. AI-Aided Integrated Terrestrial and Non-Terrestrial 6G Solutions for Sustainable Maritime Networking. IEEE NETWORK, 2022, vol. 36, no. 3, p. 183-190. ISSN: 0890-8044. (https://ieeexplore.ieee.org/document/9829372)
• KOMOSNÝ, D. General Internet service assessment by latency including partial measurements. PeerJ Computer Science, 2022, vol. 8, no. 1, p. 1-15. ISSN: 2376-5992. (https://dspace.vut.cz/items/81b4e676-95b8-4244-ac1a-916d8541cce2)
• KOMOSNÝ, D. Evidential value of country location evidence obtained from IP address geolocation. PeerJ Computer Science, 2023, vol. 9, no. neuvedeno, p. 1-20. ISSN: 2376-5992. (https://dspace.vut.cz/items/a02fec3a-45bf-4b4c-b0e2-494b3b578c24)
• TAFINTSEV, N.; MOLTCHANOV, D.; CHIUMENTO, A.; VALKAMA, M.; ANDREEV, S. Airborne Integrated Access and Backhaul Systems: Learning-Aided Modeling and Optimization. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2023, vol. 72, no. 12, p. 16553-16566. ISSN: 1939-9359. (https://ieeexplore.ieee.org/document/10175634)
• FUJDIAK, R.; BLAŽEK, P.; SLÁČIK, J.; MLÝNEK, P.; DROZD, M.; CHMELAŘ, P.; POHNER, M.; MLÍCH, J.; MIŠUREC, J.: VI2VS/600-GEN; Big data generator for critical energy infrastructure communication protocols (https://www.vut.cz/en/rad/results/detail/160900#vysledek-160900)

Group website: https://www.utko.fekt.vut.cz/en/energy-and-smart-grids

We deal with communication technologies and protocols for data transmission within the emerging communication scenarios for end users (Internet of Things) and industrial enterprises (Industry 4.0). The key point of research activities is the ability to design, construct and verify the functionality of the proposed devices and the subsequent software implementation of selected functionalities. Attention is focused on the development of terminal devices (sensors for measuring physical quantities) and communication units (aggregation gateways), which are deployed within intelligent networks (Smart Grids).

Main research activities

• Industrial communication systems (verification of communication parameters of LPWA technologies for M2M data transmission within Industry 4.0)
• Industrial networks and control systems (new automation solutions, digitization, localization and inventory, industrial communication protocols, transmission technologies with minimal response and high reliability, advanced virtualization and cyber-physical systems, IT/OT convergence, control systems, programmable logic controllers - PLC , implementation of technological solutions within the concepts of Industry 4.0 and smart factories)
• Use of electronic wearability in industrial applications (research of new communication technologies and protocols for wearable devices)
• Smart home (design of aggregation mechanisms for data processing within a smart home or automated buildings, development of prediction algorithms for automatic adjustment of household parameters based on user habits)
• Optical fiber sensors (measurement of temperature, pressure and vibration by single point and distributed sensor systems, design and implementation of sensor systems - phase sensitive OTDR, Raman OTDR, interferometers, FBG grating sensors, evaluation measurements)

Main research results

• ŠTŮSEK, M.; MOLTCHANOV, D.; MAŠEK, P.; MIKHAYLOV, K.; ZEMAN, O.; ROUBÍČEK, M.; KOUCHERYAVY, Y.; HOŠEK, J. Accuracy Assessment and Cross-Validation of LPWAN Propagation Models in Urban Scenarios. IEEE Access, 2020, vol. 8, no. 1, p. 154625-154636. ISSN: 2169-3536. (https://dspace.vut.cz/items/b6624612-0dd6-4a5a-957f-9543aadad0dd)
• SAAFI, S.; FODOR, G.; HOŠEK, J.; ANDREEV, S. Cellular Connectivity and Wearable Technology Enablers for Industrial Mid-End Applications. IEEE COMMUNICATIONS MAGAZINE, 2021, vol. 59, no. 7, p. 1-7. ISSN: 0163-6804. (https://ieeexplore.ieee.org/document/9502661)
• ŠTŮSEK, M.; MOLTCHANOV, D.; MAŠEK, P.; MIKHAYLOV, K.; HOŠEK, J.; ANDREEV, S.; KUCHERYAVY, E.; KUSTAREV, P.; ZEMAN, O.; ROUBÍČEK, M. LPWAN Coverage Assessment Planning without Explicit Knowledge of Base Station Locations. IEEE Internet of Things Journal, 2022, vol. 9, no. 6, p. 4031-4050. ISSN: 2327-4662. (https://ieeexplore.ieee.org/document/9507528)
• ŠTŮSEK, M.; MAŠEK, P.; MOLTCHANOV, D.; STEPANOV, N.; HOŠEK, J.; KOUCHERYAVY, Y. Performance Assessment of Reinforcement Learning Policies for Battery Lifetime Extension in Mobile Multi-RAT LPWAN Scenarios. IEEE Internet of Things Journal, 2022, vol. 9, no. 24, p. 25581-25595. ISSN: 2327-4662. (https://ieeexplore.ieee.org/document/9854077)
• MYŠKA, V.; LEVEK, V.; BURGET, R.; KOLAŘÍK, M.; ŠTEFFAN, P.; HÁZE, J. IoT mechatronic access control system ePRO 1.4. IEEE Consumer Electronics Magazine, 2023, p. 1-8. ISSN: 2162-2248. (https://ieeexplore.ieee.org/document/10313021)
• MLÝNEK, P.; JURÁŇ, R.; MRÁZ, Ľ.; Sewio Networks s.r.o., Brno, Medlánky: Moving Object Position Tracking Assembly. 37207, (2023) (part of Sewio loclization system - https://www.sewio.net/)
• MLÝNEK, P.; MAŠEK, P.; MIŠÁK, S.: SmartModule_CAT; Modular IoT communication module. VUT FEKT UTKO Technická 12, 61600 Brno (Part of #VodafoneUniLab - https://www.vodafone.cz/podnikatele/internet-veci/unilab/)

Leader: Assoc. Prof. Pavel Šteffan

Primarily we develop measuring and monitoring systems to manage experiments and to measure with electrochemical sensors. Our other interests are mainly within building automation, telemetry, and the unique identification of persons. Upon the completion of a project, the end customers are presented with custom-designed, ready-to-use systems including appropriate software.

Major 4-year outputs:

• The engineering and development of 1st and 2nd generation intelligent programmable lock cylinder assemblies for the TOKOZ company; both product lines are commercially manufactured and delivered to users.
• Smart lighting sources designed and developed on demand from the ESYST company; the intensity and color of the light are variable to suit the customer’s preferences
• A triaxial nanopositioning device to measure optical resonators; the device was engineered jointly with the BD Sensors company, where it also finds use in the manufacturing of pressure sensors.
• A monitoring system to measure composite materials.
• The CANet – Universal CAN-bus Sensor Network.
• Software for the Honeywell Lyric Wi-Fi programmable thermostat.
• A data-logger for an optical spectral analyzer.

Leader: Assoc. Prof. Lukáš Fujcik

A part of our researchers develop chips used in the processing of sensor signals, such as those from bio-, chemo-, and pressure sensors. We also investigate various types of AD and DA converters (or their components), including, for example, reference sources, samplers, and filters. Moreover, the group’s program incorporates solving special systems for space applications through all design and development stages.

Major 4-year output:

• A universal portable potentiostat (nanoPOT).
• A functional sample with CDTA and CCTA integrated circuits for the current mode.
• An integrated circuit to measure biologically and toxically significant substances.
• An integrated system for EMG signal processing.
• A tester to assess radiation in AD converters.
• A module to regulate the temperature of samples in radiation experiments.

Leader: Ing. Tomáš Kříž, Ph.D.

We deal with modelling of electromagnetic fields in the low and high frequency region, we solve temperature problems including flow and coupled (electromagnetic + temperature) problems. In the low-frequency domain, we focus on solving problems in quasi-stationary or harmonic steady state (electromagnets, actuators, sensors or clamping systems) and also on solving transient processes in components or devices. In the high-frequency area, we focus on the design of planar structures, excitation coils used in spectroscopy or the design of saddle coils used in nuclear magnetic resonance. In thermal calculations, we deal with the heating of devices due to Joule or electromagnetic losses and their cooling, heat transfer from solid structures to liquids or gases (heat exchangers, water heaters).

The most important solved projects:

• EMC analysis and assessment of a multi-cell low-floor tramway 35T – Chemnitz, from 26. 3. 2018 to 14. 12. 2018
• GA17-00607S, Complex Artificial Electromagnetic Structures and Nanostructures, from 1. 1. 2017, to 31. 12. 2019

The most important publications:

• ZUKAL, J.; SZABÓ, Z.; KŘÍŽ, T.; KADLEC, R.; DĚDKOVÁ, J.; FIALA, P. A Robust Generator-Harvester for Independent Sensor Systems. Applied Sciences - Basel, 2024, vol. 14, no. 3, p. 1-16. ISSN: 2076-3417.
• DREXLER, P.; NEŠPOR, D.; KADLEC, R.; KŘÍŽ, T.; NEBOJSA, A. Simulation and Characterization of Nanostructured Electromagnetic Scatterers for Information Encoding. Electronics (MDPI), 2022, vol. 11, no. 20, p. 1-12. ISSN: 2079-9292.
• HANZELKA, M.; DAN, J.; FIALA, P.; DOHNAL, P. Human Psychophysiology Is Influenced by Low-Level Magnetic Fields: Solar Activity as the Cause. Atmosphere, 2021, vol. 12, no. 12, p. 1-10. ISSN: 2073-4433.
• DREXLER, P.; FIALA, P.; KADLEC, R.; LONDÁK, P.; MÁDROVÁ, T.; KLÍMA, M.; ZUKAL, J. Numerical modeling and experimental verification of a low fluid flow inductive flowmeter. FLOW MEASUREMENT AND INSTRUMENTATION, 2021, vol. 78, no. 1, p. 1-12. ISSN: 0955-5986.
• ZUKAL, J.; FIALA, P.; SZABÓ, Z.; DĚDKOVÁ, J.; PERNICA, R. Coupled Numerical Model of Vibration-Based Harvester. Applied Sciences - Basel, 2020, vol. 10, no. 8, p. 1-25. ISSN: 2076-3417.
• SZABÓ, Z.; FIALA, P.; ZUKAL, J.; DĚDKOVÁ, J.; DOHNAL, P. Optimal Structural Design of a Magnetic Circuit for Vibration Harvesters Applicable in MEMS. Symmetry, 2020, vol. 12, no. 1, p. 1-18. ISSN: 2073-8994.

Leader: doc. Ing. Martin ŠTUMPF Ph.D.

Research activities of the Lerch Lab of Electromagnetic Research are aimed at the mathematical modeling of propagation, scattering and diffraction of electromagnetic (EM) pulses in complex media, at the solution of direct and inverse multi-physics problems with an emphasis on applications of pulsed EM fields in computational electromagnetics, ElectroMagnetic Compatibility (EMC) and antenna engineering. The numerical and analytical methods developed in the Lerch Lab show the high computational efficiency, thus offering orders-of-magnitude savings of computational resources with respect to standard commercial EM solvers. They can be applied to a wide class of problems including the signal integrity on high-speed interconnects, design and optimization of wireless inter-chip or on-body EM signal transfers, analysis and synthesis of nano-antennas, electromagnetically transparent nano-layers, the time-domain EMI analysis of power transmission lines and many others. Recent applications aim at developing new methodologies for the interpretation of transient EM data (e.g., for the detection and localization of conductive objects in the ground, meaurement of electrical conductivity, etc.).

Projects:

• Interakce pulsního EM pole s tenkovrstvými strukturami (GAČR) https://www.vut.cz/vav/projekty/detail/30852
• Aplikace časoprostorové reciprocity ve výpočetní elektromagnetické kompatibilitě (GAČR) https://www.vut.cz/vav/projekty/detail/27304
• Virtuální prototypování a validace elektromagnetických systémů (TAČR) https://www.vut.cz/vav/projekty/detail/29742

Outputs:

• Fundamentálně nová numerická metoda pro analýzu planárních vícevrstvých anténních a mikrovlnných struktur přímo v časové oblasti: "Cagniard-DeHoop Method of Moments" (viz ŠTUMPF, M. Metasurface Electromagnetics: The Cagniard-DeHoop time-domain approach. London, UK: The Institution of Engineering and Technology, 2022. a ŠTUMPF, M. Time-domain Electromagnetic Reciprocity in Antenna Modeling. Hoboken, NJ, USA: Wiley--IEEE Press, 2019.);
• Výpočetní nástroj pro analýzu a syntézu antén AToM (Antenna Toolbox for MATLAB) a nástroj pro řešení optimalizačních úloh FOPS (Fast Optimization ProcedureS); http://www.antennatoolbox.com/
• Aplikace teorému reciprocity pro kompletní charakterizaci multi-portových anténních systémů (viz ŠTUMPF, M. Electromagnetic Reciprocity in Antenna Theory. Hoboken, NJ, USA: IEEE-Wiley Press, 2017.);
• Původní numerická metoda pro efektivní analýzu signálové integrity na deskách plošných spojů: "Time-Domain Contour Integral Method" (viz ŠTUMPF, M. Pulsed EM Field Computation in Planar Circuits: The Contour Integral Method. Boca Raton, FL, USA: CRC Press, 2018.)
• Generátor pulsů pro aplikace využívající interpretaci elektromagnetických transientních dat (např. detekce a lokalizace vodivých objektů v zemi)
• Nové metodologie pro detekci a lokalizaci vodivých objektů v zemi a pro měření elektrické vodivosti v časové oblasti viz DOLEŽAL, T.; KADLEC, P.; ŠTUMPF, M. Characterizing Scalar Metasurfaces Using Time-Domain Reflectometry. IEEE Access, 2022, roč. 10, č. 1, s. 9677-9685. ISSN: 2169-3536.

Leader: prof. Ing. Roman MARŠÁLEK Ph.D.

Group website: http://www.six.feec.vutbr.cz/research-groups/mobile-communications-2/

The subject of our research is related to current and prospective mobile communication systems, and networks, with an emphasis on their physical layer. Our scientists are active in research of new modulation techniques, signal processing methods for mobile communication receivers or IoT devices, and in design of their physical layer parameters. An important direction of our activity is also the design of algorithms to compensate for imperfections in the radio-frequency elements of the radio communication chain. Considering future requirements for high mobility of devices, our attention is also focused on communication between moving users (V2V and V2X communication). Recently, a significant part of our work is devoted to the security and robustness of 5G mobile networks, including networks with open architecture (OpenRAN), with our research in this area supported by projects of the Ministry of Interior of the Czech Republic. Within the COST 6G-PHYSEC project, we are active member of a European consortium in the area of physical layer security of 5G and 6G systems.

Within the framework of joint applied and basic research projects, we cooperate with leading academic institutions active in the field of mobile communications (e.g. TU Wien, JKU Linz) and with key industrial partners (e.g. Volkswagen AG, CISC GmH, Honeywell, Racom a.s.).

Projects:

• https://starfos.tacr.cz/en/projekty/VK01030166?query=t5myaadftxza
• https://starfos.tacr.cz/en/projekty/VJ03030044?query=t5myaadftxza
• https://starfos.tacr.cz/en/projekty/TJ04000302?query=7j2iaade47ca
• https://starfos.tacr.cz/en/projekty/TH02010602?query=7j2iaade47ca
• https://starfos.tacr.cz/en/projekty/LTC18021?query=5lxaaadfa3ea

Outputs:

• HARVÁNEK, M.; MARŠÁLEK, R.; KRÁL, J.; GÖTTHANS, T.; BLUMENSTEIN, J.; POSPÍŠIL, M.; RUPP, M. Adjacent Channel Interference Cancellation in FDM Transmissions. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2020, roč. 67, č. 12, s. 5417-5428. ISSN: 1558-0806.
• KRÁL, J.; GÖTTHANS, T.; MARŠÁLEK, R.; HARVÁNEK, M.; RUPP, M. On Feedback Sample Selection Methods Allowing Lightweight Digital Predistorter Adaptation. IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, 2020, roč. 67, č. 6, s. 1976-1988. ISSN: 1558-0806.
• SKOCAJ, M.; DI CICCO, N.; ZUGNO, T.; BOBAN, M.; BLUMENSTEIN, J.; PROKEŠ, A.; MIKULÁŠEK, T.; VYCHODIL, J.; MIKHAYLOV, K.; TORNATORE, M.; DEGLI ESPOSTI, V. Vehicle-to-Everything (V2X) Datasets for Machine Learning-Based Predictive Quality of Service. IEEE COMMUNICATIONS MAGAZINE, 2023, roč. 61, č. 9, s. 106-112. ISSN: 1558-1896.
• ZEDKA, R.; BOBULA, M.; BLUMENSTEIN, J.; POLÁK, L.; RUPP, M. Full-Rate Space-Time Line Code with Asymptotic SNR Gain. IEEE Communication Letters, 2023, roč. 27, č. 5, s. 1307-1311. ISSN: 1089-7798.
• Kanálový emulátor – funkční vzor - https://www.vut.cz/vav/vysledky/detail/184161#vysledek-184161
• Vysílač a přijímač v pásmu 60 GHz pro měření aktivit osob – funkční vzor - https://www.vut.cz/vav/vysledky/detail/181396#vysledek-181396

Leader: Ing. Peter BARCÍK Ph.D.

Group website: https://www.urel.fekt.vut.cz/en/optical-communications-research-group-optabro

The optical communication group focuses on studying optical wireless links with a special emphasis on atmospheric effects. The research group encompasses several expert tasks, including: investigating the functional components of the transmitting and receiving units in the communication chain, from their development and testing to implementation in optical wireless links; measuring and modeling the atmospheric transmission environment in the optical spectrum, with a focus on coherent optical waves; and optimizing the optical beam intensity profile to reduce the negative effects of the transmission medium on the transmitted information. Our current research on optical wireless links is focused on measuring atmospheric effects and enhancing data link quality. Promising trends in this field include the transmission of highly stable optical frequencies, applicable for time, frequency, and length measurements. Additionally, the research group has developed mobile optical wireless terminals that automatically align with the counterpart and enable tracking of slowly moving communication terminals.

Projects:

• TN02000020, Centre of Advanced Electron and Photonic Optics, zahájení: 01.01.2023, ukončení: 31.12.2028, https://starfos.tacr.cz/en/projekty/TN02000020?query=xhcyaadblvmq
• VI20192022173, Robustní systém optické bezvláknové komunikace, zahájení: 01.07.2019, ukončení: 31.12.2022, https://starfos.tacr.cz/en/projekty/VI20192022173?query=4evyaaclonva

Outputs:

• KOLKA, Z.; BARCÍK, P.; SKRYJA, P.; WILFERT, O.; BIOLKOVÁ, V.; NĚMEČEK, J.: MOB-FSO; Mobilní jednotka FSO. Vysoké učení technické v Brně Ústav radioelektroniky, FEKT Technická 3082/12 616 00 Brno Kontaktní osoba: prof. Dr. Ing. Zdeněk Kolka, kolka@vut.cz, tel: +420 541 146 554. (funkční vzorek), https://starfos.tacr.cz/en/vysledky-vyzkumu/RIV%2F00216305%3A26220%2F21%3APR36069?query=4evyaaclonva
• BARCÍK, P.; KOLKA, Z.; WILFERT, O.; BIOLKOVÁ, V.; HRABINA, J.; PRAVDOVÁ, L.; ČÍP, O.; KŮR, J.: FSO-DIS; Sestava bezdrátového optického spoje pro šíření optických frekvencí volným prostorem. Vysoké učení technické v Brně Ústav radioelektroniky, FEKT Technická 3082/12 616 00 Brno Kontaktní osoba: Kontaktní osoba: Ing. Peter Barcík, Ph.D., barcik@vut.cz, tel: +420 541 146 589, mobil: +420 777522966. (funkční vzorek), https://starfos.tacr.cz/en/vysledky-vyzkumu/RIV%2F00216305%3A26220%2F22%3APR37043#result-main
• BARCÍK, P.; HRABINA, J.; ČÍŽEK, M.; KOLKA, Z.; SKRYJA, P.; PRAVDOVÁ, L.; ČÍP, O.; HUDCOVÁ, L.; HAVLIŠ, O.; VOJTĚCH, J. Phase-Noise Characterization in Stable Optical Frequency Transfer over Free Space and Fiber Link Testbeds. Electronics (MDPI), 2023, roč. 12, č. 23, s. 1-12. ISSN: 2079-9292. https://doi.org/10.3390/electronics12234870
• BARCÍK, P.; WILFERT, O. Possibility of compromising the security of free space optics communications caused by scattering on fog particles. OPTICS EXPRESS, 2022, roč. 30, č. 22, s. 40196-40207. ISSN: 1094-4087. https://doi.org/10.1364/OE.470757

Leader: prof. Ing. Aleš PROKEŠ Ph.D.

Group website: https://www.urel.fekt.vut.cz/en/radio-frequency-and-cable-free-optical-systems-research-group

The Radiofrequency Systems Group is engaged in V2X communication, with a particular focus on the specific characteristics of millimeter wave (MMW) propagation in various scenarios, dominantly in complex urban environments and suburban areas. The characteristics of time-varying channels are investigated in terms of both temporary and long-term changes. Recently, the team has also dealt with channel analyses considering weather effects (rain, snowfall, frost). The outcome of this research includes MMW channel characterization in time, delay, Doppler, and frequency domains, and development of statistical channel models for future 5G and 6G systems created using real measured data. In the area of channel measurement and modelling we cooperate with Vienna University of Technology; Austrian Institute of Technology, Vienna; University of Southern California, Los Angeles; National Institute of Technology, Durgapur, India; Military University of Technology, Warsaw; Ilmenau University of Technology; and University of Bologna.

Another R&D area includes an accurate real-time localization, tracking and identification of objects based on a multilateration surveillance system. Currently, our team cooperates with the ERA a. s. company in the field of system design and optimization, signal processing, and hardware implementation with the aim of creating a new Air Traffic Management system.

The Radiofrequency systems group is further involved in several other R&D areas, such as network wireless communication for secure control systems and sensors based on LoRaWAN technology solved in cooperation with ACRIOS Systems s.r.o. company, design of RFID air interface protocols in cooperation with CISC Semiconductor GmbH, Austria, or implementation of RF system algorithms into a software defined radio for a number of applications including the conformance testing of RFID protocols and tags, or development and realization of MMW channel sounders.

Projects:

• GF23-04304L, Multi-band prediction of millimeter-wave propagation effects for dynamic and fixed scenarios in rugged time-varying environments, start: 01/01/2023, end: 1/12/2028, https://starfos.tacr.cz/en/projekty/GF23-04304L?query=2w5qaac7sskq
• TK04020173, Adaptive Mesh Communications for Secure Control and Sensing Systems, start: 01/01/2022, end: 31/12/2024, https://starfos.tacr.cz/en/projekty/TK04020173,
• CZ01.01.01/0 1 122 002/0000848, Nová generace letištního multilateračního systému MSS-5 PDT, start: 01/03/2024, end: 31/12/2026, https://www.era.aero/cs/o-nas/novinky/era-a-vut-spojily-sily-a-pripravuji-novou-generaci-multilateracniho-systemu-pro-letiste

Outputs:

• SKOCAJ, M.; DI CICCO, N.; ZUGNO, T.; BOBAN, M.; BLUMENSTEIN, J.; PROKEŠ, A.; MIKULÁŠEK, T.; VYCHODIL, J.; MIKHAYLOV, K.; TORNATORE, M.; DEGLI ESPOSTI, V. Vehicle-to-Everything (V2X) Datasets for Machine Learning-Based Predictive Quality of Service. IEEE COMMUNICATIONS MAGAZINE, 2023, vol. 61, no. 9, p. 106-112. ISSN: 1558-1896. https://doi.org/10.1109/MCOM.004.2200723
• GHOSH, A.; CHANDRA, A.; MIKULÁŠEK, T.; PROKEŠ, A.; WOJTUŃ, J.; ZIÓŁKOWSKI, C.;. Vehicle-to-Vehicle Path Loss Modeling at Millimeter-Wave Band for Crossing Cars. IEEE Antennas and Wireless Propagation Letters, 2023, vol. 22, no. 9, p. 2125-2129. ISSN: 1548-5757. https://doi.org/10.1109/LAWP.2023.3277961
• ZÖCHMANN, E.; HOFER, M.; LERCH, M.; PRATSCHNER, S.; BERNADO, L.; BLUMENSTEIN, J.; CABAN, S.; SANGODOYIN, S.; GROLL, H.; ZEMEN, T.; PROKEŠ, A.; RUPP, M.; MOLISCH, A.; MECKLENBRÄUKER, C. Position-Specific Statistics of 60 GHz Vehicular Channels During Overtaking. IEEE Access, 2019, vol. 7, č. 1, p. 14216-14232. ISSN: 2169-3536. https://doi.org/10.1109/ACCESS.2019.2893136
• SHUKLA, R.; SARKAR, A.; CHANDRA, A.; ZIÓŁKOWSKI, C.; MIKULÁŠEK, T.; PROKEŠ, A. A simple ANN-MLP model for estimating 60-GHz PDP inside public and private vehicles. EURASIP Journal on Wireless Communications and Networking, 2023, vol. 2023, no. 1, p. 1-16. ISSN: 1687-1499. https://doi.org/10.1186/s13638-023-02257-0

Leader: doc. Ing. Tomáš GÖTTHANS Ph.D.

The newly formed Space Applications Group is focused on research, development and testing of technologies for space exploitation, and operation of various space applications.

In the framework of projects funded by the European Space Agency (ESA), we are researching promising radio communication subsystems for communication with satellites (high-efficiency radio transceivers, high-efficiency amplifiers, emulators and subsystems for communication with UAVs), and we also participated in the development of the radar for the Hera mission. We are currently interested in the future potential use of 5G techniques in non-terrestrial networks (so called 5G NTN), whereby our activities partly overlap with those of the Mobile Communications Group.

We have many years of experience in the operation of the terrestrial segment of satellite communications (we started with AMSAT satellites, now we provide communication links with the BDSAT-2 satellite or GRBAlpha gamma-ray tracking satellite). We cooperate with industrial and academic institutions from the region and from the whole world (for example, AMSAT, Masaryk University, Observatoire de Paris, Honeywell International s.r.o. or BD Sensors, s.r.o.).

Projects:

• L band unmanned aerial vehicle transceiver for connectivity in all flight phases (European space agency) https://www.vut.cz/vav/projekty/detail/36040
• Fully adaptive RF lineariser for high power amplifiers (European space agency) https://www.vut.cz/vav/projekty/detail/29700
• Low Frequency Radar for Hera Mission - Phase A (European space agency) https://www.vut.cz/vav/projekty/detail/30541

Outputs:

• PÁL, András; OHNO, Masanori; MÉSZÁROS, László; WERNER, Norbert; ŘÍPA, Jakub et al. GRBAlpha: The smallest astrophysical space observatory. Online. Astronomy & Astrophysics. 2023, roč. 677. ISSN 0004-6361.
• ŘÍPA, Jakub; TAKAHASHI, Hiromitsu; FUKAZAWA, Yasushi; WERNER, Norbert; MÜNZ, Filip et al. The peak flux of GRB 221009A measured with GRBAlpha. Online. Astronomy & Astrophysics. 2023, roč. 677. ISSN 0004-6361.
• GOTTHANS, Tomas; MARSALEK, Roman; URBANEC, Tomas; SLANINA, Martin; KUCERA, Ondrej et al. L-Band Digital Doherty SSPA Design for Compact SATCOM Terminal Applications. In: 2020 50th European Microwave Conference (EuMC). IEEE, 2021, s. 784-787. ISBN 978-2-87487-059-0.