Keynote Speaker
Prof. Geza Kolumban
Faculty of Information Eng., Pazmany Peter Catholic University, Hungary

Topic: Software Defined Electronics: A Revolutionary New Approach for the Design and Implementation of Future Telecommunications system

   RF/microwave/optical analog signal processing is substituted in Software Defined Electronics (SDE) by its digital counterpart operating in the low-frequency region referred to as BaseBand (BB). Every application is implemented in SW and the transformation between the BB data streams and real high-frequency analog signals is performed by a universal HW device. The SW implementation offers reconfigurability, high accuracy and flexibility, features that are required in cognitive radio, reconfigurable automated test beds, etc. The most important feature of SDE approach is that the HW and SW components are completely separated, and the same universal HW is used to implement every desired application.
   Although digital signal processing has been around everywhere in the low-frequency applications for many years, until this time it could not satisfy the strict requirements of RF, microwave and optical applications where the (i) ultra-wide dynamic range and (ii) high sampling rate are a must. In our days the situation has been changing rapidly, for example, Software Defined Radio (SDR), Universal Software Radio Peripheral (USRP) and Virtual Instrumentation (VI) all mean that a universal HW device is used to extract the complex envelope of a high-frequency bandpass signal to be demodulated or analyzed, and the radio receiver or signal analyzer is implemented in baseband, entirely in SW. The complex envelope defined in BB features two essential properties: it (i) carries all information available in the original RF bandpass signal and (ii) assures the theoretically attainable minimum sampling rate.
   Transition from research to standards and market is a very time consuming task. The universal PXI-based software defined wireless platform developed by us and discussed in the lecture reduces this transition time considerably because (i) the MATLAB subroutines developed in the research phase are integrated directly, i.e., without any modification, into a LabVIEW platform, (ii) the LabVIEW platform provides a direct access to the PXI-based universal HW device from the SW and (iii) the LabVIEW platform provides access to any kind of stand-alone measurement instruments equipped with the VISA-type remote control capability.
   The lecture will survey the theory of complex envelopes, will introduce the USRP-type and PXI-based universal HW devices and will show how the baseband equivalents of RF/microwave/optical systems can be derived. In research the simulations are performed mostly on MATLAB platform. The lecture will show how a MATLAB simulator can be integrated into the SDE approach in order to get a real working 2.4-GHz FM-DCSK telecommunications system and to perform its RF field tests in real propagation environments. The lecture will be completed with many hands-on examples where the SDE implementation of various wireless communications systems and test equipment will be presented.

About the Speaker:

   Géza Kolumbán, received his M.Sc. (1976) and Ph.D. (1990) degrees from TU Budapest, Hungary, C.Sc. (1990) and D.Sc. (2004) degrees from the Hungarian Academy of Sciences, and his Dr.habil degree (2005) from the Budapest University of Technology and Economics. He is an IEEE Fellow (2005) and an IEEE CAS Distinguished Lecturer (2013-14).
   After his graduation he spent 15 years in professional telecommunications industry, where he participated in the development of high-capacity microwave terrestrial radio relay systems, satellite telecommunications systems and frequency hopping digital radio systems. His research team developed many frequency synthesizers and local oscillators for various applications. After joining the university education, he was the first to prove that chaos exists in autonomous analog phase-locked loops, elaborated the theory of chaotic waveform communications and established noncoherent chaotic communications as a brand new research direction. He developed DCSK and FM-DCSK, the most popular and only feasible chaotic modulation schemes.
   Two of his papers co-authored with Profs. L.O. Chua and M.P. Kennedy have been ranked in top-cited IEEE Trans. CAS-I articles. According to Google Scholar, his publications have been cited more than 2300 times up to now. He has been a visiting professor and researcher to UC Berkeley; The Hong Kong Polytechnic University, City University of Hong Kong; INSA-LATTIS Laboratory, Toulouse, France; University College Dublin and Cork; Swiss Federal Institute of Technology, Lausanne; TU Dresden, Germany. He has been providing consultancy service for National Instruments; Samsung Advanced Institute of Technology, Korea; SSL, Ireland. Prof. Kolumban is the co-founder of Automated Testing for RF and Microwaves Ltd that, based on virtual instrumentation, develops automated calibration and test systems for the microwave industry.
   In 2012, Prof. Kolumbán established the Laboratory of Software Defined Electronics and Virtual Instrumentation (SDE-VI Lab) at the Faculty of Information Technology and Bionics of Pázmány Péter Catholic University. The SDE-VI Lab is equipped with USRP and PXI-based testbeds, FlexRIO FPGA PXIe setup completed with a baseband transceiver adapter and many remote controlled instruments from microwave spectrum analyzer to arbitrary waveform generator. In the SDE-VI Lab any kind of telecommunications systems and test beds can be implemented up to 6.6 GHz using the SDE approach, moreover, various automated calibration and test beds providing traceability can be built.

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