Foto von Karl Tasnad Kernetzky

M.Sc. Karl Tasnad Kernetzky

Technische Universität München

Professur für Leitungsgebundene Übertragungstechnik (Prof. Hanik)

Postadresse

Postal:
Theresienstr. 90
80333 München

Biografie

  • Wissenschaftlicher Mitarbeiter am LNT der TUM seit Dezember 2014
  • M.Sc. der Elektro- & Informationstechnik an der TUM, 2012-2014
  • B.Sc. der Elektro- & Informationstechnik an der TUM, 2009-2012

Abschlussarbeiten

Angebotene Abschlussarbeiten

Laufende Abschlussarbeiten

Masterarbeiten

Kanalschätzung für leitungsgebundene Kanäle bei zeitvarianten Störungen

Kanalschätzung für leitungsgebundene Kanäle bei zeitvarianten Störungen

Beschreibung

- Theoretische/analytische Betrachtung von Kanalschätz-
verfahren für OFDM-Systeme
- Simulation eines trainingsbasierten Kanalschätzers in Matlab
- Implementierung und Test des Kanalschätzverfahrens in
VHDL und Synthese der digitalen Schaltung in einem FPGA
- Funktionsverifikation anhand ein

Kontakt

Betreuer:

Karl-Tasnad Kernetzky - Dr. Thomas Weidinger (Rosenberger)

Student

Matthias Lechner

Implementation and Validation of a FPGA based signal acquisition for ranging and communication applications

Implementation and Validation of a FPGA based signal acquisition for ranging and communication applications

Beschreibung

The optical communication group of DLR’s Institute of Communications and Navigation develops experimental laser systems for optical links. The communication system development contains several subsystems including the signal transition from the analog to the digital domain. This is done by the use of analog to digital converters (ADC) which interface with the processing device, in this case a field programmable gate array (FPGA). As the future operation site will be in space the received and digitalized signal is suffering from several impairments either caused by the optical transmission channel or the transition from the optical to digital domain. In order to recover the received signal e.g. atmospheric turbulences or mismatches caused by the use of free-running ADCs have to be compensated for. The successful applicant will support our team in the development of an experimental setup, in particular by implementing and validating the ADC-to-FPGA interface and further sub-functionality in order to enable signal recovery.

Goals:
- Definition of transmission channel and recovery system impairments and possible countermeasures
- FPGA based integration of a ADC-to-FPGA interface realized by use of the JESD204B standard
- FPGA based integration of signal recovery stages like timing recovery (expandable)
- Testing and validation of the implemented functionality including optional field tests

Voraussetzungen

- Study direction of electrical engineering (Master level)
- Solid skills in VHDL respectively Verilog
- Knowledge in communication theory is a plus
- Experience within the area of analog to digital converters is a plus

Kontakt

raphael.wolf@dlr.de

Betreuer:

Karl-Tasnad Kernetzky - Raphael Wolf (DLR)

Student

Michael Filkorn

Ingenieurpraxis

Porting Flash Programs of the lntWWW to HTML5 and Javascript

Porting Flash Programs of the lntWWW to HTML5 and Javascript

Beschreibung

Porting Flash Programs of the lntWWW to HTML5 and Javascript

Betreuer:

Student

Carolin Mirschina

Forschung

Optical communication links over single mode glass fibers are used for almost all recent ultra-fast data connections, like the back bone of the internet or interconnects between datacenters. The increasing amount of cloud and video-on-demand services requires higher transmission speeds and therefore updated communication systems.

There are different common ways to increase the data rate of a fiber optic communication link: one can use higher order modulation formats (also jointly with probabilistic shaping), simply deploy more fibers (which is expensive), use wavelength division multiplexing (already mostly exploited), or try to modulate different modes of a multi-core or multi-mode optical fiber, which are orthogonal transversal distributions of the optical field in the waveguide.

The capacity of the optical fiber channel is limited by its inherent nonlinear nature. One effect - among others - is a nonlinear distortion of the propagating signal's phase, which in principle can be conmpensated with digital back propagation, but requires way too much processing power for state-of-the-art digital signal processing.

An alternative technique is optical phase conjugation to compensate fiber nonlinearities, where lumped devices are inserted in the fiber link, which invert the signal's phase front. If repeatedly done, phase distortions can be corrected in the optical domain. The conjugation can be realized with integrated silicon devices, where the incident signal and two pump lasers interact over (nonlinear) four wave mixing and generate the conjugated and amplified outbound signal. The four wave mixing efficiency can be increased if the light waves are in different modes of the silicon waveguide. In my research, I am focusing on numerical simulations of waveguide modes and the related nonlinear signal propagation.

Silicon Waveguide, c.f. I. Sackey et al., “1.024 Tb/s wavelength conversion in a silicon waveguide with reverse-biased p-i-n junction,“ Optics Express 25
Transversal Modes of the Silicon Waveguide

Publikationen

2018

  • Kernetzky, T.: Optical Waveguide Modes And How to Compute Them. Munich Doctoral Seminar on Communications (MSC), 2018 mehr…
  • Günlü, O.; Kernetzky, T.; Iscan, O.; Sidorenko, V.; Kramer, G.; Schaefer, R. F.: Secure and Reliable Key Agreement with Physical Unclonable Functions. Entropy, Special Issue on Information Theoretic Security 20 (5), May 2018, Article 340 mehr… Volltext ( DOI )

2017

  • Kernetzky, T.: System and Design Aspects of Zynq FPGA Programming. Joint Workshop on Coding and Communications, Mar 2017 mehr… Volltext (mediaTUM)