Persönlicher Status und Werkzeuge

Open Theses

You may also contact one of our doctoral candidates directly, if you are interested in a Bachelor or Master thesis, a student job, an "Ingenieurspraxis" or a "Forschungspraxis". It often happens, that topics are being prepared which are not adverdised yet. It may also be possible to find a topic matching your specific interests.
Please include a curriculum vitae together with a list of attended courses when applying for a thesis.
If your "Ingenieurspraxis" is selected to be supervised by one of our professors, please hand in the documents to Doris Dorn (Room N2401).

Master/Diploma Theses


A Deterministic Approach to the Gaussian Multiple-Input Multiple-Output (MIMO) Broadcast Channel
Multi-user communication systems (such as wireless systems) are different than point to point channels in two key aspects; namely, the broadcast nature of transmissions (e.g., wireless transmissions can be picked up by any receiver in the vicinity of the transmitter) and the superposition (e.g., a wireless receiver picks up a linear combination of transmissions from all transmitters in its vicinity). Recently a deterministic approach to multi-user information theory has proved promising by achieving progress in some of the long-standing open problems by finding approximate solutions. The idea behind a deterministic approach, on a high level, is to focus on the interaction of signals rather than the background noise, through a simpler appropriate model; find exact solutions for the simpler model; and then translate the intuitions and techniques to new techniques and/or approximate solutions on noisy models.
The goal of thesis is to undertake a deterministic approach to Gaussian MIMO broadcast channels.
Prerequisite: Linear Algebra, Information Theory
Supervisor: Shirin Saeedi

Role of Feedback in Broadcasting
This project intends to investigate the role of feedback in broadcast channels. More information available upon request. Pre-requisite (at least one of the following):
Basic knowledge of Network Coding (see [2])
Basic knowledge of Algorithms
Basic knowledge of Information Theory
Supervisor: Shirin Saeedi

Powerline Communication for industrial application
Powerline Communication (PLC) is a well established technology for in-building data transmission. The HomePlug standard provides an easy to use interface. PLC is charackterized by modulation and coding schemes which ensure robustness against impuslsive noise and disruptions by the power transmission and transformation. Hence, the PLc becomes an interesting approach for industrial applications such as power charging stations for electrical cars or in the field of smart grid. This Master thesis shoudl analyze the PLC technology on the basis of the HomePlug Greenphy standard and its realization in todays chipsets. In particular, the optimization of the given PLC realizations for industrial use will be the focus of this work. This MAster thesis will be done in cooperation with Siemens AG Corporate Technology.
Supervisor: Elisabeth Oberleithner

Ingenieurspraxis


SDR - DAB Real Time Receiver in Simulink

Software Defined Radio is a relatively new concept in thinking and designing communications systems. What defines it is that almost all parts of a transciever (transmitter/receiver) are implemented as software modules on a general purpose computer, rather than on dedicated hardware. The radio frequency part of the receiver is thus also reconfigurable through software and will represent just an interface.

Simulink is a graphical programming tool from Mathworks and is especially good for fast prototyping and simulating of complex systems. It provides many custom made software modules and light and easy way to set up graphical user interfaces.

The purpose of this project is that following the principles of SDR radio and the facilities offered by Matlab/Simulink you could build a real-time receiver for DAB. DAB (Digital Audio Broadcasting) is a digital radio communication standard for broadcasting radio stations intended to replace the old fashioned AM and FM radio systems.

Links:

http://en.wikipedia.org/wiki/Software-defined_radio

http://en.wikipedia.org/wiki/Digital_Audio_Broadcasting

http://de.mathworks.com/products/simulink/

Supervisor: Andrei Nedelcu

Open Student Jobs

no news in this list.

Theses in Progress

Bachelor Theses


Alexis Gonzalez-Argüello: Development of a Computer Implementation of Computational Methods for Time-harmonic Electromagnetic Field Modeling
Supervisor: Gerhard Kramer, Stellenbosch-University, South Africa, Prof. M. Botha

Diego Lentner: Blind Mutual Information Estimation Techniques
Mutual Information (MI) is a key quantity of information theory as it is the achievable rate of transmission. Estimating MI can be a challenging task for a channel whose transition probabilities are unknown, such as the optical channel. Different estimation techniques, including histograms and kernel density estimators, are investigated for rectangular quadrature amplitude modulation over an additive white Gaussian noise channel with varying signal-to-noise ratio.
Supervisor: Tobias Fehenberger

Sahiti Akella: Optical Fiber Channel
TBD
Supervisor: Mansoor Yousefi

Ekin Alican Igdir: Cooperative Communication using Software Defined Radio
Topic:

By using software-defined radio (SDR) equipments, the development of communication systems can be done totally in software. This allows quick prototyping of communication systems and testing them on real scenarios under real channel conditions.

In our institute, we have SDR equipments that can be used for this purpose. The aim of this work is to build a communication systems to test and evaluate the performance of different relaying techniques. The tasks of the student can be listed as follows:

  • Literature review on the relaying techniques and their theoretical performance evaluation,
  • Implementation of the techniques with SDR,
  • Performance evaluation of the techniques according to different criteria (transmit power, relay location, resource allocation parameters, etc.),
Requirements:
  • Interest in the topic,
  • Background in communications engineering topics,
  • Programming skills (in MATLAB),
  • Experience with software defined radios (especially with USRP) and GNURadio is not mandatory, but is a plus.
References:
  • More information about SDR and USRP in Wikipedia
  • Kramer, G., Marić, I., & Yates, R. D. (2006). Cooperative communications. Foundations and Trends in Networking, 1(3), 271-425.
Supervisor: Onurcan İşcan

Master/Diploma Theses


Julian Schiele: Analytical and Numerical Studies on the Capacity Region for Index Coding
Index Coding is a special case of network coding and is interesting because of increasing demand for efficient wireless communication, e.g. video-on-demand applications. The index coding problem deals with communication scenarios where one sender wants to transmit N messages to N receivers over a single common link with presence of priori side information at the receivers. In addition to aforementioned applications, our main motivation to study index coding problems is the fact that the multiple unicast network coding problem, which is one of the most important challenges in network information theory, can be recast as an instance of the index coding problem. Although the capacity region is generally not known, several inner bounds have been developed. We study the composite coding inner bound and develop a computational framework to evaluate the inner bound for small N. We further exploit structural properties of the capacity region to decompose large problems into smaller ones which we know how to tackle. For an outer bound on the capacity region, we start from the polymatroidal outer bound resulting from the submodularity of the entropy and derive its corollaries which involve characteristics of side information graphs that are often more intuitive and easier to analyze. As in the case of the inner bound, a computational framework will also be developed for the evaluation of those outer bounds.
Supervisor: Jie Hou, Ali Amjad, Prof. Young-Han Kim

Markus Jäger: Advanced Concept for enhancing Nomadic Relay Network Performance in 5G systems
In this master thesis, the power control algorithms jointly with advanced relay concept will be investigated in the context of nomadic relay network for reliably expanding coverage and improving system capacity. Nomadic Relay (NR) in 5G refers to the approach by using parked vehicles as potential relaying candidates, to provide coverage expansion, capacity enhancement, or to increase energy efficiency. Due to the randomness of NR distributions, dynamic power control is an essential technique for relay activation without generating fatal interference to the other users in the network. Based on the previous framework, distributed power control schemes (comprises the power control of both relay backhaul link and access link) of nomadic relay network will be combined with user assignment for coverage optimization. The goal is to activate relays and handover users, whereas the SINR requirements of all the users are not violated. Furthermore, advanced cooperative relaying schemes will be evaluated jointly with the power control algorithms to further optimize the coverage and capacity, under the constraints of user QoS and network energy consumption.
Supervisor: Michael Heindlmaier, Dr. Peter Fertl, Ren Zhe (BMW Forschung und Technik)

Fabian Steiner: LDPC Coded Modulation for Bit-Metric Decoding
Many practical coded modulation systems can be modeled by transmitting each codeword over a set of parallel channels, i.e., the coded bits experience different channels with different reliabilities. This setting poses several challenges to traditional code design approaches. This thesis aims at developing practically feasible code design approaches for low-density parity-check codes that are able to cope with the previously described difficulties. The achieved code performance is compared to off-the-shelf (DVB-S2) codes.
Supervisor: Georg Böcherer, Gianluigi Liva

Martinez Laura Pastor: SDR based experimental setup for evaluating system performance with QAM and differential PSK
The purpose of this thesis is the application of Software Defined Radio (SDR) as an experimental environment for investigating the performance of various modulation schmemes. Besides, this work should provide an insight into the possibilities SDR offers and its application, not only in an educational but also in the research context.
Supervisor: Elisabeth Oberleithner

Tobias Fülle: Preamble recognition on NC-OFDM modulation for dynamic synchronization
Within a public subsidized research project called COUWBAT, the student will develop a combined ultra-wide band and cognitive radio HW-Transceiver to increase the spectrum efficiency and data rates through the utilization of the so-called white spaces for secondary users. Therefore, the NC-OFDM method will be applied to switch certain subcarriers on and off. Later on, evaluation of FilterBank Multicarrier (FBMC) is aimed to take place.
Supervisor: Onur Günlü, Manuel Sáez Rodríguez

Jonas Eichler: Device To Device Communication in LTE Mobilfunksystemen
Device to Device (D2D) Kommunikation wird momentan in der Version 12 (Release 12) von LTE spezifiziert. Im Rahmen Ihrer Abschlussarbeit fertigen Sie Studien über die Standardisierung von D2D an und erarbeiten ein Modell des Physical Layers. Besonderer Augenmerk soll hierbei auf die Aspekte der Discovery Prozedur sowie auf die D2D Datenkommunikation gelegt werden. Ihre Studien und Implementationen, welche hauptsächlich in MATLAB erfolgen, werden dann zur Implementation und Verifikation unseres User Equipment Testsystems genutzt. Sie arbeiten während Ihrer Arbeit innerhalb des bestehenden Projektteams für die LTE Implementierung mit. Eine gute und verständliche Implementation der Modelle ist deswegen ebenso erforderlich wie eine einwandfreie Dokumentation.
Supervisor: Stefan Dierks, Moritz Harteneck (Rohde & Schwarz)

Zhaoqi Zhu: Preamble-based Channel Estimation in Coherent Spatial Division Multiplexing OFDM Transmission System
The robustness of the channel estimation is a key for coherent spatial division multiplexing OFDM transmission system. Time-multiplex(TM) preamble structure has been widely adopted in the polarisation division multiplexing OFDM transmission and in the scenario of spatial division multiplexing OFDM transmission supporting 3 spatial modes. When scaling to higher number of spatial modes, the TM based channel estimation introduces huge overhead and is sensitive to laser phase noise. Therefore, subcarrier-orthogonal(SO) preamble structure is a potential candidate for channel estimation. In this work, the TM and SO preamble-based channel estimation will be investigated under the influence of laser phase noise, mode-dependent loss and strong/weak coupling regime of the few mode fiber.
Supervisor: Yingkan Chen

Ingenieurspraxis


Robert Fellendorf: Untersuchung der HF-Parameter für die Eignung zum Einsatz in IM-Messgeräten
Supervisor: Gerhard Kramer, Fa. Rosenberger, Hochfrequenztechnik GmbH & Co. KG, 83413 Fridolfing

Eghbal Darius Ketabtchi: Techn. Support und Kundenservice im Bereich IPTV und Durchführung von Produkttests mit Dokumentation
Supervisor: Gerhard Kramer, Fa. TERACUE AG, Schlossstr. 18, Odelzhausen, M. Schönberger

Shu Liu: Aufbau eines Evaluationsboards mit Vermessung durch einen Multiport-Netzwerk-Analyser
Supervisor: Norbert Hanik, Infineon Technologies AG, IFAG HR BPS SD, 85579 Neubiberg, Hr. R. Kuhn

Dominik Fienko: Integration BS2000 SE Serie in Enterprise System Management
Supervisor: Gerhard Kramer, Fa. Fujitsu Technology Solutions, PDG ES S SWE 057, München

Julian Leyh: Bearbeitung und Erweiterung von FPGA-Komponenten für IP-Paketverarbeitung
Supervisor: Gerhard Kramer, Fa. Rohde & Schwarz GmbH & Co. KG

Daniel Klimsa: Wahrscheinlichkeitsbewertung bei Mehrfachtreffern
Supervisor: Norbert Hanik, Siemens AG, Dr. Blume

Linus Reitmayr: Testmanagement FDDB
Supervisor: Norbert Hanik, BRAIN GmbH, 80809 München

Ömer Tan: Zusammenstellen einer Messtechnikapplikation aus Standard HW/SW-Komponenten
Supervisor: Gerhard Kramer, BMW Group München

Martina Kiechle: Entwicklung eines Kapazitätsplanungstools und Erstellung einer SharePoint 2013 ShowCase Plattform
Supervisor: Gerhard Kramer, Siemens AG, München, Hr. C. Riedelbauch

Tamara Fiedler: Planung und Umsetzung von innovativen AR-Apps für alle BSH-Marken
Supervisor: Gerhard Kramer, Fa. BSH Bosch u. Siemens Hausgeräte GmbH, München, Hr. Clemens

Michael Koller: Integration von Referenzkurven in eine Messung eines Broadcast Signal Analyzers
Supervisor: Gerhard Kramer, Fa. Rohde & Schwarz GmbH & Co. KG, München

Susanne Bernhofer: Entwicklung und Optimierung der Usability-Methoden
Supervisor: Gerhard Kramer, Fa. Hepa Wash GmbH, Hr. Wen Fengfei

Forschungspraxis (12 ECTS)


Dietrich Dumler: GPS/Galileo data reception
The ways to use Software Defined Radio (SDR) equipments to receive and decode GPS and/or Galileo signals are tested. The first part of the internship consists of searching for already existing codes that can be used with our SDR equipments. Later, offline CDMA decoding and synchronization algorithms will be analyzed and parametrized to understand the effect of different techniques.
Supervisor: Onur Günlü