topics for the mscsp advanced research projects winter ...€¦ · topics for the mscsp advanced...

Topics for the MSCSP

Advanced Research Projects

Winter Semester 2013 / 2014

15.08.2013

Selection of topics and submission of

topic sheets until

October 11, 2013.

15.08.2013

Department of Electrical Engineering

and Information Technology

Institute for Information Technology

Head: Prof. Dr. rer. nat. habil. Jochen Seitz

Division of Communication Networks

15.08.2013

• Description: Real time applications require QoS aware protocols. To this end a medium access protocol has been designed for ad hoc wireless networks, SR-MAC. The goal of this project is to evaluate the protocol and assess it in different test scenarios.

• Tasks Evaluation and assessment of the protocol

Amelioration and/or extension of the protocol

• References

• Focus 1 student theory / programming / hardware / measurements

Responsible Professor:

Supervisor:

Prof. Jochen Seitz

Amina Arkoub

Evaluation of the protocol SR-MAC

15.08.2013

• Description: Most protocol performance evaluations are carried out either by means of simulation or by means of analytical

models. In this project we are interested in the analysis of delay and throughput as performance metrics for MAC protocols in wireless ad hoc networks.

Several analytical models for 802.11 DCF have been proposed and used in the literature to evaluate those metrics and to capture the different mechanisms of the protocol. The aim here is to understand Bianchi’s performance model, then modify and adapt it to our protocol.

• Tasks – Brief survey of major performance models for 802.11 DCF/EDCF (saturated, non-saturated, single hop,

multihop)

– Study of Bianchi’s performance model for 802.11 DCF

– Derive an adequate model

• References [1] Guiseppe Bianchi “Performance Analysis of the IEEE 802.11 Distributed Coordination Function”



Supervisor:

Prof. Jochen Seitz

Amina Arkoub

Delay and throughput analysis of ad hoc MAC protocols

15.08.2013

• Description: • A Network Address Translation server is to be simulated in OmneT++.

• The index table of the server should dynamically change its entries to support mobility of users to other subnets (ex. vertical handover).

• This change is invoked by other mobility-support protocols.

• Results from this work should be part of a further vertical handover routing approach.

• Tasks – Literature survey on IP-based networks and NAT server functionality.

– Implementation and Simulation of NAT server using Omnet++.

• References [1] ] Omnet++, http://www.omnetpp.org

Focus 1 student theory / programming / hardware / measurements


Supervisor:

Prof. Jochen Seitz

M. Sc. Atheer Al-Rubaye

Dynamic Index NAT Server

15.08.2013

Resource management in Mobile Ad Hoc

Networks (MANETs) using SNMP

15.08.2013 www.tu-ilmenau.de/ei_ms_csp


Research Advisor: E-Mail:

Prof. Jochen Seitz

M.Sc. Aymen Al-Ani [email protected]

• Description:

Resource management plays the major role in QoS provisioning and efficient utilization of network

resources. In MANETs, monitoring of radio parameters and node activity is essential for effective

transmission, optimal route calculation and QoS support. To achieve optimum end to end

transmission it is necessary to take into account following information: topology change, link

characteristics, node activity, and node resources. This information shall be provided by the Simple

Network Management Protocol and the Related Management Bases (MIB).

• Tasks

- Theoretical research of the SNMP (Sample Network Management Protocol).

- Adding and modify SNMP-elements in click modular router.

• References

- Net-SNMP: http://www.net-snmp.org/

- SNMP/ click: https://github.com/kohler/click-packages

Focus theory / programming , 2 students

http://www.net-snmp.org/



http://www.nsnam.org/

Implementation of an SNMP-Agent using NS3




Prof. Jochen Seitz

M.Sc. Aymen Al-Ani [email protected]

• Description:

Management applications in wireless network include network monitoring, configuration and

control of network and node resources. Resource management plays the major role in QoS

provisioning and efficient utilization of network resources. Therefore the Simple Network

Management Protocol shall be utilited.

• Tasks

- Theoretical research of the SNMP (Sample Network Management Protocol).

- Simulation and validation of SNMP protocol using NS3.

• References

- NS3: http://www.nsnam.org/

- Net-SNMP: http://www.net-snmp.org/

• Focus theory / programming , 1 students






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Research Assistant:

Prof. Jochen Seitz

Mais Hasan

• Description:

File sharing refers to directly sharing files between users of the Internet by using a file-sharing

network as well as a special file-sharing software. File sharing belongs to the application area of

P2P networking and in the field of distributed databases.

• Tasks

– Theoretical research (Protocols, concepts and problems of file sharing in P2P networks).

– State of the art.

– Research of the file sharing application which is provided by the PeerfactSim.KOM - P2P

Simulator.

– Modification of this file sharing application to be runnable based on the CAN Algorithm which

is supported by the same simulator.

• References

D. C. W. Verma, “Legitimate Applications of Peer-To-Peer Networks”, IBM T.J.Watson Research Center, 2004, Canada, ISBN 0-471-

46369-8.

R. Steinmetz, K. Wehrle. Peer-to-Peer System and Applications. Springer-Verlag Berlin Heidelberg 2005, Germany, ISBN 978-3-540-

29192-3

http://peerfact.kom.e-technik.tu-darmstadt.de

• Focus

1 students theory / programming / hardware / measurements / protocols

File Sharing Application in P2P Network

http://peerfact.kom.e-technik.tu-darmstadt.de/







Research Assistant:

Prof. Jochen Seitz

Mais Hasan

• Description:

SCIBE is a generic, scalable and efficient group communication and event notification system. It

provides application level multicast and anycast and supports highly dynamic groups. It is built on

top of the P2P Algorithm Pastry and utilizes its properties.

• Tasks

– Theoretical research of SCRIBE (Concept and Protocol).

– Research of the Pastry simulation which is provided by the PeerfactSim.KOM - P2P

Simulator and of the possibility to build the SCRIBE application on the top of it.

– Implementation and test of the SCRIBE application in Java.

– Evaluation of the performance of the implemented SCRIBE application.

• References

M. Castro, P. Druschel, A. Kermarrec, A. Rowstron, “Scribe: A large-scale and decentralized application-level multicast infrastructure”,

Selected Areas in Communications, IEEE Journal, Vol. 20, Issue. 8, 2002, p. 1489 - 1499, ISSN 0733-8716.

http://peerfact.kom.e-technik.tu-darmstadt.de

https://sites.google.com/site/peerfactsimkom/news

https://trac.freepastry.org/wiki/tut_scribe

• Focus

1 students theory / programming / hardware / measurements / protocols

Implementation of SCRIBE application in

Peerfactsim Simulator






https://sites.google.com/site/peerfactsimkom/news

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Prof. Jochen Seitz

M.Sc. Markus Hager [email protected]

• Description: The information exchange between cars using a car to car (C2C) networks, also called

vehicular ad hoc network (VANET), is the main component of the future intelligent transport systems

(ITS). Many effort has been spend on strategies how the information exchange has to be organized to

reduce the amount of messages on the one side and to increase the information dissemination on the

other side. This led to various broadcast protocols. The task of this project is to provide an overview of

existing protocols and a theoretical discussion of the these broadcast schemes. The main part of the

project is to implement one protocol using the following usual software tools: OMNeT++ (network

simulator), Veins (http://veins.car2x.org/) and SUMO (http://sumo.sourceforge.net/)

The project extends the results already done in a bachelor thesis (in German!)

Good C++ programming skills are recommended!

• Tasks: - Theoretical comparison of different VANET broadcast protocols

- Implementation and performance evaluation of one broadcast protocol

• References: - Panichpapiboon, S.; Pattara-Atikom, W., "A Review of Information Dissemination Protocols for Vehicular Ad Hoc

Networks," Communications Surveys & Tutorials, IEEE , vol.14, no.3, pp.784,798, Third Quarter 2012

• Focus theory / programming / hardware / measurements / protocols 1 student

Implementation of a C2C

Broadcast Protocol

http://veins.car2x.org/

http://sumo.sourceforge.net/

• Description: More and more applications benefit from multicast dissemination. The significance of delay tolerant networks

(DTN) is also growing. The aim of this topic is to investigate useful multicast applications for DTNs based on

mobile ad hoc network (MANETs).

• Tasks – Search for useable approaches

– Compare the found solutions (theoretical).

– Implement and simulate a chosen solution in ns3

• References – IEEE Xplore.

– google

Focus 1 student theory/programming


Supervisor:

Prof. Jochen Seitz

Dipl.-Inf. (FH) Peggy Begerow

Multicast Communication in Delay Tolerant Networks

(DTN)

15.08.2013

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• Description: In order to support multicast applications appropriate multicast routing is needed. This is also true for delay

tolerant networks (DTN). The aim of this topic is to analyse different approaches with focus of delay tolerant

networks in mobile ad hoc network (MANETs). Show challenges for multicast routing and how these can be

solved. List and compare the existing approaches. Consider particularly multicast routing in delay tolerant

mobile ad hoc networks.

• Tasks – Search for useable approaches

– Compare the found solutions (theoretical).

– Implement a chosen solution in ns3 and simulate one multicast routing protocol.

• References – IEEE Xplore.

– google

Focus 1 student theory/programming


Supervisor:

Prof. Jochen Seitz

Dipl.-Inf. (FH) Peggy Begerow

Multicast Routing in Delay Tolerant Networks (DTN)

15.08.2013

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• Description: A In order to deliver messages within a delay tolerant network (DTN) several routing approaches exist. One possibility is the usage of so called ferries. Ferries are special nodes with extended storgage, that move between other nodes to ensure the delivery of messages. The goal of this project is a comparison of existing ferry routing approaches in delay tolerant networks with focus on their usability in disaster scenarios. The best suited protocols will be implemented in the ONE simulatior. Conclusions from simulation results should lead to suggestions for possible protocol enhancements.

• Tasks

– Literature survey on existing ferry-based routing protocols for DTNs

– Implementation and Simulation of two chosen protocols using ONE

– Concept for further enhancements

References [1] Anastasi, G.; Conti, M.; Passarella, A. & Pelusi, L. Mobile-relay forwarding in opportunistic networks. 2008. [2] Keränen, A.; Ott, Jö. & Kärkkäinen, T. The ONE simulator for DTN protocol evaluation. 2009. [3] Zhao, W.; Ammar, M. & Zegura, E. A message ferrying approach for data delivery in sparse mobile ad hoc networks. 2004.

Focus

1 student theory / programming / hardware / measurements


Supervisor:

Prof. Jochen Seitz

M. Sc. Silvia Krug

Ferry-Based Routing in Delay-Tolerant Networks

15.08.2013

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• Description: A geocast message is send to all nodes within a specified geographic area. This is especially important for disaster scenarios when messages effect one location only. One example could be the notification about a discovered gas leakage. The goal of this project is a comparison of existing geocast routing approaches in delay tolerant networks with focus on their usability in disaster scenarios. The best suited protocol will be implemented and simulated in ns3. Conclusions from simulation results should lead to suggestions for possible protocol enhancements.

• Tasks – Literature survey on existing geocast routing protocols for DTNs

– Implementation and Simulation of chosen protocol using ns3

– Concept for further enhancements

• References [1] S. Allal and S. Boudjit. "Geocast Routing Protocols for VANETs: Survey and Guidelines." Innovative Mobile and Internet

Services in Ubiquitous Computing (IMIS), 2012 Sixth International Conference on. IEEE, 2012. [2] Network Simulator 3, http://www.nsnam.org/

Focus 2 students theory / programming / hardware / measurements


Supervisor:

Prof. Jochen Seitz

M. Sc. Silvia Krug

Geocast Routing in Delay Tolerant Networks

15.08.2013

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Head: Prof. Dr.-Ing. Martin Haardt

Lab: Communications Research Laboratory

15.08.2013

• Description:

Multi-user MIMO precoding techniques are key solutions to the future cellular network. Among them leakage

based precoding (SLR) and regularized block diagonalization (RBD) algorithm have many similarities.

• Tasks

– Understanding RBD and SLR

– Implement and compare the algorithms under

various MIMO system setups

– Analytical analysis or robust design for the

two algorithms

• References [1] M. Sadek, A. Tarighat and A. H. Sayed, “A Leakage-Based Precoding Scheme for Downlink Multi-User MIMO Channels”, IEEE Trans.

Wireless Communications, Vol. 6, No. 5, May. 2007

[2] W. Xu and X. Dong, “Leakage Based Precoding for Multi-User MIMO-OFDM Systems”, IEEE Trans. Wireless Communications, Vol. 10,

No. 8, Aug. 2011.

[3] V. Stankovic and M. Haardt, “Generalized Design of Multi-User MIMO Precoding Matrices”, IEEE Trans. Wireless Communications, vol.

7, Mar. 2008.

• Focus

1 student, theory / programming / hardware / measurements / protocols


Supervisor: E-Mail:

Prof. Dr. –Ing. Martin Haardt

M. Sc. Jianshu Zhang {jianshu.zhang}@tu-ilmenau.de

A Comprehensive Study on Leakage Based Precoding (SLR)

and Regularized Block Diagonalization (RBD)




Research Adviser: E-Mail:



• Description:

MIMO techniques are becoming mature, and incorporated into emerging mobile broadband standard like

LTE. To further exploit the potential of MIMO techniques in 5G systems, massive MIMO becomes one of the

new research fields in wireless communications. Moreover, 3D bemfoming which takes the advantage of the

vertical antenna pattern is a popular task in current LTE standard.

• Tasks

– Literature study of massive MIMO techniques and 3D beamforming techniques

– Demonstrate the advantage of 3D beamforming

– Study the remaining issues in the current work

• References

[1] A. Adhikary, J. Nam, J.-Y. Ahn, and G. Caire, “Joint Spatial Division and Multiplexing – The Large-Scale Array Regime", IEEE Trans.

Information theory, 2013.

[2] N. Gresset, H. Halbauer, J. Koppenborg, W. Zirwas, and H. Khanfir, “Interference-avoidance techniques: Improving ubiquitous user

experience”, IEEE vehicular technology magazine, vol. 7, no. 4, 2012.

[3] H. Q. Ngo, E. G. Larsson, and T. L. Marzetta, “Energy and Spectral Efficiency of Very Large Multiuser MIMO Systems“, IEEE Trans.

Commun., submitted.

• Focus

1 student, theory / programming / hardware / measurements / protocols

3D Beamforming for 5G Cellular Networks



Research Adviser: E-Mail:



• Description:

In recent years we have witnessed a remarkable increase in the amount of data that is being collected due to

the rapid evolvement of the hardware industry. As a consequence, we live in a big data world where

information is accumulating at an exponential rate and often the real problem has shifted from collecting

enough data to dealing with its impetuous growth. It is the time to develop novel data models and efficient

algorithms to handle the massive data.

• Tasks

– Literature study of tensor based big data processing, including data compression and distributed

implementation \ conventional tools such as conjoint analysis

– Implementing, analyzing and extending the existing techniques.

• References

[1] N. D. Sidiropoulos and A. Kyrillidis, “Multi-way compressed sensing for sparse low-rank tensors", IEEE Signal Processing

Letter, Nov 2012.

[2] E. E. Papalexakis, C. Faloutsos, and N. D. Sidiropoulos, “Parcube: Sparse parallelizable tensor decompositions”, in Proc. European

Conf. Machine Learning and Principles and Practice of knowledge discovery in databases, Sep. 2012.

[3] E. Tsakonas, J. Jalden, N. D. Sidiropoulos, B. Ottersten, “Maximum likelihood based sparse and distributed conjoint analysis“, in Proc.

Statistical signal processing workshop (SSP), 2012.

• Focus

2 students, theory / programming / hardware / measurements / protocols

Algorithms and Tools for Big Data Application

• Description: The system employs limited feedback strategy to provide the channel state information (CSI) to the base station. Two quantization schemes are studied. One performs vector quantization scheme to quantize the channel directly. Another exploits the structure of the coordinated beamforming to avoid full channel quantization.

• Tasks – Literature study on coordinated beamforming and quantization schemes.

– Investigate the sum rate performance with quantized CSI.

– Evaluate the performance comparison in terms of achieved sum rate and overhead.

• References [1] C.-B. Chae, D. Marzzarese, N. Jindal and R. W. Heath Jr. , “Coordinated beamforming with limited feedback in MIMO

broadcast channel”, IEEE Journal on Selected Areas in Communications, vol. 26, pp. 1505-1515, 2008. [2] N. Jindal, “MIMO broadcast channels with finite-rate feedback”, IEEE Trans. Inf. Theory, vol.52, no.11, pp 5045- 5059, Nov. 2006.



Supervisor:

Prof. Martin Haardt

M.Sc. Bin Song, Dr. Peng Li

Coordinated beamforming for two-users MIMO

broadcast channels with limited feedback

15.08.2013

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• Description: A coordinated beamforming algorithm (FlexCoBF) is studied in the presence of a time-variant correlated multi-user MIMO channels.

• Tasks – Literature study on coordinated beamforming (FlexCoBF) and basic concepts in Ilmprop.

– Investigate the achievable sum rate in realistic Ilmprop scenario.

– Evaluate the effect of the long-term CSI on the achievable sum rate.

• References [1] B. Song, F. Roemer, and M. Haardt, “Flexible coordinated beamforming (FlexCoBF) algorithm for the downlink of multi-user

MIMO systems”, in Proc. ITG Workshop on Smart Antennas (WSA’10), (Bremen, Germany), pp. 114-118, Feb. 2010. [2] B. Song, M. Haardt, T. F. Maciel and A. Klein, “Multi-user MIMO downlink precoding for time-variant correlated channels”,

in Proc. ITG Workshop on Smart Antennas (WSA’09), (Berlin, Germany), Feb. 2009.



Supervisor:

Prof. Martin Haardt

M.Sc. Bin Song, Dr. Peng Li

Coordinated Beamforming (FlexCoBF) in time-variant

correlated broadcast channels

15.08.2013

• Description: Endowed with the potential of combining the benefits of both MIMO processing and the space-division multiple access (SDMA), multi-user MIMO downlink has received great research attention. Among various linear precoding algorithms designed for multi-user MIMO downlink transmissions, linear precoding-based geometric mean decomposition (LP-GMD) is able to mitigate the multi-user interference and to allow an effective equal modulation and coding scheme (MCS) implementation on all the spatial streams of each user. Yet the performance of LP-GMD in critical scenarios (e.g., with bad-conditioned channels) has not been investigated.

• Tasks – Study linear precoding techniques developed for multi-user MIMO

downlink with SDMA

– Investigate the performances of LP-GMD in different channel conditions

– Work on the solutions of possible performance degradation of LP-GMD in a certain channel condition

• References [1] Q. H. Spencer, A. L. Swindlehurst, and M. Haardt, “Zero-forcing methods for downlink spatial multiplexing in multi-user

MIMO channels,'' IEEE Transactions on Signal Processing, vol. 52, pp. 461-471, Feb. 2004. [2] Y. Cheng, S. Li, J. Zhang, F. Roemer, M. Haardt, Y. Zhou, and M. Dong, “Linear precoding-based geometric mean

decomposition (LP-GMD) for multi-user MIMO systems,'' in Proc. ISWCS 2012, Aug. 2012.



Supervisor:

Prof. Martin Haardt

M.Sc. Yao Cheng, Dr. Peng Li

On the Performance of Linear Precoding-based Geometric Mean

Decomposition (LP-GMD) in Critical Scenarios

15.08.2013

• Description: Filter bank-based multicarrier (FBMC) systems have the potential of enabling an effective utilization of the available fragmented spectrum in heterogeneous radio environments. Until recently new space diversity and multiplexing algorithms have been developed to exploit the particularities of FBMC.

• Tasks – Study the concept of FBMC and get to know its superiority over

orthogonal frequency-division multiplexing (OFDM)

– Investigate the state-of-the-art MIMO techniques developed for FBMC systems via a thorough literature study as well as extensive MATLAB simulations

– Work on extensions of the current algorithms

• References [1] M. El Tabach, J. Javaudin, and M. Helard, “Spatial Data Multiplexing Over OFDM/OQAM Modulations” in Proc. IEEE

International Conference on Communications, June 2007. [2] M. Renfors, T. Ihalainen, and T. H. Stitz, “A block-alamouti scheme for filter bank based multicarrier transmission,” in

Proc. European Wireless Conference (EW), April 2010. [3] C. Lélé and D. Le Ruyet, "Decoding schemes for FBMC with single delay STTC", EURASIP Journal on Advances in Signal Processing, vol. 2010, no. 6, Jan. 2010.



Supervisor:

Prof. Martin Haardt

M.Sc. Yao Cheng, Dr. Peng Li

Survey on MIMO Techniques for

Filter Bank-based Multicarrier (FBMC) Systems

15.08.2013

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• Description: Widely linear processing is able to fully exploit the second-order statistics of the non-circular signals and

improve the estimation performance [1]. This is generally achieved by dealing with an augmented vector,

i.e., concatenation of the original signal and its complex conjugate (Fig. ). Blind parameter estimation

technique that do not require the training symbols are quite promising. The goal of this project is to develop

widely linear blind channel estimation algorithms.

• Tasks • Understand widely linear processing [1]

• Study the blind channel estimation method in [2]

• Develop adaptive widely linear blind estimation algorithms

• References [1] B. Picinbono and P. Chevalier, “Widely linear estimation with complex data,” IEEE Transactions on Signal Processing, vol.

43, no. 8, pp. 2030–2033, 1995.

[2] X. G. Doukopoulos and G. V. Moustakides, “Adaptive power techniques for blind channel estimation in CDMA systems,”

IEEE Trans. Signal Process., vol. 53, no. 3, pp. 2330–2334, Mar. 2005



Supervisor:

Prof. Martin Haardt

Dr.-Ing Nuan Song, M.Sc. Jens Steinwandt

Widely Linear Blind Channel Estimation using Adaptive

Power Techniques

15.08.2013

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• Description: A multiuser multicell MIMO network is studied, where user symbol reliability estimation is investigated in a system with coordinated base stations.

• Tasks

– Literature review on multiuser multicellular coordinated MIMO networks

– Extension of current algorithms, investigation of user scheduling

– Novel reliability estimation and refined detection designs (optional)

• References [1] P. Li, R. C. de Lamare and R. Fa, "Multiple Feedback Successive Interference Cancellation Detection for

Multiuser MIMO Systems", IEEE Transactions on Wireless Communications, vol. 10, no. 8, pp. 2434 - 2439, August 2011.

[2] D. Gesbert, S. Hanly, H. Huang, S. Shamai, O. Simeone, Y. Wei, "Multi-Cell MIMO Cooperative Networks: A New Look at Interference," IEEE Journal on Selected Areas in Communications, , vol.28, no.9, pp.1380,1408, December 2010.

1 student theory / programming / hardware / measurements


Supervisor:

Prof. Martin Haardt

Dr. Peng Li

Data reliability estimation in Multiuser Multicell MIMO

networks

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_ms_csp

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Head: Prof. Dr. rer. nat. habil. Matthias Hein

RF and Microwave Research Laboratory

• Description

The efficiency of novel piezoelectric RF-MEMS resonators for stable and programmable oscillator circuits is

determined by the quality factor Q and the electromechanical coupling factor κ. These quantities themselves

result from the geometrical dimensions and mechanical and electrical properties of the resonator materials. This

project aims at elementary design contributions to RF-MEMS oscillators in the framework of an interdisciplinary

DFG research unit (Forschergruppe).

• Tasks

Analytical approach to estimate Q-factor and electromechanical coupling factorκ as a function of geometric and material parameters

– Numerical simulation of electrical transmission behaviour

– Identification of useful geometries providing high Q and high κ

– Simple FEM Simulations of the resonator structure

• References (basic literature) 1. A. Lenk, R. G. Ballas, R. Werthschützky, and G. Pfeifer, Electromechanical systems

in microtechnology and mechatronics: electrical, mechanical and acoustic networks,

their interactions and applications, Berlin: Springer, 2011.

Focus

1 student theory / programming / simulation / hardware / measurements / protocols

Page 26

Piezoelectric longitudinal-mode RF-MEMS resonators


Research Assistant:

Prof. Matthias Hein

MSc. Dmitry Podoskin [email protected]

230μm

August 2013

▪ Description

An oscillator produces a stable output signal with a well-defined frequency spectrum, without any input signal;

such circuits are widely used for time-keeping, signal mixing and other applications. Spectral purity and phase

noise of the output signal, as well as total power consumption, are considered as the important figures-of-merit.

In the framework of an interdisciplinary DFG research unit (Forschergruppe), this project aims at elementary

contributions to the development of integrated RF oscillator circuits based on MEMS resonators in replacement

for state-of-the-art quartz crystal or surface acoustic wave resonator based solutions.

▪ Tasks

Improvement of the existing oscillator circuit

Analytical and simulative approaches to analysis and design

– Numerical simulation of the oscillator integrated circuit (IC) using powerful Cadence Virtuoso software

– Evaluating the output signal quality parameters (magnitude, phase jitter etc.)

▪ References (basic literature) 1. Willy Sansen, "Design of crystal oscillators".

2. R. Rhea, "Discrete oscillator design", Norwood, Mass.: Artech House, 2010.

Focus


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MEMS-based RF integrated oscillator circuit Responsible Professor:

Research Assistant:

Prof. Matthias Hein

MSc. Dmitry Podoskin [email protected]

• Description

An in practice commonly used transmission line (TL) consists of a series inductor and a shunt capacitor and is

called right-handed (RH) TL for its E- and H-field form a right-handed triad with the wave vector. On the

contrary, a left-handed (LH) TL consist of a series capacitor and a shunt inductor. It does not exist as a natural

material but as a lumped elements representation.

The practicable combination of both LH and RH structure is the composite-right-left-handed TL that has a

partly negative propagation constant. The idea of a CRLH TL can be combined with the concept of replacing

reactances with a tuneable transistor circuit to achieve a tuneable filter. A trade-off between the tuning range

and reasonable element values must be taken into consideration.

• Tasks

– Literature study of metamaterials and existing filter structures

– Simulation of exemplary MTM filter for a given frequency range

– Implementation of vendor transistor model to achieve tuneability

– (Study of wave propagation with MOMENTUM on a PCB)

• References 1. Caloz, C., Itoh, T.: “Electromagnetic Materials – Transmission Line Theory and Microwave Applications“, Wiley Interscience Publication, 2006

2. Palandöken, M.: “Metamaterial-Based Compact Filter Design“, Dr. X.-Y. Jiang (Ed.), InTech, 2011

Available from: http://www.intechopen.com/books/metamaterial/metamaterial-based-compact-filter-design

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www.tu-ilmenau.de/ei_ms_csp Page 28


Research Assistant: Prof. Matthias Hein

MSc. Stefanie Kühn [email protected]

Active Tuneable Metamaterial Filter

August 2013

www.tu-ilmenau.de/ei_ms_csp Page 29


Research Assistant: Prof. Matthias Hein

MSc. Maysam Ibraheam [email protected]

• Description

Compact antenna arrays suffer from mutual coupling between their elements. Mutual coupling reduces the

eigen-efficiency of the antenna array, which results in fewer effective degrees-of-freedom considering pattern

beamforming. Tilting elements of the array has a good influence on the eigen-efficiency of the array. Our goal

is to study this influence using a numerical approach. The results will be useful to improve the geometry of

compact antenna arrays.

• Tasks

– Design a planar antenna

array of 5 rectangular patches (CST)

– Calculating the radiation matrix of an antenna array with and without Ohmic losses (CST, MATLAB)

– Understanding concepts of antenna array, mutual coupling, beamforming and eigen-mode analysis

– Studying how tilting the patches affects the eigen-efficiencies of the array for different tilting angles (CST,

MATLAB)

• References 1. Volmer, C., Weber, J., Stephan, R., Blau, K., Hein, M.A., "An Eigen-Analysis of Compact Antenna Arrays and Its Application to Port Decoupling," Antennas

and Propagation, IEEE Transactions on , Feb. 2008

2. Irteza, S., Murtaza, N., Caizzone, S., Stephan, R., Hein, M.A., "Compact planar L-band antenna arrays with optimal diversity performance," IEEE-APWC

Turin, 2011.

Focus

1 student (RP) theory / programming / simulation / hardware / measurements / protocols

Efficiency of Patch Antenna Arrays for Tilted Patches

August 2013




Head: Prof. Dr.-Ing. habil. Reiner S. Thomä

Electronic Measurement Research Lab

15.08.2013 Page 30

• Description: Two-dimensional Root-MUSIC is applicable in several scenarios. However, we need high dimensionality to approximate real antenna arrays (e.g. via Effective Aperture Distribution Function). Hence, efficient implementation of 2D Root-MUSIC (called PRIME) is needed.

• Tasks – Literature study on PRIME

– Literature study on analytical determinant computation of polynomial-valued matrices (e.g. using LU decomposition)

– Derivation of algorithms

– Comparison of algorithms using randomly generated polynomials

• References [1] Hatke, G.F. and Forsythe, K.W., "A class of polynomial rooting algorithms for joint azimuth/elevation estimation using

multidimensional arrays," Signals, Systems and Computers, 1994. 1994 Conference Record of the Twenty-Eighth Asilomar Conference on , vol.1, no., pp.694,699 vol.1, 31 Oct-2 Nov 1994

[2] Wenqin Zhou and David J. Jeffrey, "Fraction-free matrix factors: new forms for LU and QR factors“, Frontier of Computer Science in China, March 2008, vol 2, pp 67-80



Supervisor:

Prof. Reiner Thomä

Dominik Schulz

Efficient Implementation of

PRIME algorithm (2D Root-MUSIC)

15.08.2013 Page 31

• Description: Position estimation is done in 3D space using the MUSIC algorithm for direction finding. The accuracy should be improved by exploiting assumptions about the movement (e.g. locally linear/elliptical) of the observer or the transmitter.

• Tasks – Literature study on combined direction finding & tracking techniques

– Derive suitable algorithms that make use of (local) movement assumptions

– Verification by implementation of some scenarios (Matlab/Octave)

• References [1] Yifeng Zhou; Yip, P.C.; Leung, H., "Tracking the direction-of-arrival of multiple moving targets by passive arrays: algorithm,“

Signal Processing, IEEE Transactions on , vol.47, no.10, pp.2655,2666, Oct 1999



Supervisor:

Prof. Reiner Thomä

Dominik Schulz

MUSIC-based Position Estimation by

Exploiting Movement of Emitter or Receiver

15.08.2013 Page 32

• Description: Several physical-layer data encryption protocols based on the phenomenon of wireless channel reciprocity are studied. These protocols are to be implemented in MATLAB and evaluated for car-to-car communication channel based on synthetic and measurement data.

• Tasks – Literature study on state-of-the-art RCKG schemes and the criteria

of their evaluation;

– Implementation of the algorithms in MATLAB and their evaluation on the measurement data;

– Development of the improvements for the state-of-the-art RCKG schemes (optional)

• References

[1] A. Ambekar, N. Kuruvatti, and H. D. Schotten, “Improved Method of Secret Key Generation Based on Variations in Wireless Channel”, IWSSIP, 11-13 Apr. 2012.

[2] C. Ye, S. Mathur, A. Reznik et al., “Information-Theoretically Secret Key Generation for Fading Wireless Channels”, IEEE Transactions on Information Forensics and Security, Vol. 5, Issue 2, 2010.

• Focus 1-2 students theory / programming / hardware / measurements


Supervisor:

Prof. Reiner S. Thomä

Oleksii Skoblikov

Reciprocal Channel Key Generation for Car-to-car

Communication Systems

15.08.2013 Page 33

Department of Computer Science and Automation

Institute of Computer Engineering

Head: Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel

Integrated Communication Systems Group

15.08.2013 Page 34

• Description: Underwater Networks become very interesting for research in the last time.

• Tasks – Literature study on robust algorithms for underwater localization

– Selection of two approaches for the comparison

– Simulation of the selected approaches

– Extension of the approaches with the improvement scheme

designed by Mr. Artemenko (optional)

– Simulation of the improved scheme (optional)

• References [1] Diba Mirza, Curt Schurgers, and Ryan Kastner. 2012. Real-time collaborative tracking for underwater networked systems.

In Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems (WUWNet '12). ACM [2] Diba Mirza , Curt Schurgers, Collaborative tracking in mobile underwater networks, Proceedings of the Fourth ACM

International Workshop on UnderWater Networks, p.1-8, November 03-03, 2009, Berkeley, California [3] Artemenko, O.; Mitschele-Thiel, A.; Schorcht, G., "Improvement of localization results in wireless networks using estimation

of distances between unknown nodes: Simulation and real testbed evaluation," Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on , vol., no., pp.693,697, 9-12 Sept. 2012



Supervisor:

Prof. Andreas Mitschele-Thiel

Oleksandr Artemenko

Investigation and Comparison of State-of-the-Art

Approaches in Underwater Localization

15.08.2013 Page 35

• Description: In case of redundant reference data (anchors) available for the localization, smart selection strategy can be applied to provide more accurate localization results. The main idea of this project is to compare different approaches using measurement data collected from UAV missions.

• Tasks – Literature study on approaches for anchor selection

– Selection of two approaches for the implementation

– Conduct experiments using UAV and netbooks (supported by supervisor)

– Comparison to the results obtained previously by Mr. Artemenko

– Extension of algorithms (optional)

• References [1] Artemenko, O.; Simon, T.; Mitschele-Thiel, A.; Schulz, D.; Ta, R.S., "Comparison of Anchor Selection algorithms for

improvement of position estimation during the Wi-Fi localization process in disaster scenario," Local Computer Networks (LCN), 2012 IEEE 37th Conference on , vol., no., pp.44,49, 22-25 Oct. 2012

• Focus 1-2 students theory / programming / hardware / measurements


Supervisor:

Prof. Andreas Mitschele-Thiel

Oleksandr Artemenko

Robust Reference Selection Algorithms for Localization

in Wireless Networks

15.08.2013 Page 36

nuso2344

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already assigned

15.08.2013 www.tu-

ilmenau.de/ei

_ms_csp

Page 37

Computer Science and Automation Faculty

Institute for Automation and Systems Engineering

Head: Prof. Dr.-Ing. Johann Reger

Control Engineering Group

14.08.2013 www.tu-ilmenau.de/ei_ms_cspPage 1

Responsible Professor:E-Mail:

Dr. Allahyar Montazeri [email protected]

• Description: In many practical and real-world acoustic environment, the received acoustic signals from different sources at any point is a combination of delayed and attenuated form of all actual signals and their reverberations. Reverbrations usually results from reflections from walls and other obstacles in the environment. Accurate identification and localization of acoustic sources in such conditions is a fundamental problem in sound field control. Generally speaking there are three different categories of sound source separation methods in the literature which are based on microphone array techniques: Beamforming, Blind source separation, and microphone array processing techniques utilizing DOA estimation [1, 2, 3]. A variety of applications can be mentioned for the microphone array techniques used for sound source separation, however in what concerned in this research we are mainly intereseted in high accuracy sound field reconstruction and noise source separations [4].

• Tasks- Literature survey on different algorithms used for each of the above mentioned microphone array techniques.

- Investigation on the performance of the different algorithms especially in reverberant rooms and the proposed solutions.

- Investigation on the applications of sound source separation in sound field reproduction systems.

• References[1] Y. Huanga, J. Benestyb, J. Chen, “Identification of acoustic MIMO systems: Challenges and opportunities,” Signal Processing, vol. 86, pp. 1278–1295, 2006.[2] I. Jafari, R. Togneri, S. Nordholm, “Review of Multi-Channel Source Separation in Realistic Environments,” In Proceedings of SST2010, Melbourne, Australia, pp. 201-204, December 2010.[3] F. Ribeiro, D. Ba, C. Zhang, D. Florencio, “Turning Enemies into Friends: Using Reflections to Improve Sound Source Location,” IEEE International Conference on Multimedia and Expo (ICME), pp. 731-736, 2010 [4] M. R. Bai, Jeong-Guon Ih, J. Benesty, Acoustic Array System: Theory, Implementation, and Application. Wiley and Sons, 2013.

• Focus theory / programming / hardware / measurements / protocols, 1 student

Microphone Array Techniques for Sound Source Separation

13.08.2013 www.tu-ilmenau.de/ei_ms_cspPage 1

Responsible Professor:E-Mail:

Dr. Allahyar Montazeri [email protected]

• Description:

A basic operation in multichannel acoustic signal processing is massive convolution. It consists of carrying out simultaneously many convolutions of different audio channels. In audio applications this allows achieving more precise acoustic effects like 3D spatial sound. Massive convolution requires high computing capacity. GPUs offer the possibility of parallelizing these operations. This allows us to obtain the processing result in much shorter time and to free up CPU resources. One important aspect lies in the possibility of overlapping the transferof data from CPU to GPU and vice versa with the computation, in order to carry out real-time applications.

• Tasks- Literature survey on state-of-the-art of multichannel audio signal processing tasks can be done with GPU

- Investigation on the required platform (hardware and software) necessary for programming with GPU

- Providing a simple sound reproduction simulation environment by programming GPU in MATLAB environment (using Parallel ProcessingToolbox)

• References[1] Yiteng (Arden) Huang, Jingdong Chen, and Jacob Benesty, “Immersive Audio Scheme,” IEEE Signal Processing Magazine, vol. 20, 2011. [2] Jose A. Belloch, Alberto Gonzalez, Francisco J. Martinez, Antonio M. Vidal, “Real-time massive convolution for audio applications on GPU,” Journal of Supercomputing, ISSN: 0920-8542 , 1 - 9, 2011.[3] Jose A. Belloch, Alberto Gonzalez, Antonio M. Vidal, Maximo Cobos, “Real-Time Sound Source Localization on Graphics Processing Units,” International Conference on Computational Science 2013 , Barcelona, Spain, 2013

[4] CUDA Toolkit 3.2: http://developer.nvidia.com/object/cuda_3_1_downloads.html

[5] Wen-Mei W. Hwu, GPU Computing GEM Emeral Edition, Elsevier 2011.

• Focus theory / programming / hardware / measurements / protocols, 1 student

Application of Graphical Process Unit (GPU) in Sound Reproduction

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