topics for the mscsp advanced research projects · - generate a file for mobility traces based on...

Topics for the MSCSP

14.07.2014

Advanced Research Projects

Summer Semester 2015

Selection of topics and submission of topic sheets until

April 16, 2015.

15.08.2013

Department of Electrical Engineering and Information Technology

Institute for Information Technology

Division of Communication Networks

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

15.08.2013

Performance Analysis of QoS Over VANETs

09.02.2015 www.tu-ilmenau.de/ei_ms_csp Page 1

Responsible Professor: Research Advisor:

Prof. Jochen Seitz M.Sc. Aymen Al-Ani [email protected]

• Description Recently, VANETs (Vehicular Ad Hoc Networks) and their applications have become increasingly popular. A VANET consists of vehicles acting as wireless mobile devices. These are distributed, dynamic, and do not use any predefined infrastructure or centralized administration.

• Tasks - Theoretical research of VANET routing protocols. - Generate a file for mobility traces based on NS3 highway mobility model or SUMO. - Compare two VANET routing protocols with regard to QoS based on simulation runs. • References - Simulate using NS3: http://www.nsnam.org/ - NS3 Highway mobility: https://code.google.com/p/ns-3-highway-mobility/ - SUMO : http://www.dlr.de/ts/en/desktopdefault.aspx/tabid-9883/16931_read-41000/ • Focus 1 student theory / programming / hardware / simulation / measurements

http://www.nsnam.org/

https://code.google.com/p/ns-3-highway-mobility/

http://www.dlr.de/ts/en/desktopdefault.aspx/tabid-9883/16931_read-41000/

Description Communication in Intelligent Transport Systems known as Internet of Vehicles (IoV) demands a different perspective in the decentralized routing process which are not offered currently by traditional routing techniques. This research is focused in the problem of routing, in the context of Internet of Vehicles (IoV), using Social Networking Strategies specially in the Neighbor Discovery, Situational Awareness and Service Recovery Management components with emphasis in the Self-Organization of the routing process. The goal of this project is to carry out a comparison of Social Strategies and selection of the two best routing solutions. For the simulations of the selected routing solutions will be used SUMO and OMNeT++. The conclusions of this project should propose improvements in the routing process.

Tasks - Literature survey of Self-Organized IoV routing approaches based on Social-Driven Strategies

- Theoretical comparison of strategies and selection of the best routing solutions

- Implementation and simulative comparison of the two best solutions in SUMO and OMNeT++.

- Conclusions and scheme of improvements

References [1] D. Duan, L. Yang, Y. Cao, J. Wei, X. Cheng. Self-organizing networks: From bio-inspired to social-driven. 2014. [2] L. Atzori, A. Iera, G. Morabito. From “Smart Objects” to “Social Objects”: The Next Evolutionary Step of the Internet of Things. 2014. [3] M. Gerla, E. Lee, G Pau, and U. Lee. Internet of Vehicles: From Intelligent Grid to Autonomous Cars and Vehicular Clouds.2014

Focus 2 student theory / programming / hardware / measurements

Responsible Professor: Supervisor:

Prof. Jochen Seitz M.Sc. Yuri Cotrado S.

Situation-aware Routing in IoV scenarios based on Social-Driven Strategies

09.02.2015 Page 1

• Description: Collection and exchange of information related to network resources and users experience between entities in heterogeneous environments play a major role in handover decision.

• Tasks – Literature study on network management protocols. – Hands on the OmneT++ network simulator. – Implementing the proposed approach in the simulator.

• References [1] Omnet++, http://www.omnetpp.org [2] A.Vulpe, S.Obreja, O.Fratu, „A study of mobility management using IEEE 802.21“, IEEE (ISETC), 2010. [3] J. Kantorovitch, P. Mahonen, „ Case studies and experiments of SNMP in wireless networks”, IEEE workshop on IP

Operations and Management, 2002.

• Focus 1 student theory / programming / hardware / measurements


Prof. Jochen Seitz Atheer Al-Rubaye

Network Information Management in Heterogeneous Environment

09.02.2015 Page 1

http://www.omnetpp.org/

Description: Vehicular Ad-hoc Networks (VANETs) are considers as the first deployed large-scale mobile ad-hoc networks, in which each vehicle is considered as a mobile node. It provides the ability for the vehicles to communicate with each other and exchange information (called Vehicle-To-Vehicle (V2V)). The target of this project is to evaluate the performance of standard MAC protocol in VANETs in terms of collisions, delay and throughput in a realistic scenario.

• Tasks – Literature survey on existing MAC protocols for VANETs

– Implementation and Simulation of standard MAC protocol

– Concept for further enhancements

References [1] Intelligent Transportation Systems Committee, “IEEE Trial-Use Standard for Wireless Access in Vehicular Environments

(WAVE) - Multi-channel Operation,” IEEE, Standard 1609.4-2010, February 2011. [2] LAN/MAN Standards Committee,” Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,

IEEE 802.11p. 2010 Focus

1 student theory / programming / hardware / measurements


Prof. Jochen Seitz M. Sc. Usama Sallakh

Performance evaluation of Vehicular Ad-hoc Networks (VANETs) standard MAC protocol

09.02.2015 Page 1

• Description: Decision algorithms that consider multiple parameters are significant for network selection in heterogeneous networks environment to provide seamless handover.

• Tasks – Literature study on multi-criteria algorithms. – Hands on the OmneT++ network simulator. – Implementing the AHP algorithm as a framework in the simulator.

• References [1] Omnet++, http://www.omnetpp.org [2] S. Fernandes, A. Karmouch, „Vertical Mobility Management Architectures in Wireless Networks: A Comprehensive

Survey and Future Directions“, IEEE COMMUNICATIONS SURVEYS & TUTORIALS, VOL. 14, 2012



Prof. Jochen Seitz Atheer Al-Rubaye

Multi-criteria decision framework for OmneT++

09.02.2015 Page 1

http://www.omnetpp.org/

• Description: Common simulation environments consider 2D propagation only. However, if Mobile Ad Hoc Networks (MANETs) are applied to an outdoor use case, the terrain and other obstacles have an impact on the signal strength and thus the resulting topology. The goal of this project is to implement one approach presented by Filiposka et. al [1] in ns3 and to evaluate the impact on default MANETs with respect to connectivity and routing protocol performance.

• Tasks – Literature survey on 3D propagation models and comparision with [1] – Implementation of the approach in [1] in ns3 – Evaluation of the impact on MANET scenarios

References [1] Filiposka et al.: Terrain Details Effect on Connectivity in Ad hoc Wireless Networks. 2013.

[2] Network Simulator 3 (ns3). www.nsnam.org

Focus 1 student theory / programming / hardware / simulation


Prof. Jochen Seitz M. Sc. Silvia Krug

Evaluation of Terrain Aware 3D Propagation for MANETs

13.02.2015 Page 1

• Description Wireless communication protocols have to adapt to varying environmental conditions due to mobility, shadowing etc. This condition imposes a requirement, during design phase of the protocol, that it must be evaluated against environmental conditions as accurately as possible. This can be achieved by using an appropriate path loss model that reflects these conditions, during simulation. Goal of this project is to implement such a path loss model for hilly terrains. This path loss model then shall be evaluated and compared against existing Two-ray Interference model, using a scenario that simulates ad-hoc networks in hilly terrains. The results should validate the new model.

• Tasks – Literature survey on existing path loss models for hilly terrains. – Implementation of appropriate path loss model in Omnet++ & Veins. – Compare the new model with existing Two-Ray Interference model using Omnet++ & Veins. – Concept to import DTED / SRTM files to simulate real-life scenarios for hilly terrains.

• References [1] Erceg, V.; Greenstein, L.J.; Tjandra, S.Y.; Parkoff, S.R.; Gupta, A.; Kulic, B.; Julius, A.A.; Bianchi, R.: “An Empirically Based Path Loss Model for Wireless Channels in

Suburban Environments”, IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, Vol. 17, No. 7, pp. 1205—1211, July 1999. [2] Lu, J.S.; Han, X.; Bertoni, H.L.: “The Influence of Terrain Scattering on Radio Links in Hilly/Mountainous Regions”, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION,

Vol. 61, No. 3, pp. 1385—1395, March 2013 .

• Focus 2 students theory / programming / simulation


Prof. Jochen Seitz Parag Sewalkar

Implementation of Path Loss Model for Hilly Terrain

13.02.2015 Page 1

• Description Mobile Ad-hoc networks (MANETs) need efficient routing algorithms due to their changing topology. Depending on the mobility situations, the appropriate type of routing protocol (proactive, reactive etc.) must be chosen for the network. Goal of this project is to compare the performance of different MANET routing algorithms under a given scenario. A large-area, sparse-density, multi-hop MANET shall be simulated with reactive & proactive protocols and routing performance shall be evaluated against a given metric.

• Tasks – Literature survey on adaptive and reactive routing protocols. – Design and simulate MANET multi-hop scenarios with different routing protocols (at least three) using Omnet++ & Veins. – Evaluate the performance of simulated routing protocols and make appropriate recommendation.

• References [1] S Taneja, A Kush. “A Survey of routing protocols in mobile ad hoc networks”, International Journal of Innovation, Management and Technology, Vol. 1,

No. 3, August 2010 [2] http://www.omnetpp.org

• Focus 1 student theory / programming / simulation


Prof. Jochen Seitz Parag Sewalkar

Performance Evaluation of Routing Protocols in MANETs

13.02.2015 Page 1

• Description: Delay Tolerant Networks (DTNs) are an approach to deal with intermittent connectivity and are especially useful to bridge partitioned Mobile Ad hoc Networks (MANTEs). Multicast approaches are suitable for group communication. In DTN the challenge is to identify all group members in time. Therefore, multicast protocols have to provide the replication of messages to intended receivers. The goal of this project is to implement and compare 2 existing protocols OS-Multicast and MIDTONE in the Opportunistic Network Simulator (ONE).

• Tasks – Literature survey on DTN multicast routing protocols – Implementation of OS-Multicast and MIDTONE in ONE – Comparison of the OS-Multicast and MIDTONE with focus on delay and delivery rate

• References 1. Qing Ye; Liang Cheng; Mooi Choo Chuah; Davison, B.D., "OS-multicast: On-demand Situation-aware

Multicasting in Disruption Tolerant Networks," Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd , vol.1, no., pp.96,100, 7-10 May 2006[

2. Narmawala, Z.; Srivastava, S., "MIDTONE: Multicast in delay tolerant networks," Communications and Networking in China, 2009. ChinaCOM 2009. Fourth International Conference on , vol., no., pp.1,8, 26-28 Aug. 2009

• Focus 2 students theory/programming/evaluation


Prof. Jochen Seitz Dipl.-Inf. (FH) Peggy Begerow

Implementation of Multicast Protocols in ONE

13.02.2015 Page 1


Responsible Professor: Research Assistant:

Prof. Jochen Seitz M. Sc. Muhammad Usman Rashid [email protected]

• DescriptionInternet of Things (IoT) will be able to provide the cooperation between different heterogeneous endsystems while providing access to different subsets of data for the development of digital services. Dueto its versatility of use, building a general architecture for IoT is a complex task because of the largenumber of devices and link layer technologies. Considering these challenges, a research is required topropose an optimized routing protocol for IoT.

• Tasks– Research on the state of the art of routing protocols in IoT– Installation and getting familiar with simulators OMNeT++ and Contiki– Implementation of two suitable IoT routing protocols using simulators OMNeT++ and Contiki– Comparison and interpretation of results

• References1. Zanella, A.; Bui, N.; Castellani, A.; Vangelista, L.; Zorzi, M., "Internet of Things for Smart Cities," Internet of Things Journal, IEEE , vol.1, no.1,

pp.22—32, Feb. 20142. www.contiki-os.org3. www.omnetpp.org

• Focus2 students theory / programming / simulation / hardware / measurements / protocols

Comparison of Routing Protocols in Internet of Things (IoT) using OMNeT++ and Contiki



Lab: Communications Research Laboratory

Head: Prof. Dr.-Ing. Martin Haardt

15.08.2013 Page 16

• Description Filter bank based multi-carrier with offset quadrature amplitude modulation (FBMC/OQAM) systems have the potential of enabling an effective utilization of the available fragmented spectrum in heterogeneous radio environments. The use of OQAM gives rise to the potential of exploiting widely-linear processing in FBMC/OQAM systems. After some preliminary investigations, open issues remain.

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

orthogonal frequency-division multiplexing (OFDM) – Investigate existing widely-linear processing schemes via

a thorough literature study as well as extensive MATLAB simulations – Work on extensions of the current algorithm for MIMO FBMC/OQAM systems

• References [1] Y. Cheng and M. Haardt, “Widely Linear Processing in MIMO FBMC/OQAM Systems,” in Proc. ISWCS 2013, Aug. 2013. [2] J. Zhang and M. Haardt, “Widely linear signal processing for two-way relaying with MIMO amplify and forward relays,'‘in

Proc. ISWCS 2013, Aug. 2013. • Focus 1 or 2 students theory / programming / hardware / measurements


Prof. Martin Haardt Yao Cheng, Jianshu Zhang

Widely-linear processing for FBMC/OQAM systems

09.02.2015 Page 1


Responsible Professor: Research Adviser: E-Mail:

Prof. Dr. -Ing. Martin Haardt Dr. -Ing. Jianshu Zhang {jianshu.zhang}@tu-ilmenau.de

• 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



Prof. Dr. -Ing. Martin Haardt Dr.-Ing. Jianshu Zhang {jianshu.zhang}@tu-ilmenau.de

• Description: Robust principle component analysis (PCA) solved via Principal Component Pursuit (PCP) is a promising technique for detecting moving object in video surveillance. The existing PCP methods are based on vector-matrix representation. Since the video sequence has a multi-dimensional structure, it is natural to model it using a tensor model.

• Tasks – Literature study of the state of the art robust PCA methods and tensor based signal processing – Extending the existing method using tensor based signal processing – Define performance metrics and test cases to evaluate the performance of the proposed methods

• References

[1] T. Bouwmans and E. H. Zahzah, “Robust PCA via Principle Component Pursuit: a review for a comparative evaluation in video surveillance", Computer Vision and Image Understanding, 2014. [2] H. Guo, C. Qiu, and N. Vaswani, “An online algorithm for separating sparse and low-dimensional signal sequences from their sum”, IEEE Trans. Signal Process., Aug. 2014.

[3] F. Roemer, E. –K Kasnakli, Y. Cheng, and M. Haardt, “Tensor subspace tracking via Kronecker structured projections (TeTraKron)“, in Proc. of 5th IEEE Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2013.

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

Tensor-Based Robust PCA in Video Surveillance

• Description:

• Tasks– Literature study on tensor algebra and tensor decompositions.– Literature study on decomposition of low-rank tensor– Implementation of the state of the art algorithms

• References [1] T. G. Kolda and B. W. Bader. “Tensor decompositions and applications”. SIAM, 51:455-500, 2009. [2] M. Mardani, G. Mateos and G.B. Giannakis. “Imputation of Streaming Low-Rank Tensor data”, 8th IEEE Sensor Array and

Multichannel Signal Processing Workshop (SAM), 2014



Prof. Martin Haardt Kristina Naskovska

Decomposition of a low-rank tensor with missing entries

09.02.2015 Page 4

More and more often we deal with massive amounts of heterogeneous data, for that reason we would like to analyse the so called big data using tensor algebra. Moreover, some of this data is either missing or it is corrupted and needs to be estimated. This can be achieved via decomposition of a low-rank tensor with mission entries. An implementation of the state of the algorithms as well as appropriate modifications should be achieved.

assigned

• Description:

• Tasks – Literature study on tensor algebra and tensor decompositions. – Literature study on big data compression – Implementation of the state of the art algorithms

• References [1] T. G. Kolda and B. W. Bader. “Tensor decompositions and applications”. SIAM, 51:455-500, 2009. [2] N. D. Sidiropoulos, E.E Papalexakis and C. Faloutsos . “A Parallel Algorithm for Big tensor decomposition using randomly compressed cubes (PARACOMP)”, IEEE Internation Conference on Acoustic, Speech and Signal Processing (ICASSP), 2014




Compression of a big tensor using tensor decompositions

09.02.2015 Page 5

More and more often we deal with massive amounts of heterogeneous data, for that reason we would like to analyse the so called big data using tensor algebra. Since the big data requires a lot of memory space a first and obvious solution is to perform a compression of the data. For that reason an implementation of the state of the algorithms as well as appropriate modifications should be achieved.

• Description:The CP decomposition is unique up to permutation and scaling, if curtain constrains are fulfilled. An investigation and comparison of these constrains should be performed, for different algorithms such as ALS, SECSI, PARACOMP.

• Tasks– Literature study on tensor algebra and tensor decompositions.– Implementation of the state of the art algorithms– Convergences and uniqueness comparison.

• References [1] T. G. Kolda and B. W. Bader. “Tensor decompositions and applications”. SIAM, 51:455-500, 2009. [2] P. Comon and L.H. Lim . “Sparce Representation and Low-rank Tensor Approximation”, Rapport de recherche ISRN I3S/RR-2011-02-FR, 2011 [3] F. Roemer, C. Schroeter and M. Haardt, “A semi-algebraic framework for approximate CP decomposition via join matrix diagonalization and generalized unfoldings“, Asilomar 2012, 2012




Uniqueness of the CP decomposition

09.02.2015 Page 6

• Description:More and more often we deal with massive amounts of heterogeneous data, for that reason we would like to analyse the so called big data using tensor algebra. An example of a big data is a social network data. We would like to investigate how can we efficiently decompose a tensor into sparse factors, producing sparse approximations.

• Tasks– Literature study on tensor algebra and tensor decompositions.– Implementation of the state of the art algorithms

• References [1] T. G. Kolda and B. W. Bader. “Tensor decompositions and applications”. SIAM, 51:455-500, 2009. [2] E.E Papalexakis, C. Faloutsos , and N. D. Sidiropoulos. “ParCube: Sparse Parallelizable Tensor Decompositions”, ECML PKDD, Part I, LNCS 7523, pp. 512-536, 2012




Tensor based analysis of social network data

09.02.2015 Page 7

www.tu-ilmenau.de/ei_ms_csp 09.02.2015 www.tu-ilmenau.de/ei_ms_csp Page 8

Supervisor: Sher Ali Cheema, Dr. Bilal Zafar • Description:

5th Generation Non-Orthogonal Waveforms (5GNOW) is an explorative research proposal challenging theobedience of LTE and LTE-Advanced to strict synchronism and orthogonality with respect to futureapplications. The idea is to abandon synchronism and orthogonality altogether, thereby admitting somecrosstalk or interference, and to control these impairments by a suitable transceiver structure andtransmission technique. Current research addresses these design goals by various filter bank based signaldesign techniques. Currently four waveforms such as Generalized Frequency Division Multiplexing(GFDM), Universal Filtered Multicarrier (UFMC), Filter Bank Multicarrier (FBMC) and BiorthogonalFrequency Division Multiplexing (BFDM) are considered. In this work, a performance comparison of thesewaveforms will be done.

• Requirements: Programming skills in MATLAB.

• Tasks Review of the literature Performance comparison of these waveforms

• Literature:[1]. “5G Waveform Candidate Selection” 5GNOW D3.1 version 1.0 document. [2]. J. G. Andrews, “What will 5G Be?” in IEEE JSAC special issue on 5G wireless communication systems, May 2014.

• Focus 2/3 students theory / programming

Performance Comparison of 5G Modulation Schemes


Supervisor: Sher Ali Cheema • Description:

In OFDM based systems, the symbols are separated by guard intervals which are usually implemented bycyclic prefixes (CP). CP is a random sequence and is solely created in time domain by copying the lastpart of the output of IDFT. Instead of using a random sequence as CP, a known deterministic sequencecalled as unique word (UW) can be used which, in result, can be very helpful for channel estimation andsynchronization. Therefore, such UW systems does not require dedicated pilot carriers as compared tosystems using CP. In [1], two different methods are introduced to construct UW-OFDM. In this project, wewill compare the performance of UW-OFDM against the CP-OFDM for the LTE-A downlink scenario.


• Tasks Review of the literature Implementation of UW-OFDM in Matlab Performance comparison of UW-OFDM and CP-OFDM for LTE-A downlink

• Literature:[1]. A. Onic and M. Huemer, “Direct vs. two-step approach for unique word generation in UW-OFDM,” in Proc. 2010 Int. OFDM Work., pp.

145–149 Hamburg (Germany), September 2010. [2]. Huemer, M., Hofbauer, C., Huber, J.B “The Potential of Unique Words in OFDM” in Proceedings of the 15th International OFDM

Workshop. Hamburg (Germany), September 2010.

• Focus 1/2 students theory / programming

Unique Word OFDM for LTE-A Downlink



In OFDM based systems, the symbols are separated by guard intervals which are usually implemented bycyclic prefixes (CP). CP is a random sequence and is solely created in time domain by copying the lastpart of the output of IDFT. Instead of using a random sequence as CP, a known deterministic sequencecalled as unique word (UW) can be used which, in result, can be very helpful for channel estimation andsynchronization. Therefore, such UW systems does not require dedicated pilot carriers as compared tosystems using CP. In this project, we will investigate the channel estimation techniques for UW-OFDM.


• Tasks Review of the literature Channel estimation using UW

• Literature:[1]. A. Onic and M. Huemer, “Direct vs. two-step approach for unique word generation in UW-OFDM,” in Proc. 2010 Int. OFDM Work., pp.

145–149 Hamburg (Germany), September 2010. [2]. Huemer, M., Hofbauer, C., Huber, J.B “The Potential of Unique Words in OFDM” in Proceedings of the 15th International OFDM

Workshop. Hamburg (Germany), September 2010.

• Focus 1 students theory / programming

Channel Estimation Techniques for UW-OFDM



OFDM and its real-valued version DMT are popular schemes used to compensate the channel dispersionin direct detection optical systems. DMT schemes also take advantage of the CP, as in CP-OFDM, tomitigate the effect of channel dispersion. CP is a random sequence and is solely created in time domain bycopying the last part of the output of IDFT. Instead of using a random sequence as CP, a knowndeterministic sequence called as unique word (UW) can be used which, in result, can be very helpful forchannel estimation and synchronization. In this work, we will investigate the UW-OFDM structure for theDMT schemes and, based on this, propose new UW based DMT schemes for optical communicationsystems.


• Tasks Review of the literature Implementation of these schemes in Matlab

• Literature:[1]. Huemer, M., Hofbauer, C., Huber, J.B “The Potential of Unique Words in OFDM” in Proceedings of the 15th International OFDM

Workshop. Hamburg (Germany), September 2010. [2]. M. Wolf, L.Grobe, M. R. Rieche, A. Koher and J. Vucic, “ Block transmission with linear frequency domain equalization for dispersive

optical channels” in 12th International Conference on Transparent Optical Networks (ICTON) 2010, Munich, Germany. [3]. M. Wolf, M. Haardt, “ Comparison of OFDM and frequency domain equalization for dispersive optical channels with direct detection” in

14th International Conference on Transparent Optical Networks (ICTON) 2012, Coventry, England.


Unique Word based DMT Schemes assigned


Supervisor: Sher Ali Cheema

• Description:OFDM and its real-valued version DMT are popular schemes used to compensate channel dispersion indirect detection optical systems. One of the major drawback of OFDM is its high peak to average powerratio (PAPR) of the output signal which seriously limits the power efficiency of transmitter’s high poweramplifier. Transmitting a signal with high PAPR requires highly linear power amplifiers with a large back-offto avoid adjacent channel interference due to nonlinear effects. In this work, we will investigate the differentPAPR reduction algorithms for DMT schemes such as AC-DMT and DC-biased DMT.


• Tasks Review of the literature Implementation of different PAPR reduction algorithms in Matlab

• Literature: S.H. Han, J. H. Lee, “An overview of peak-to-average power ratio reduction techniques for multicarrier transmission” in IEEE wireless

communication volume 12, issue2, April 2005. M. Wolf, L.Grobe, M. R. Rieche, A. Koher and J. Vucic, “ Block transmission with linear frequency domain equalization for dispersive

optical channels” in 12th International Conference on Transparent Optical Networks (ICTON) 2010, Munich, Germany M. Wolf, M. Haardt, “ Comparison of OFDM and frequency domain equalization for dispersive optical channels with direct detection” in

14th International Conference on Transparent Optical Networks (ICTON) 2012, Coventry, England.


Peak to Average Power Ratio Reduction for DMT Schemes


Supervisor: Bilal Zafar, Sher Ali Cheema • Description:

In conventional cellular networks, users communicate via base stations (BS)however close range users may gain if they communicate directly betweeneach other. Device-to-device (D2D) networking allows direct communicationbetween cellular users and provide the following benefits: Offload traffic from the core network Higher data rates and power efficiency for both users and networks Optimized spectrum reuse if sharing is allowed (underlay case) Better coverage Improved energy efficiency and reduced backhaul demand

• Requirements: Strong programming skills in MATLAB and goodknowledge about wireless systems.

• Tasks When one should use direct D2D communication instead of cellular? Comparison between in-band (overlay and underlay) and out-of-band

modes Use of MIMO to provide additional degrees of freedom How to implement D2D on new generation systems where the

transceivers for uplink and downlink are different (please contact the supervisors for more details)


Device to Device (D2D) communications



Prof. Dr. -Ing. Martin Haardt Dr.-Ing. Kurt Blau [email protected]

Description: For the localization of objects in a room there a lot of realization possibilities (e.g. triangulation using phase measurements based on two or more base stations localized in the room etc.) In the present case the triangulation is to be replaced by the determination of the IDV. To determine the IDV it is necessary to measure the field strength of a radiated signal in combination with measurement of its angle of arrival at the antenna of the base station which is installed in the room (normally above the entrance door). The antenna of the base station consists of two “Patch”- radiators forming an interferometer unit. The two signals at the output of the radiators contain the necessary information to determine the IDV. From this point of view it is necessary to carry out measurements with the help of a Vector Network Analyzer (VNA) HP 8510C. Tasks:

– Literature study– Measurement of the RF level at the interferometer radiators output (excited by a radiating device at 2.45 GHz) an– Measurement of the phase angle between the two signals at different locations of the radiating device in a suitable

room (lab).– Finally the measured IDV’s and the actual location are to be compared and the results are interpreted in terms of

their significance. In particular, attention should be paid to the influence of possible measurement errors on theobtained results

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

Measurement of Indoor Distance Vectors (IDV’s) based on a Interferometer Technique

mailto:[email protected]

15.08.2013 www.tu- ilmenau.de/ei

_ms_csp

Page 25



RF and Microwave Research Laboratory

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

• DescriptionWireless links are a convenient and effective solution for data exchange in many applications. The ISM band at868 MHz is well suited for compact transceivers. More and more low-cost applications motivate the trendtowards simple truly planar printed circuit board (PCB) solutions. This project considers a planar inverted F-antenna (PIFA) with an additional conductive plane from a metallic housing in the near field of the antenna. Theradiation properties shall be analyzed and the optimum placement of the antenna PCB relative to the metalbody identified.

• Tasks– Qualitative design of a suitable PIFA structure– Numerical simulation of the 3D antenna structure

– Analysis and optimization of the radiation properties

• References (basic literature)

[1] C. A. Balanis, “Antenna Theory – Analysis and Design”, Wiley & Sons Inc., vol. 3, ch. 14.7, pp. 859-865, 2005.[2] Kevin R. Boyle, Peter G. Steeneken A Five-Band Reconfigurable PIFA for Mobile Phones, IEEE Transactions on Antennas and Propagation, Vol. 55, No.

11, November 2007.

• Focus1 student theory / programming / simulation / hardware / measurements / protocols

Page 1

Simulation and optimization of a planar 868 MHz antennaResponsible Professor: Prof. Matthias HeinResearch Assistant: Dr. Ralf Stephan, [email protected]

February 2015

Via

Feed

Ground

PCB

h

L

• DescriptionFor the design and test of new RF technologies it is necessary to characterize the existing electromagneticenvironment and to identify available frequency resources. This problem can be solved by “over-the-air”measurements of the RF electromagnetic spectrum. Therefore, the task of this project is to perform electric fieldmeasurements outside the area of the Helmholtzbau at TU Ilmenau. The measurements shall be performedwith a handheld spectrum analyzer and suitable antennas. The measured emissions shall be mapped to therespective radio service using the German national frequency plan.

• Tasks– Become familiar with the operation of the spectrum analyzer R&S FSH-8– Measure the RF electromagnetic spectrum in the range from 20 MHz to 6 GHz– Map the measured signals to the German national frequency plan

• References (basic literature)1. German Federal Network Agency, frequency plan (Frequenznutzungsplan)


Page 2

Investigation of the RF electromagnetic spectrum

February 2015

Responsible Professor: Prof. Matthias HeinResearch Assistant: Dr. Christian Bornkessel, [email protected]

Circularly polarized microstrip patch antenna array

February 2015

Responsible Professor: Prof. Matthias HeinResearch Assistant: Dipl.-Ing. Alexander Krauß, [email protected]

• DescriptionCircular polarization (CP) of patch antennas can be obtained by different feed arrangements or by modedistortions. The resulting polarization purity can be judged by the axial ratio. In the context of satellitecommunications, the dis/advantages of CP patch antenna arrays shall be analyzed, supported byelectromagnetic field simulations. The analysis addresses antenna and array parameters such as resonantfrequency, impedance and radiation bandwidths, return loss, radiation pattern, and gain.

• Tasks– Focused literature research– EM field simulation (Ansys HFSS) and selection of suitable designs– Comparative analysis of the different designs– Discussion of advantages and disadvantages

• References[1] C. A. Balanis, “Antenna Theory – Analysis and Design”, Wiley & Sons Inc., vol. 3, ch. 14.7, pp. 859-865, 2005.[2] J. Huang, “A technique for an array to generate circular polarization with linearly polarized elements”, IEEE Trans. Antennas Propag., vol. 34, no. 9.


assigned

• DescriptionThis project considers dual-band antennas for global navigation satellite system (GNSS) receivers. In contrast to multi-layer antennas, where two stacked resonators enable dual-band operation, in a single-layer antenna the two resonators are located in the same conducting layer. The single-layer approach is followed here due to the ease of manufacturing as printed circuit boards. Special attention shall be devoted to the design of single-layer dual-band antennas with prescribed radiation patterns and polarization purity.

• Tasks– Understanding the multi-layer and single-layer concepts– Designing a dual-band single-layer antenna using numerical simulations (CST or HFSS)– Optimizing the antenna properties in terms of radiation patterns and polarization

• References (basic literature)1. A. A. Heidari, M. Heyrani, and M. Nakhkash, “A DUAL-BAND CIRCULARLY POLARIZED STUB LOADED MICROSTRIP

PATCH ANTENNA FOR GPS APPLICATIONS”, Progress In Electromagnetics Research, PIER 92, 195–208, 2009.2. Shyh-Yeong Ke, “A Dual-band Microstrip Antenna for Precise GPS Applications”, 2012


Page 4

Single layer dual-band antenna for satellite navigation systems

February 2015

Responsible Professor: Prof. Matthias HeinResearch Assistant: M.Sc. Maysam Ibraheam, [email protected]

• DescriptionThe Wilkinson power divider is a conventional structure for power splitting in RF and microwave devices. Main advantages of this type of coupler are the matching at all ports and a high isolation between the output ports. However, at elevated frequencies, e.g., in the Ka-band frequency range, the electrical length of the resistor de-teriorates the performance. A modification of the conventional structure [3] may be used to mitigate this effect. In this research project, the conventional structure shall be accordingly modified, and a divider in stripline imple-mentation shall be designed and optimized for operation at the Ka-band downlink frequencies (17…22 GHz).

• Tasks– Investigate the modified structure in Agilent ADS– Design and optimize the modified divider in CST Microwave studio– Compare the results with the theoretically expected performance

• References (basic literature)1. E.J. Wilkinson, "An N-way Hybrid Power Divider, “IRE Trans. on MTT, vol. 8, p. 116-118, Jan. 1960.2. D.M. Pozar, “Microwave Engineering,” 4th ed., Wiley, 2012, pp. 328-333.3. T. Klein, J. Kassner, R. Kulke, C. Günner, H. Wolf, “Extendable Ka-Band Power-Divider Module in LTCC

Technology,” Proceedings of Asia Pacific Microwave Conference (APMC), pp. 1264-1267, December 2010.


Page 5

A modified Ka-band 2-way Wilkinson power dividerResponsible Professor: Prof. Matthias HeinResearch Assistant: Dipl.-Ing. Steffen Spira, [email protected]

February 2015



Electronic Measurement Research Lab

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

15.08.2013 Page 30

• Description: In terms of a doctoral thesis a novel measurement architecture for Compressive Sensing based Direction of Arrival (DoA) estimation has been developed. The DoA estimation method involves random beamforming. A student is expected to find random beamforming methods suitable (optimal) for the developed measurement architecture.

• Tasks – Acquaintance with the Compressive Sensing – Literature study on pseudo-random complex-valued

sequence generation methods – Simulation-based study of the methods’ performance – Introduction of the metric for assessment of the

methods’ suitability (optional)

• References [1] X. Yang, W. Jiang, and B. Vucetic, “A random beamforming technique for broadcast channels in multiple antenna systems,”

in Vehicular Technology Conference (VTC Fall), 2011 IEEE, Sept 2011, pp. 1–6. [2] X. Yang, W. Jiang, and B. Vucetic, “A random beamforming technique for omnidirectional coverage in multiple-antenna

systems,” Vehicular Technology, IEEE Transactions on, vol. 62, no. 3, pp. 1420–1425, March 2013. [3] Y. Wang, G. Leus, and A. Pandharipande, “Direction estimation using compressive sampling array processing,” in IEEE/SP

15th Workshop on Statistical Signal Processing, 2009, pp. 626 – 629.



Prof. Reiner Thomä M.Sc. Sergii Skoblikov

Random Beamforming Methods for Compressive Sensing Based Direcion of Arrival Estimation

09.02.2015 Page 1

Department of Computer Science and Automation

Institute of Computer Engineering

Integrated Communication Systems Group Head: Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel

15.08.2013 Page 34

15.08.2013 www.tu- ilmenau.de/ei

_ms_csp

Page 37

Head: Prof. Dr.-Ing. Gerald Schuller

Applied Media Systems

Filter Bank Multi Carrier with Low Delay Filter Banks


Responsible Professor: Research Advisor:

Prof. Prof. G. Schuller M.Sc. Michael Sturm

• DescriptionImplement an FBMC transmission scheme with Low Delay Filter Banks

• Tasks- Implement an FBMC transmission scheme with Low Delay Filter Banks- Simulate in Matlab and Python - Compare to the State-of-the Art

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

http://www.nsnam.org/

https://code.google.com/p/ns-3-highway-mobility/

http://www.dlr.de/ts/en/desktopdefault.aspx/tabid-9883/16931_read-41000/

topics for the mscsp advanced research projects · - generate a file for mobility traces based on...

Documents