CENK TOKER, PhD.

Past, Present and Future

Research Interests

Publications

Teaching

Research

CV

Calendar

Past,Present and Future

Cenk Toker was born in Ankara, Turkey, in 1974. He was with TUBITAK-BILTEN between Aug. 1995 and Aug. 1999 as a researcher. Later, he joined the DSP software development group of ASELSAN Inc. in Jun. 2000 where he worked as a senior engineer until Sep. 2001. He conducted his PhD studies between Feb. 2002 and Nov. 2004 at the Centre for Digital Signal Processing Research (CDSPR), King's College London, UK where he also worked as a research and teaching assistant. Between Jul. 2002 and Oct. 2002 he was with Motorola, Swindon, UK, as a systems engineer. He was a postdoctoral research associate at CDSPR, KCL between March-Sept. 2005. As from Sept. 2005, he joined the faculty of the Department of Electrical and Electronics Engineering, Hacettepe University, Ankara, Turkey, where he is currently an assistant professor.

Research Interests

Dr Toker's current research interests include the following

• MIMO channel equalization, particularly channel shortening,

• Resource allocation problem for multiuser MIMO-OFDM systems in the perspective of optimization theory,

• Transmitter and receiver design for OFDM based systems,

• Space-Time Coding and Spatial multiplexing,

• CDMA and OFDM transmission techniques,

• Optimization Theory,

• Modelling and advanced signal processing techniques for wireline communications (PLC, xDSL)

Research Projects

• TUBITAK, Turkey, 107E056 ($95,000) (Principal Investigator)  “Channel Shortening Equaliser Design and Resource Allocation Algorithm Development for MCM Based Communication Systems”, July 2007 – July 2010

• ASELSAN Inc., Turkey ($114,000) (Associate Investigator) “Modulation Classification for Communication Systems”, July 2007 – March 2008

• EPSRC, UK GR/S16775/01 (£106,084.00) (Researcher) “Novel Signal Processing Techniques for Enhancing the Downlink Capacity of a Wireless Communication System” Aug. 2003 – Oct. 2005

• Motorola Inc., UK, (Researcher)  “Smart Antennas”, University Partnership in Research Programme, 2001

• ASELSAN Inc., Turkey, (Researcher)  “Design of the IDRS System”, 1998-1999,

• ASELSAN Inc., Turkey, (Researcher)  “DSSS Packet Radio Simulation Project”, 1995-1997

Publications

Journal

1. C. Toker, S. Lambotharan, J. A. Chambers, “Closed Loop Quasi-Orthogonal STBCs and their Performance in Multipath Fading Environments when Combined with Turbo Codes”, IEEE Trans. Wireless Communications, Nov. 2004,

2. C.Toker, S. Lambotharan, J. A. Chambers, B. Baykal, “Joint Spatial and Temporal Channel Shortening Techniques for Frequency Selective Fading MIMO Channels”, IEE Proceedings – Communications, Feb. 2005,

3. S. Lambotharan, C. Toker, “Closed-Loop Space Time Block Coding Techniques for OFDM based Broadband Wireless Access Systems”, IEEE Trans. Consumer Electronics, Aug. 2005

4. S. Lambotharan, Y. Luo, C. Toker, S. R. Alty, M. Gani, “'Blind Multiuser Detection of STBC Signals Using Hybrid Constant Modulus and Subspace Methods”, IEE Proceedings - Communications, Apr. 2006,

5. C. Toker, S. Lambotharan, J. A. Chambers, “Joint Transceiver Design for MIMO Channel Shortening”, IEEE Trans. Signal Processing , July 2007

6. C. Toker, G. Altın, “Blind, Adaptive Channel Shortening Equalizer Algorithm which can Provide Shortened Channel State Information (BACS-SI),”, IEEE Trans. Signal Processing , April 2009 presentation

Conference

1. C.Toker, Gökhan Altın, "An Adaptive Blind Channel Shortening Algorithm for MCM Systems", EUSIPCO, Poznan, Poland, 2007,presentation

2. C.Toker, Gökhan Altın, "Blind, Adaptive Channel Shortening Equaliser Design with Shortened Channel State Information (BACS-SI)" IEEE 15th SIU, Eskisehir, Turkey, 2007

3. C.Toker, Semir Altıniş, "Robust Channel Shortening Equalization" COST 289 3rd Workshop, Aveiro, Portugal, 2006

4. C. Toker, S. Lambotharan, J. A. Chambers, “Orthogonalization of Quasi-Orthogonal Space-Time Block Codes in Multipath Fading Environments”, EUSIPCO, Antalya, Turkey, 2005, presentation

5. C.Toker, S.Lambotharan, J.A. Chambers, "Channel Shortening for MIMO Systems", IEE Conference on DSP Enabled Radio, Glasgow, U.K. 2005

6. C.Toker, S.Lambotharan, “Sensitivity of the Orthogonalization Methods for QO-STBC to Feedback Errors in an OFDM Environment”, COST 289 2^nd Workshop, Antalya, Turkey, 2005, presentation

7. C. Toker, S. Lambotharan, J. A. Chambers, “Joint Transmitter and Receiver Design for MIMO Channel Shortening”, IEEE ICASSP, Philadelphia, PA, 2005, presentation

8. C. Toker, S. Lambotharan, J. A. Chambers, B. Baykal, “Channel Shortening Filter Design Based on Polynomial Methods”, IEEE VTC Spring, Milan, Italy, 2004, presentation

9. C. Toker, S. Lambotharan, J. A. Chambers, “Infinite Length Channel Shortening Filtering Based on Polynomial Approach”, EUSIPCO, Vienna, Austria, 2004,

10. C. Toker, S. Lambotharan, J. A. Chambers, “Space-Time Block Coding for Four Transmit Antennas with Closed Loop Feedback over Frequency Selective Fading Channels”, IEEE Information Theory Workshop, Paris, France, 2003,

11. C. Toker, S. Lambotharan, J. A. Chambers, “Quasi-Orthogonal Space Time Block Codes with Feedback and Transmit Beamformers”, London Communication Symposium, London, U.K., 2003, presentation

12. C. Toker, Y. Tanık, “Performance Analysis of a Joint Matched Filter Based Synchronization Method for Direct Sequence Spread Spectrum Radio”, IEEE VTC Fall, Atlantic City, NJ, 2001,

13. C. Toker, “Implementation of Turbo Codes on a Digital Signal Processor”, 1^st National Symposium on Telecommunication Technologies, METU, Ankara, 2001.
     

Theses

• PhD Dissertation (2004), Signal Processing Algorithms and Architectures for Communication Transceivers, King's College London, University of London, United Kingdom, pdf

• MSc Thesis (1999), Performance Analysis of a New Synchronization Method for Direct Sequence Spread Spectrum Radio, METU, Ankara, Turkey.

Resources

1. Structure and Design of MMSE Channel Equalizers, seminar, Hacettepe University

2. Multiuser Detection and Iterative Detection, KCL

Last updated: 02.05.2008