SCHOOL OF ENGINEERING AND COMPUTER SCIENCE

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Dr Pawel Dmochowski

BASc UBC, MSc, PhD Queen's (Canada)

Senior Lecturer in Electronic Engineering
School of Engineering and Computer Science
Alan MacDiarmid, Room 227
p: +64 4 463 5948
f: +64 4 463 5045
e: Pawel.Dmochowski@ecs.vuw.ac.nz

Note to potential students: I am currently looking for PhD students to work on a number of physical layer topics, including
  • Cognitive Radio (Physical Layer/Information Theoretic) - interference alignment and mitigation, performance analysis
  • Multi-user Multi-cell MIMO - beamforming, codebook design for limited feedback...

Interested persons should contact me with a CV and a brief description of their research background.

Please see http://ecs.victoria.ac.nz/Groups/CSP/StudentInformation for information on the application process.

Publications

Publication list

Research Projects

For other related projects in the communications area, see Communications and Signal Processing Research group.

I am currently involved in a number of research projects, mainly within the physical layer of wireless communications. Broadly speaking, these include
  • Cognitive Radio
  • Limited Feedback Beamforming
  • Channel estimation and prediction

Interference in Cognitive Radio

in collaboration with Mansoor Shafi (Telecom NZ) and Peter Smith (University of Canterbury)

We are investigating the total interference encountered by a Primary (licensed) User (PU) due to the presence of Secondary (Cognitive) Users (CRs). This includes
  • statistical characterization of the aggregate interferences due to CRs
  • interference mitigation strategies

Key publications:

[1] P.A. Dmochowski, P.J. Smith, M.Shafi, and H.A. Suraweera. On the impact of antenna selection on cognitive radio system capacity. In 6th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, Osaka, June 2011.
[2] M.F. Hanif, P.J. Smith, and P.A. Dmochowski. On interference and deployment issues for cognitive radio systems in shadow fading environments. IET Communications, 2011. under review.
[3] A. Firag, P.J. Smith, P.A. Dmochowski, and M. Shafi. Analysis of the m/m/n/n queue with two types of arrival process: Applications to future mobile radio systems. Journal of Applied Mathematics, 2011. under review.
[4] P.A. Dmochowski, H.A. Suraweera, P.J. Smith, and M. Shafi. Impact of channel knowledge on cognitive radio system capacity. In Proc. IEEE 72nd Vehicular Technology Conference, Ottawa, September 2010. [ DOI ]
[5] Y. Ren, P.A. Dmochowski, and P. Komisarczuk. Analysis and implementation of reinforcement learning on a GNU radio cognitive radio platform. In Proc. 5th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, Cannes, June 2010. [ http ]
[6] M.F. Hanif, M. Shafi, P.J. Smith, and P.A. Dmochowski. Interference and deployment issues for cognitive radio systems in shadowing environments. In Proc. IEEE International Conference on Communications, Dresden, June 2009. [ DOI ]

Symbol timing synchronisation in OSTBC receivers

in collaboration with Prof. Peter J. McLane at Queen's University, Kingston.

We have developed symbol timing error detectors (TEDs) for orthogonal space time code (OSTBC) receivers. These low complexity algorithms are suitable for timing error tracking applications.Currently the focus is on extension to Quasi OSTBC systems.

Key publications:

[1] P.A. Dmochowski and P.J. McLane. Timing error detector design and analysis for orthogonal space-time block coding receivers. IEEE Transactions on Communications, 56:1939--1949, November 2008. [ DOI ]
[2] P.A. Dmochowski and P.J. McLane. Analysis of timing error detectors for orthogonal space-time block codes. In Proc. IEEE International Conference on Communications, pages 2949--2955, Glasgow, June 2007. [ DOI ]
[3] P.A. Dmochowski and P.J. McLane. Timing error detector design and analysis for quasi-orthogonal space-time block coding. In Proc. IEEE Wireless Communications and Networking Conference, pages 1166--1171, Hong Kong, March 2007. [ DOI ]
[4] P.A. Dmochowski and P.J. McLane. Design of timing error detectors for orthogonal space-time block codes. In Proc. 17th IEEE International Symposium on Personal,Indoor and Mobile Radio Communications, Helsinki, September 2006. [ DOI ]
[5] P.A. Dmochowski and P.J. McLane. Timing synchronization for real-valued orthogonal space-time block codes. In 23rd Queen's Biennial Symposium on Communications, Kingston, May 2006. [ DOI ]
[6] P.A. Dmochowski and P.J. McLane. On the properties of a robust timing error detector for alamouti space-time coding in flat rayleigh fading mimo channels with randomly distributed timing drift. In Proc. IEEE Global Telecommunications Conference, pages 193--198, St. Louis, November 2005. [ DOI ]
[7] P.A. Dmochowski and P.J. McLane. Joint timing epoch tracking and channel estimation for rayleigh fading mimo channels. In Proc. 16th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Berlin, September 2005. [ DOI ]
[8] P.A. Dmochowski and P.J. McLane. Robust timing epoch tracking for alamouti space-time coding in flat rayleigh fading mimo channels. In Proc. IEEE International Conference on Communications, Seoul, May 2005. [ DOI ]
[9] P.A. Dmochowski and P.J. McLane. Joint timing and pilot symbol channel estimation for diversity receivers in rayleigh fading channels. In Proc. 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Barcelona, September 2004. [ DOI ]

Current Students

Past Students

  • Harry Jones - SDR implementation of channel estimation and prediction (BScTech Honours, co-supervised with Paul Teal )
  • Ren Yu - SDR implementation of Cognitive Radio MAC protocol (MSc, co-supervised with Peter Komisarczuk )

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