Visa Koivunen

Visa Koivunen received his D.S. Tech. degree with honors from the Department of Electrical Engineering, University of Oulu, and was selected the Primus Doctor (Best Graduate) in years 1990–1994. From 1992 to 1995 he was a Visiting Researcher at the University of Pennsylvania, Philadelphia, USA. In 1996 he held a faculty position at the Department of Electrical Engineering, University of Oulu. From August 1997 to August 1999 he was an Associate Professor at the Signal Processing Laboratory, Tampere University of Technology. Since 1999 he has been a Professor of signal processing at the Department of Electrical and Communications Engineering, Helsinki University of Technology (HUT), Finland. He is one of the Principal Investigators in SMARAD Center of Excellence in Radio and Communications Engineering nominated by the Academy of Finland. In 2003 he was appointed to Adjunct Professor at the University of Pennsylvania, Philadelphia, USA. Dr. Koivunen's research interests include statistical and sensor array signal processing as well as wireless communications. He has published more than 160 papers in international scientific conferences and journals. He is a Member of the IEEE Signal Processing for Communication Technical Committee (SPCOM-TC).

Biography Updated on 14 October 2004

Articles in Scholarly Journals [Incomplete List]

  1. Blind equalization in spatial multiplexing MIMO-OFDM systems based on vector CMA and decorrelation criteria
    Wireless Personal Communications, vol. 43, no. 4, pp. 1151–1172, 2007
  2. State-space approach to spatially correlated MIMO OFDM channel estimation
    Signal Processing, vol. 87, no. 9, pp. 2272–2279, 2007
  3. Blind despreading of short-code DS-CDMA signals in asynchronous multi-user systems
    Signal Processing, 2007
  4. Automatic Radar Waveform Recognition
    IEEE Journal of Selected Topics in Signal Processing, vol. 1, no. 1, pp. 124–136, 2007
  5. Householder Multistage Wiener Filter for Space-Time Navigation Receivers
    IEEE Transactions on Aerospace and Electronic Systems, vol. 43, no. 3, pp. 975–988, 2007
  6. Stochastic Maximum-Likelihood Method for MIMO Propagation Parameter Estimation
    IEEE Transactions on Signal Processing, vol. 55, no. 1, pp. 46–55, 2007
  7. DoA Estimation Via Manifold Separation for Arbitrary Array Structures
    IEEE Transactions on Signal Processing, vol. 55, no. 10, pp. 4800–4810, 2007
  8. Joint Angular- and Delay-Domain MIMO Propagation Parameter Estimation Using Approximate ML Method
    IEEE Transactions on Signal Processing, vol. 55, no. 10, pp. 4775–4790, 2007
  9. Complex Random Vectors and ICA Models: Identifiability, Uniqueness, and Separability
    IEEE Transactions on Information Theory, vol. 52, no. 3, pp. 1017–1029, 2006
  10. Blind Frequency Synchronization in OFDM via Diagonality Criterion
    IEEE Transactions on Signal Processing, vol. 54, no. 8, pp. 3125–3135, 2006
  11. Beamspace Transform for UCA: Error Analysis and Bias Reduction
    IEEE Transactions on Signal Processing, vol. 54, no. 8, pp. 3078–3089, 2006
  12. Blind I/Q Signal Separation-Based Solutions for Receiver Signal Processing
    EURASIP Journal on Applied Signal Processing, vol. 2005, no. 16, pp. 2708–2718, 2005
  13. Adaptive equalization of time-varying MIMO channels
    Signal Processing, vol. 85, no. 1, pp. 81–93, 2005
  14. Blind Signal Estimation in Conjugate Signal Models With Application to I/Q Imbalance Compensation
    IEEE Signal Processing Letters, vol. 12, no. 11, pp. 733–736, 2005
  15. Identifiability, Separability, and Uniqueness of Linear ICA Models
    IEEE Signal Processing Letters, vol. 11, no. 7, pp. 601–604, 2004
  16. Independent component analysis via optimum combining of kurtosis and skewness-based criteria*1
    Journal of the Franklin Institute, vol. 341, no. 5, pp. 401–418, 2004
  17. Joint Time-Domain Tracking of Channel and Frequency Offsets for MIMO OFDM Systems
    Wireless Personal Communications, vol. 31, no. 3-4, pp. 181–200, 2004
  18. Blind Channel Estimation in Multicode CDMA Using Multiantenna Receiver
    Wireless Personal Communications, vol. 28, no. 3, pp. 163–178, 2004
  19. Delay Estimation in Long-Code Asynchronous DS/CDMA Systems Using Multiple Antennas
    EURASIP Journal on Wireless Communications and Networking, vol. 2004, no. 1, pp. 84–97, 2004
  20. Estimates of Regression Coefficients Based on Lift Rank Covariance Matrix
    Journal of the American Statistical Association, vol. 98, no. 461, pp. 90–98, 2003
  21. Wireless Personal Communications, vol. 26, no. 1, pp. 33–52, 2003
  22. Characteristic-function-based independent component analysis
    Signal Processing, vol. 83, no. 10, pp. 2195–2208, 2003
  23. Affine equivariant multivariate rank methods
    Journal of Statistical Planning and Inference, vol. 114, no. 1-2, pp. 161–185, 2003
  24. The Journal of VLSI Signal Processing, vol. 32, no. 1/2, pp. 83–92, 2002
  25. Blind separation methods based on Pearson system and its extensions
    Signal Processing, vol. 82, no. 4, pp. 663–673, 2002
  26. Adaptive Algorithm for Blind Separation from Noisy Time-Varying Mixtures
    Neural Computation, vol. 13, no. 10, pp. 2339–2357, 2001
  27. Performance bounds for multistep prediction-based blind equalization
    IEEE Transactions on Communications, vol. 49, no. 1, pp. 84–93, 2001
  28. Subspace-based direction-of-arrival estimation using nonparametric statistics
    IEEE Transactions on Signal Processing, vol. 49, no. 9, pp. 2060–2073, 2001
  29. Advanced methods for I/Q imbalance compensation in communication receivers
    IEEE Transactions on Signal Processing, vol. 49, no. 10, pp. 2335–2344, 2001
  30. Autocorrelation properties of channel encoded sequences-applicability to blind equalization
    IEEE Transactions on Signal Processing, vol. 48, no. 12, pp. 3501–3507, 2000
  31. Sign and rank covariance matrices
    Journal of Statistical Planning and Inference, vol. 91, no. 2, pp. 557–575, 2000
  32. Nonlinear filtering techniques for multivariate images — Design and robustness characterization
    Signal Processing, vol. 57, no. 1, pp. 81–91, 1997
  33. Nonlinear filtering of multivariate images under robust error criterion
    IEEE Transactions on Image Processing, vol. 5, no. 6, pp. 1054–1060, 1996
  34. International Journal of Pattern Recognition and Artificial Intelligence, vol. 10, no. 2, p. 165, 1996
  35. A robust nonlinear filter for image restoration
    IEEE Transactions on Image Processing, vol. 4, no. 5, pp. 569–578, 1995
  36. Active 3-D vision system for automatic model-based shape inspection
    Optics and Lasers in Engineering, vol. 10, no. 3-4, pp. 149–160, 1989