Full Publication List

Submitted
  1. Z.-Q. Luo, W.-K. Ma, A. M.-C. So, Y. Ye, and S. Zhang, "Nonconvex quadratic optimization, semidefinite relaxation, and applications," submitted to IEEE Signal Processing Magazine, Special Issue on Convex Optimization for Signal Processing, Sep. 2009.
  2. T.-H. Chang, C.-W. Hsin, W.-K. Ma, and C.-Y. Chi, ¡§A linear fractional semidefinite relaxation approach to maximum-likelihood detection of higher order QAM OSTBC in unknown channels,¡¨ submitted to IEEE Trans. Signal Process., Jan. 2009. Revised, Aug. 2009.

Accepted Journal Papers
  1. W.-K. Ma, T.-H. Hsieh, and C.-Y. Chi, ¡§DOA estimation of quasi-stationary signals with less sensors than sources and unknown spatial noise covariance: A Khatri-Rao subspace approach,¡¨ to appear in IEEE Trans. Signal Process. Accepted Aug. 2009.
  2. W.-K. Ma, C.-C. Su, J. Jaldén, T.-H. Chang, and C.-Y. Chi, ¡§The equivalence of semidefinite relaxation MIMO detectors for higher-order QAM,¡¨ to appear in IEEE Journal of Selected Topics of Signal Processing, Aug. 2008. Preprint available here.
  3. T.-H. Chan, C.-Y. Chi, Y.-M. Huang, and W.-K. Ma, ¡§A convex analysis based minimum-volume enclosing simplex algorithm for hyperspectral unmixing,¡¨ to appear in IEEE Trans. Signal Process., 2009.

Book Chapters
  1. W.-K. Ma, T.-H. Chan, C.-Y. Chi, and Y. Wang, ¡§Convex analysis for non-negative blind source separation with application in imaging,¡¨ in Convex Optimization in Signal Processing and Communications, D. P. Palomar, Y. Eldar, Eds., to appear, 2009.s

Published Journal Papers
  1. F. Tian, X.-G. Xia, P. C. Ching, and W.-K. Ma, ¡§Signal detection in a space-frequency coded cooperative communication system with multiple carrier frequency offsets by exploiting specific properties of the code structure,¡¨ IEEE Trans. Vehicular Tech.,  vol. 58, no. 7, pp. 3396¡X3409, Sep. 2009.
  2. W. Ng, C. Ji, W.-K. Ma, and H. C. So, ¡§A study on particle filters for single-tone frequency tracking,¡¨ IEEE Trans. Aerospace and Electronic Systems, vol. 45, no. 3, pp. 1111¡X1125, July 2009.
  3. S. A. Pasha, B.-N. Vo, H. D. Tuan, and W.-K. Ma, ¡§A Gaussian mixture PHD filter for jump Markov system models,¡¨ IEEE Trans. Aerospace and Electronic Systems, vol. 45, no. 3, pp. 919¡X936, July 2009.
  4. J.-K. Zhang and W.-K. Ma, ¡§Full diversity blind Alamouti space-time block codes for unique identification of flat-fading channels,¡¨ IEEE Trans. Signal Processing, vol. 57, no. 2, pp. 635-644, Feb 2009.
  5. Kenneth W. K. Lui, W.-K. Ma, H. C. So, and K. W. Chan, ¡§Semi-definite programming algorithms for sensor network node localization with uncertainties in anchor positions and/or propagation speed,¡¨ IEEE Trans. Signal Processing, vol. 57, no. 2, pp. 752-763, Feb 2009.
  6. K.W. Chan, H.C. So, and W.-K. Ma, ¡§A novel subspace approach for cooperative localization in wireless sensor networks using range measurements,¡¨ IEEE Trans. Signal Processing,  vol. 57, no. 1, pp. 260-269, Jan 2009.
  7. T.-H. Chan, W.-K. Ma, C-.Y. Chi, and Y. Wang, "A convex analysis framework for blind separation of non-negative sources," IEEE Trans. Signal Process., vol. 56, no. 10, pp. 5120-5134, Oct. 2008.
  8. C.-Y. Chi, C.-H. Peng, K.-C. Huang, T.-H. Tsai, and W.-K. Ma, "A block-by-block blind post-FFT multistage beamforming algorithm for multiuser OFDM systems based on subcarrier averaging," IEEE Trans. Wireless Commun., vol. 7, no. 8, pp. 3238-3251, Aug. 2008.
  9. T.-H. Chang, W.-K. Ma, and C.-Y. Chi, "Maximum-likelihood detection of orthogonal space-time block coded OFDM in unknown block fading channels,"  IEEE Trans. Signal Processing, vol. 56, no. 4, pp. 1637-1649, Apr. 2008.
  10. J. Zheng, Kenneth W. K. Lui, W.-K. Ma, and H. C. So, ¡§Two simplified recursive Gauss¡VNewton algorithms of a real sinusoid for direct amplitude and phase tracking,¡¨ IEEE Signal Process. Lett., vol. 14, no. 12, pp. 972-975, Dec 2007.
  11. W.-K. Ma, "Blind ML detection of orthogonal space-time block codes: Identifiability and code construction," IEEE Trans. Signal Processing, vol. 55, no. 7, pp. 3312-3324, July 2007.
  12. B.-N. Vo and W.-K. Ma, "The Gaussian mixture probability hypothesis density filter," IEEE Transactions on Signal Processing, vol. 54, no. 11, 4091-4104, Nov. 2006.
  13. W.-K. Ma, B.-N. Vo, S. Singh, and A. Baddeley, "Tracking an unknown time-varying number of speakers using TDOA measurements: A random finite set approach," IEEE Transactions on Signal Processing, vol. 54, no. 9, 3291-3304, Sept. 2006.
  14. K. W. Cheung, H. C. So, W.-K. Ma, and Y. T. Chan, "A constrained least squares approach to mobile positioning: Algorithms and optimality," EURASIP Journal on Applied Signal Processing, vol. 2006, Article ID 20858, pp. 1-23, 2006.
  15. W.-K. Ma, B.-N. Vo, T.N. Davidson, and P.C. Ching, "Blind ML detection of orthogonal space-time block codes: High-performance, efficient implementations," IEEE Transactions on Signal Processing, vol. 54, no. 2, 738-751, Feb. 2006.
  16. H. C. So, W.-K. Ma, A. Farina, F. Gini, and W. Y. Tsui, "On four suboptimal quadratic detectors for random signals," IEICE Transactions on Communications, vol. E88-B, no. 12, 4527-4533, Dec. 2005.
  17. W.-K. Ma, P.C. Ching, and Z. Ding, "Semidefinite relaxation based multiuser detection for M-ary PSK multiuser systems," IEEE Transactions on Signal Processing, vol. 52, no. 10, 2862-2872, October 2004.
  18. W.-K. Ma, T.N. Davidson, K.M. Wong, and P.C. Ching, "A block alternating likelihood maximization approach to multiuser detection," IEEE Transactions on Signal Processing, vol. 52, no. 9, 2600-2611, September 2004.
  19. W.-K. Ma and P.C. Ching, "Crosstalk resilient interference cancellation in microphone arrays using Capon beamforming," IEEE Transactions on Speech and Audio Processing, vol. 12, no. 5, 468-477, September 2004.
  20. K.W. Cheung, H.C. So, W.-K. Ma, and Y.T. Chan, "Least squares algorithms for time-of-arrival based mobile location," IEEE Transactions on Signal Processing, vol. 52, no. 4, 1121-1128, April 2004
  21. W.-K. Ma and P.C. Ching, "Asymptotic minimum bit error rate property of maximum-likelihood multiuser detection," IEEE Communication Letters, vol. 7, no. 9, 425-427, September 2003
  22. W.-K. Ma, T.N. Davidson, K.M. Wong, Z.Q. Luo and P.C. Ching, "Quasi-maximum-likelihood multiuser detection using semi-definite relaxation with application to synchronous CDMA," IEEE Transactions on Signal Processing, vol. 50, no. 4, pp. 912-922, April 2002. (cited 170 times according to Scholar Google, cited 107 times according to ISI Web of Science, classified as ¡¥Highly-Cited Paper¡¦ by ISI Essential Science Indicator.)
  23. H.C. So, W.-K. Ma, and Y.T. Chan, "Detection of random signals via spectrum matching," IEEE Transactions on Aerospace and Electronic Systems, vol. 38, no. 1, pp. 301-306, January 2002.
  24. W.-K. Ma, K.M. Wong, and P.C. Ching, "On computing Verdu's upper bound for a class of maximum-likelihood multiuser detection and sequence detection problems," IEEE Transactions on Information Theory, vol. 47, no. 7, pp. 3049-3053, 2001.
  25. W.-K. Ma and Y.T. Zhang, "Estimation of distortion product otoacoustic emissions," IEEE Transactions on Biomedical Engineering, vol. 46, no. 10, pp. 1261-1264, 1999.
  26. W.-K. Ma, Y.T. Zhang, and F.S. Yang, "A fast recursive-least-squares adaptive notch filter and its applications to biomedical signals," Medical and Biological Engineering and Computing, vol. 37, pp. 99-103, 1999.  

Conference Papers

  1. T.-H. Chan, W.-K. Ma, C.-Y. Chi, and A. Ambikapathi, ¡§Hyperspectral unmixing from a convex analysis and optimization perspective,¡¨ in WHISPER2009 (First Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing), Grenable, France, Aug. 2009. (invited paper)
  2. T.-H. Chang, W.-K. Ma, C.-Y. Kuo, and C.-Y. Chi, ¡§Blind maximum-likelihood detection for decode-and-forward randomized distributed OSTBC,¡¨ in SPAWC2009, Perugia, Italy, June 2009.
  3. W.-K. Ma, T.-H. Hsieh, and C.-Y. Chi, ¡§DOA estimation of quasi-stationary signals via Khatri-Rao subspace,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  4. T.-H. Chang, W.-K. Ma, C.-Y. Huang, and C.-Y. Chi, ¡§On perfect channel identifiability of semiblind ML detection of orthogonal space-time block coded OFDM,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  5. Z. Quan, W.-K. Ma, S. Cui, and A. H. Sayed, ¡§Optimal linear fusion for distributed spectrum sensing via semidefinite programming,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  6. T.-H. Chan, C.-Y. Chi, Y.-M. Huang, and W.-K. Ma, ¡§A convex analysis based minimum-volume enclosing simplex algorithm for hyperspectral unmixing,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  7. W. K. Lui, W.-K. Ma, H. C. So, and K. W. Chan, ¡§Semi-definite programming approach to sensor network node localization with anchor position uncertainty,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  8. F. Tian, X.-G. Xia, W.-K. Ma, and P. C. Ching, ¡§Full diversity under multiple carrier frequency offsets of a family of space-frequency codes,¡¨ in 2009 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr 2009.
  9. C.-W. Shin, T.-H. Chang, W.-K. Ma, and C.-Y. Chi, ¡§A linear fractional semidefinite relaxed ML approach to blind detection of 16-QAM orthogonal space-time block codes,¡¨ in Proc. 2008 IEEE Intl. Conf. Commun., May 2008.
  10. W.-K. Ma, C.-C. Su, J. Jalden, and C.-Y. Chi, ¡§Some results on 16-QAM MIMO detection using semidefinite relaxation,¡¨ in 2008 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Mar. 2008.
  11. T.-H. Chan, W.-K. Ma, C.-Y. Chi, and Y. Wang, ¡§Blind separation of non-negative sources by convex analysis: Effective method by linear programming,¡¨ in 2008 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Mar. 2008.
  12. X. Chen, C.-Y. Chi, C.-W. Lin, W.-K. Ma, S. Zhou, and Y. Yao, ¡§A blind post-FFT user-by-user beamforming algorithm for multiuser OFDM systems,¡¨ in CHINACOM2007, Aug. 2007.
  13. C.-H. Peng, K.-C. Huang, C.-Y. Chi, W.-K. Ma, and T.-H. Tsai, ¡§A block-by-block blind post-FFT beamforming algorithm for multiuser OFDM systems based on subcarrier averaging,¡¨ in SPAWC2007, June 2007.
  14. T.-H. Tsai, X. Chen, C.-Y. Chi, W.-K. Ma, S. Zhou, & Y. Yao, ¡§Subcarrier average based block-by-block blind channel estimation algorithm for multi-user OFDM systems,¡¨ in SPAWC2007, June 2007.
  15. W.-K. Ma, ¡§Nonintersecting subspace OSTBCs for blind ML detection,¡¨ in 2007 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr. 2007.
  16. T.-H. Chan, W.-K. Ma, C.-Y. Chi, and Y. Wang, ¡§A Convex analysis based criterion for blind separation of non-negative sources,¡¨ in 2007 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr. 2007.
  17. T.-H. Chang, W.-K. Ma, and C.-Y. Chi, ¡§Semiblind ML OSTBC-OFDM detection in block fading channels,¡¨ in 2007 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr. 2007.
  18. K. W. Chan, H. C. So, and W.-K. Ma, ¡§A Novel subspace approach for wireless sensor network positioning with range measurements,¡¨ in 2007 IEEE Intl. Conf. Acoustic, Speech, and Signal Processing, Apr. 2007.
  19. T.-H. Chang, W.-K. Ma, and C.-Y. Chi, "Group-wise blind OFDM ML detection for complexity reduction," in Proc. 2006 European Signal Processing Conference, Sept. 2006.
  20. A. Pasha, B.-N. Vo, H. D. Tuan, and W.-K. Ma, "Closed form PHD filtering for linear jump Markov models," in Proc. 9th International Conference on Information Fusion, July 2006. (won the Best Student Paper Contest)
  21. W.-K. Ma, C.-Y. Chi, and P. C. Ching, "Extended differential unitary space-time modulation: A noncoherent scheme with error penalty less than 3dB," Proceedings of 2006 IEEE International Conference on Acoustic, Speech, and Signal Processing, Toulouse, May 2006.
  22. B.-N. Vo and W.-K. Ma, "A closed-form solution for the probability hypothesis density filter," The 8th International Conference on Information Fusion, Philadelphia, July 2005.
  23. W.-K. Ma, B.-N. Vo, T.N. Davidson, "On implementing the blind ML receiver for orthogonal space-time block codes," Proceedings of 2005 IEEE International Conference on Acoustic, Speech, and Signal Processing, March 2005.
  24. B.-N. Vo, W.-K. Ma, and S. Singh, "Localizing an unknown time-varying number of speakers: A random finite set approach," Proceedings of 2005 IEEE International Conference on Acoustic, Speech, and Signal Processing, March 2005.
  25. J. Jalden, B. Ottersten, and W.-K. Ma, "Reducing the average complexity of ML detection using semidefinite relaxation," Proceedings of 2005 IEEE International Conference on Acoustic, Speech, and Signal Processing, March 2005.
  26. B.N. Vo and W.-K. Ma, "Joint detection and tracking of multiple maneuvering targets using random finite sets," Proceedings of 8th International Conference on Control, Automation, Robotics and Vision, December 2004.
  27. W.-K. Ma, P.C. Ching, T.N. Davidson, and B.-N. Vo, "Blind symbol identifiability of orthogonal space-time block codes," Proceedings of 2004 IEEE International Conference on Acoustic, Speech, and Signal Processing, May 2004.
  28. K.W. Cheung, W.-K. Ma, and H.C. So, "Accurate approximation algorithm for TOA-based maximum likelihood mobile location using semidefinite programming," Proceedings of 2004 IEEE International Conference on Acoustic, Speech, and Signal Processing, May 2004.
  29. B.-N. Vo, S. Singh, and W.-K. Ma, "Tracking multiple speakers using random sets," Proceedings of 2004 IEEE International Conference on Acoustic, Speech, and Signal Processing, May 2004.
  30. W. Zhang, X.-G. Xia, P.C. Ching, and W.-K. Ma, "On the number of pilots for OFDM system in multipath fading channels," Proceedings of 2004 IEEE International Conference on Acoustic, Speech, and Signal Processing, May 2004.
  31. W.-K. Ma, P.C. Ching, T.N. Davidson, and X.-G. Xia, "Blind maximum-likelihood decoding for orthogonal space-time block codes: a semidefinite relaxation approach," Proceedings of IEEE 2003 Global Communications Conference, December 2003.
  32. W.-K. Ma, P.C. Ching, and Z. Ding, "Efficient relaxed maximum-likelihood M-ary PSK multiuser detection using semidefinite programming," 4th IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, June 2003.
  33. W.-K. Ma and P.C. Ching, "Robust interference suppression and blind speech beamforming in room reverberant environments," Proceedings of 2003 IEEE International Conference on Acoustic, Speech, and Signal Processing, April 2003.
  34. K.W. Cheung, H.C. So, W.-K. Ma, and Y.T. Chan, "Received signal strength mobile positioning via constrained weighted least squares," Proceedings of 2003 IEEE International Conference on Acoustic, Speech, and Signal Processing, April 2003.
  35. W.-K. Ma, T.N. Davidson, K.M. Wong, and P.C. Ching, "Multiuser detection for asynchronous CDMA using block coordinate ascent and semi-definite relaxation," Proceedings of 2002 IEEE International Conference on Acoustic, Speech, and Signal Processing, May 2002.
  36. W.-K. Ma, T.N. Davidson, K.M. Wong, Z.Q. Luo and P.C. Ching, "Efficient quasi-maximum-likelihood multiuser detection by semi-definite relaxation," Proceedings of 2001 IEEE Conference on Communications, vol. 1, pp. 6-10, 2001.
  37. W.-K. Ma, T.N. Davidson, K.M. Wong, Z.Q. Luo, and P.C. Ching, "An efficient quasi-maximum-likelihood multiuser detector using semi-definite relaxation," Proceedings of 2001 3rd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, pp. 186-189, 2001.
  38. W.-K. Ma, K.M. Wong, and P.C. Ching, "Maximum likelihood detection for multicarrier systems employing non-orthogonal pulse shapes," Proceedings of 2000 IEEE International Conference on Acoustic, Speech, and Signal Processing, vol. 5, pp. 2489-2492, 2000.
  39. W.-K. Ma, K.M. Wong, and P.C. Ching, "Performance analysis of maximum-likelihood detectors for non-orthogonal multiuser signals," Proceedings of 1999 2nd IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, pp. 25-28, 1999.
  40. H.C. So, W.-K. Ma, and Y.T. Chan, "Detection of narrowband random signals via spectrum matching," Proceedings of 1998 Midwest Symposium on Circuits and Systems, pp. 238-241, 1999.
  41. W.-K. Ma and Y.T. Zhang, "Optimum estimation and detection of distortion product otoacoustic emissions in white Gaussian noise," Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, vol. 3, pp. 1649-1652, 1998.

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