Publications:
 

Book:

1.     W. Liu and S. Weiss, "Wideband Beamforming: Concepts and Techniques", ISBN: 978-0-470-71392-1, John Wiley & Sons, March 2010.

Book Chapters:

1.     A. Zaitcev, G. Cook, W. Liu, M. Paley, and E. Milne, “Source Localization for Brain-Computer Interfaces” in the book “Brain-Computer Interfaces: Current Trends and Applications’’, edited by   A. E. Hassanien and A. T. Azar, Springer-Verlag, Germany, pp. 125-153, vol. 74, 2015.

2.     M. Paley, S. Kaka, H. Hilliard, A. Zaitcev, A. Bucur, S. Reynolds, W. Liu, E. Milne, G. Cook, “Advanced fMRI and the Brain Computer Interface” in the book “Brain-Computer Interfaces: Current Trends and Applications’’, edited by   A. E. Hassanien and A. T. Azar, Springer-Verlag, Germany, pp. 185-213, vol. 74, 2015.

3.     B. Peng and W. Liu, “Subband-Based Blind Source Separation and Permutation Alignment” in the book “Blind Source Separation: Advances in Theory, Algorithms and Applications”, edited by G. Naik and W. Wang, Springer-Verlag, Germany, pp. 97-130, June 2014.

Journal papers:

1.     X. Lan, and W. Liu, “Fully Quaternion-Valued Adaptive Beamforming Based on Crossed-Dipole Arrays”, Electronics (MDPI), featured paper of the special issue “Smart Antennas and MIMO Communications”, to appear.

2.     W. Yang, J. Chen, W. Liu, and P. B. Wang, “Moving Target Azimuth Velocity Estimation for the MASA Mode Based on Sequential SAR Images”, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, to appear.

3.     W. Liu, “Channel Equalization and Beamforming for Quaternion-Valued Wireless Communication Systems”, Journal of the Franklin Institute, to appear.

4.     J. Wang, W. Zhang, and W. Liu, “Minimum Sensitivity Based Robust Beamforming with Eigenspace Decomposition”, Multidimensional Systems and Signal Processing, to appear.

5.     H. Chen, C. P. Hou, W. P. Zhu, W. Liu, Y. Y. Dong, and Q. Wang, “ESPRIT-like Two-dimensional Direction Finding for Mixed Circular and Strictly Noncircular Sources Based on Joint Diagonalization”, Signal Processing (Elsevier), vol.141, pp. 48-56, December 2017.

6.     M. B. Hawes, L. Mihaylova, and W. Liu, “Location and Orientation Optimisation for Spatially Stretched Tripole Arrays Based on Compressive Sensing”, IEEE Transactions on Signal Processing, vol. 65, issue 9, pp. 2411-2420, May 2017.

7.     Y. Y. Dong, C. X. Dong, W. Liu, H. Chen, and G. Q. Zhao, “2-D DOA Estimation for L-shaped Array with Array Aperture and Snapshots Extension Techniques”, IEEE Signal Processing Letters, vol. 24, issue: 4, pp. 495-499, April 2017.

8.     J. J. Cai, W. Liu, R. Zong, and Q. Shen, “An Expanding and Shift Scheme for Constructing Fourth-Order Difference Co-Arrays”, IEEE Signal Processing Letters, vol. 24, issue 4, pp. 480-484, April 2017.

9.     B. Zhang, W. Liu, and X. Gou, “Compressive Sensing Based Sparse Antenna Array Design for Directional Modulation”, IET Microwaves, Antennas & Propagation, Volume: 11, Issue: 5, pp. 634-641, April 2017.

10. W. Yang, X. C. Ma, W. Liu, and J. Chen, “Spaceborne SAR Attitude Steering Method for Smart Imaging Mode”, Electronics Letters, vol. 53, issue 6, pp.428-430, March 2017.

11. Q. Shen, W. Liu, W. Cui, S. L. Wu, Y. M. Zhang, and M. Amin, “Focused Compressive Sensing for Underdetermined Wideband DOA Estimation Exploiting High-Order Difference Co-Arrays”, IEEE Signal Processing Letters, vol. 24, issue 1, pp. 86-90, January 2017.

12. J. Chen, K. Wang, W. Yang, and W. Liu, “Accurate Reconstruction and Suppression for Azimuth Ambiguities in Spaceborne Stripmap SAR Image”, IEEE Geoscience and Remote Sensing Letters, vol. 14, issue 1, pp. 102-106, January 2017.

13. Q. Shen, W. Cui, W. Liu, S. L. Wu, Y. M. Zhang, and M. Amin, “Underdetermined Wideband DOA Estimation of Off-Grid Sources Employing the Difference Co-Array Concept”, Signal Processing (Elsevier), vol. 130, pp. 299-304, January 2017.

14. W. Yang, J. Chen, H. C. Zeng, P. B. Wang, and W. Liu, “A Wide-swath Spaceborne TOPS SAR Image Formation Algorithm Based on Chirp Scaling and Chirp-Z Transform”, Sensors (MDPI), vol. 16, pp. 2095(17), December 2016.

15. Q. Shen, W. Liu, W. Cui, and S. L. Wu, “Underdetermined DOA Estimation under the Compressive Sensing Framework: A Review”, IEEE Access, vol. 4, pp. 8865-8878, November 2016.

16. Q. Q. Feng, H. P. Xu, Z. F. Wu, Y. You, W. Liu, and S. Ge, “Improved Goldstein Interferogram Filter Based on Local Fringe Frequency Estimation”, Sensors (MDPI), vol. 16, issue 11, pp. 1976(17), November 2016.

17. J. T. Li, H. P. Xu, L. Shan, W. Liu, and G Z. Chen, “An Efficient Compressive Sensing Based PS-DInSAR Method for Surface Deformation Estimation”, Measurement Science and Technology, vol. 27, no. 11, pp. 114001, November 2016.

18. J. Chen, H. Kuang, W. Yang, W. Liu, and P. B. Wang, “A Novel Imaging Algorithm for Focusing High- Resolution Spaceborne SAR Data in Squinted Sliding-Spotlight Mode”, IEEE Geoscience and Remote Sensing Letters,   vol. 13, issue 10, pp. 1577-1581, October 2016.

19. X. M. Gou, Z. W. Liu, W. Liu and Y. G. Xu, “Filtering and Tracking with Trinion-Valued Adaptive Algorithms”, Frontiers of Information Technology & Electronic Engineering, vol. 17, issue 8, pp. 834-840, August 2016.

20. Q. Shen, W. Liu, W. Cui, and S. L. Wu, “Extension of Co-Prime Arrays Based on the Fourth-Order Difference Co-Array Concept”, IEEE Signal Processing Letters, vol. 23, issue 5, pp. 615-619, May 2016.

21. H. C. Zeng, P. B. Wang, J. Chen, W. Liu, L. L. Ge, and W. Yang, “A Novel General Imaging Formation Algorithm for GNSS-Based Bistatic SAR”, Sensors (MDPI), vol. 16, number 3, pp. 294(15), 2016.

22. J. Chen, W. Guo, Z. Li, and W. Liu, “Optimized Limit for Polarimetric Calibration of Fully-Polarized SAR Systems”, Electronics Letters, vol. 52, issue 9, pp. 763-764, 2016.

23. H. Chen, C. P. Hou, W. Liu, W. P. Zhu, and M.N.S. Swamy, “Efficient Two-Dimensional Direction of Arrival Estimation for a Mixture of Circular and Noncircular Sources”, IEEE Sensors Journal, vol. 16, no. 8, pp. 2527-2536, April 2016.

24. M. D. Jiang, W. Liu, and Y. Li, “Adaptive Beamforming for Vector-Sensor Arrays Based on Reweighted Zero-Attracting Quaternion-Valued LMS Algorithm”, IEEE Transactions on Circuits and Systems II, vol. 63,  Issue 3, pp. 274-278, March 2016.

25. M. D. Jiang, Y. Li, and W. Liu, “Properties of a General Quaternion-Valued Gradient Operator and Its Application to Signal Processing”, Frontiers of Information Technology & Electronic Engineering, vol. 17, issue 2, pp. 83-95, February 2016.

26. Z. Y. Zhang, W. Liu, W. Leng, A. G. Wang, and H. P. Shi, “Interference-plus-Noise Covariance Matrix Reconstruction via Spatial Power Spectrum Sampling for Robust Adaptive Beamforming”, IEEE Signal Processing Letters, vol. 23, no. 1, pp. 121-125, January, 2016.

27. M. B. Hawes, W. Liu, and L. Mihaylova, “Compressive Sensing Based Design of Sparse Tripole Arrays”, Sensors (MDPI), vol. 2015, no. 12, pp. 31056-31068, December 2015.

28. H. Wu, C. P. Hou, H. Chen, W. Liu and Q. Wang, “Direction Finding and Mutual Coupling Estimation for Uniform Rectangular Arrays”, Signal Processing (Elsevier), vol. 117, pp. 61-68, December 2015.

29. H. P. Xu, Z. F. Wu, W. Liu, J. W. Li, and Q. Q. Feng, “Analysis of the Effect of Interference on InSAR”, IEEE Sensors Journal, vol. 15, no. 10, pp. 5659-5668, October 2015.

30. J. Shi, Y. Liu, W. Liu, and X. L. Zhang, “High-resolution SAR Based on IEEE 802.11 Protocol”, Electronics Letters, vol. 51, issue 22, pp. 1815-1817, October 2015.

31. Z. F. Wu, H. P. Xu, J. W. Li, and W. Liu, “Research of 3-D Deceptive Interfering Method for Single-Pass Spaceborne InSAR”, IEEE Trans. on Aerospace and Electronic Systems, vol. 51, issue 4, pp. 2834-2846, October 2015.

32. W. S. Guo, B. Li, S. Y. Wang, and W. Liu, “Molecular Communications with Longitudinal Carrier Waves: Baseband to Passband Modulation”, IEEE Communications Letters, vol. 19, issue 9, pp. 1512 – 1515, September 2015.

33. Q. Shen, W. Liu, W. Cui, S. L. Wu, Y. M. Zhang, and M. Amin, “Low-Complexity Direction-of-Arrival Estimation Based on Wideband Co-Prime Arrays”, IEEE Trans. Audio, Speech and Language Processing,  vol. 23, no. 9, pp. 1445–1456, Sep. 2015.

34. H. Kuang, J. Chen, W. Yang, and W Liu, “An Improved Imaging Algorithm for Spaceborne MAPs Sliding Spotlight SAR with High-Resolution Wide-Swath Capability”, Chinese Journal of Aeronautics, vol. 28, issue. 4, pp. 1178-1188, August 2015.

35. X. R. Zhang, Z. W. Liu, Y. G. Xu, and W. Liu, “Adaptive Tensorial Beamformer Based on Electromagnetic Vector-sensor Arrays with Coherent Interferences”, Multidimensional Systems and Signal Processing, vol. 26, issue 3, pp803-821, July 2015.

36. Z. F. Wu, H. P. Xu, J. W. Li, and W. Liu, “A Passive Interfering Method for InSAR Based on Circularly Moving Strong Scatterers”, IEEE Trans. on Aerospace and Electronic Systems, vol. 51, issue 3, pp. 1877-1890, July 2015. 

37. L. Zhang, W. Liu, A. Quddus, M. Dianati, and R. Tafazolli, “Adaptive Distributed Beamforming for Relay Networks based on Local Channel State Information”, IEEE Trans. on Signal and Information Processing over Networks, vol. 1, issue 2, pp. 117-128, June 2015.

38. J. C. Li, J. Chen, W. Liu, P. B. Wang, C. S. Li, “A Synthetic Bandwidth Method for High-Resolution SAR Based on PGA in the Range Dimension”, Sensors (MDPI), vol. 15, no. 7, pp. 15339-15362, 2015.

39. M. Hawes, and W. Liu, “Design of Fixed Beamformers Based on Vector-Sensor Arrays”, International Journal of Antennas and Propagation, vol. 2015, 2015.

40. P. B. Wang, W. Liu, J. Chen, W. Yang, and Y. Han, “A Higher-Order Nonlinear Chirp Scaling Algorithm for Medium Earth Orbit SAR”, Journal of Applied Remote Sensing, pp. 096084-(1-13), vol. 9, 2015.

41. P. B. Wang, W. Liu, J. Chen, M. Niu, and W. Yang, “A High-Order Imaging Algorithm for High-Resolution Space-Borne SAR Based on a Modified Equivalent Squint Range Model”, IEEE Trans. Geoscience and Remote Sensing, vol. 53, issue 3, pp. 1225-1235, March 2015.

42. H. C. Zeng, J. Chen, W. Liu, and W. Yang, “Modified Omega-k Algorithm for High-Speed Platform Highly-Squint Staggered SAR Based on Azimuth Non-Uniform Interpolation”, Sensors (MDPI), vol. 15, pp. 3750-3765, February 2015.

43. P. B. Wang, W. Liu, J. Chen, Z. R. Men, “A Raster Scan SAR System for Ultra-wide Swath Imaging”, Remote Sensing Letters, vol. 5, issue 9, pp. 833-842, 2014.

44. H. P. Xu, W. Chen, W. Liu, and S. Li, “Phase Statistics for Strong Scatterers in SAR Interferograms”, IEEE Geoscience and Remote Sensing Letters, vol. 11, pp. 1966-1970, November 2014.

45. X. R. Zhang, W. Liu, Y. G. Xu, and Z. W. Liu, “Quaternion-valued Robust Adaptive Beamformer for Electromagnetic Vector-sensor Arrays with Worst-case Constraint”, Signal Processing (Elsevier), vol. 104, pp. 274-283, November 2014.

46. W. Zhang, W. Liu, J. Wang and S. L. Wu, "Computationally Efficient 2-D DOA Estimation for Uniform Rectangular Arrays", Multidimensional Systems and Signal Processing, vol. 25, Issue 4, pp 847-857, October 2014.

47. M. Hawes and W. Liu, “Sparse Array Design for Wideband Beamforming with Reduced Complexity in Tapped Delay-lines”, IEEE Trans. Audio, Speech and Language Processing, vol. 22, issue 8, pp. 1236-1247, August 2014.

48. M. Hawes and W. Liu, “Compressive Sensing Based Approach to the Design of Linear Robust Sparse Antenna Arrays with Physical Size Constraint”, IET Microwaves, Antennas & Propagation, vol. 8, issue 10, pp. 736-746, July 2014.

49. W. Zhang, W. Liu, J. Wang and S. L. Wu, “Joint Transmission and Reception Diversity Smoothing for Direction Finding of Coherent Targets in MIMO Radar”, IEEE Journal of Selected Topics in Signal Processing, vol. 8, no.1, pp. 115—124, February 2014.

50. Y. G. Xu, J. Y. Ma, Z. W. Liu and W. Liu, “ A Class of Diagonally Loaded Robust Capon Beamformers for Noncircular Signals of Interest”, Signal Processing (Elsevier), vol. 94, pp. 670-680, January 2014.

51. B. Peng, W. Liu and D. P. Mandic, "Design of Oversampled Generalized Discrete Fourier Transform Filter Banks for Application to Subband Based Blind Source Separation", IET Signal Processing, vol. 7,  issue 9, pp. 843-853, December 2013.

52. L. Zhang, W. Liu, and J. Li, “Low-complexity Distributed Beamforming for Relay Networks with Real-valued Implementation”, IEEE Trans. Signal Processing, vol. 61, no. 20, pp. 5039-5048, October 2013.

53. A. H. Jafari, W. Liu and D. R. Morgan, "Study of Sensor Positions for Broadband Beamforming", IEEE Signal Processing Letters, vol. 20, issue 8, pp. 779-782, August 2013.

54. Y. Zhao and W. Liu, "Robust Fixed Frequency Invariant Beamformer Design Subject to Norm-bounded Errors", , IEEE Signal Processing Letters, vol. 20, issue 2, pp. 169-172, February 2013.

55. M. Hawes and W. Liu, "Location Optimisation of Robust Sparse Antenna Arrays with Physical Size Constraint", IEEE Antennas and Wireless Propagation Letters, vol. 11, pp. 1303-1306, 2012.

56. L. Zhang and W. Liu, "Robust Beamforming for Coherent Signals Based on the Spatial-Smoothing Technique", Signal Processing (Elsevier), vol. 92, issue 11, pp. 2747-2758, November 2012.

57. W. Liu, "Wideband Beamforming for Multipath Signals Based on Frequency Invariant Transformation", International Journal of Automation and Computing, vol. 9, issue 4, pp. 420-428, August 2012.

58. Y. Zhao and W. Liu, "Robust Wideband Beamforming with Frequency Response Variation Constraint Subject to Arbitrary Norm-bounded Error", IEEE Trans. Antennas and Propagation, vol. 60, no. 5, pp. 2566-2571, May 2012.

59. Y. Liao, W. Liu, X. Yan and J. Qi, "Design of Near-Field Circular Antenna Arrays Based on Convex Optimization'',  International Journal of Digital Content Technology and its Applications, vol. 6, no. 2, pp. 18-26, February 2012.

60. B. Peng, W. Liu and D. P. Mandic, "Reducing Permutation Error in Subband-Based Convolutive Blind Separation", IET Signal Processing, vol. 6, issue 1, pp. 34-44, February 2012.

61. L. Zhang, W. Liu and B. Peng, "The Generalized Eigenvector Problem for Hermitian Toeplitz Matrices and Its Application to Beamforming", Signal Processing (Elsevier), vol. 92, issue 2, pp. 374-380, February 2012.

62. L. Zhang and W. Liu, "Robust Forward Backward Based Beamformer for a General-Rank Signal Model with Real-Valued Implementation", Signal Processing (Elsevier), Volume 92, Issue 1, pp. 163-169, January 2012.

63. W. Liu, "Design and Implementation of a Rectangular frequency Invariant Beamformer with a Full Azimuth Angle Coverage", Journal of the Franklin Institute, vol. 348, no. 9, pp. 2556-2569, November 2011.

64. Y. Zhao, W. Liu and R. J. Langley, "Application of the Least Squares Approach to Fixed Beamformer Design with Frequency Invariant Constraints", IET Signal Processing, vol. 5, issue 3, pp. 281-291, June 2011.

65. L. Zhang, W. Liu and L. Yu, "Performance Analysis for Finite Sample MVDR Beamformer with Forward Backward Processing", IEEE Trans. Signal Processing, vol. 59, issue. 5, pp. 2427-2431, May 2011.

66. Y. Zhao, W. Liu and R. J. Langley, "Adaptive Wideband Beamforming with Frequency Invariance Constraints", IEEE Trans. Antennas and Propagation, vol. 59, issue 4, pp. 1175-1184, April 2011.

67. Y. Zhao, W. Liu and R. J. Langley, "Subband Design of Fixed Wideband Beamformers Based on the Least Squares Approach", Signal Processing (Elsevier), vol. 91, issue 4, pp. 1060-1065, April 2011

68. L. Zhang, W. Liu and R. J. Langley, "Adaptive Beamforming with Real-Valued Coefficients Based on Uniform Linear Arrays", IEEE Trans. Antennas and Propagation, vol. 59, issue 3, pp. 1047-1053, March 2011.

69. W. Liu, "Blind Adaptive Wideband Beamforming for Circular Arrays Based on Phase Mode Transformation", Digital Signal Processing, vol. 21, issue 2, pp. 239-247, March 2011.

70. L.  Yu, W. Liu and R. J. Langley, "SINR Analysis of the Subtraction-Based SMI Beamformer”, IEEE Trans. Signal Processing, vol. 58, issue 11, pp. 5926-5932, November 2010.

71. L. Zhang, W. Liu and R. J. Langley, "A Class of Constant Modulus Algorithms for Uniform Linear Arrays with a Conjugate Symmetric Constraint", Signal Processing (Elsevier), vol. 90, issue 9, pp. 2760-2765, September 2010.

72. L. Yu, W. Liu and R. J. Langley, "Novel robust beamformers for coherent interference suppression with DOA estimation errors", IET Microwaves, Antennas & Propagation, volume 4, issue 9, pp. 1310-1319, September 2010.

73. L. Zhang, W. Liu and R. J. Langley, "A Class of Constrained Adaptive Beamforming Algorithms Based on Uniform Linear Arrays", IEEE Trans. Signal Processing, vol. 58, no. 7, pp. 3916-3922, July 2010.

74. L. Yu, W. Liu and R. J. Langley, "Robust Beamforming Methods for Multipath Signal Reception ", Digital Signal Processing (Elsevier), vol. 20, issue 2, pp. 379-390, March 2010.

75. N. Lin, W. Liu and R. J. Langley, "Performance Analysis of an Adaptive Broadband Beamformer Based on a Two-Element Linear Array with Sensor Delay-Line Processing", Signal Processing (Elsevier), vol. 90, issue 1, pp. 269-281, January 2010.

76. W. Liu and R. J. Langley, "An Adaptive Wideband Beamforming Structure with Combined Subband Decomposition", IEEE Trans. Antennas and Propagation, vol. 57, no. 7, pp. 2204-2207, July 2009.

77. W. Liu and S. Weiss, "Off-broadside Main Beam Design and Subband Implementation for a Class of Frequency Invariant Beamformers", Signal Processing (Elsevier), vol. 89, issue 5, pp. 913-920, May 2009.

78. W. Liu and S. Weiss, "Beam Steering for Wideband Arrays", Signal Processing (Elsevier), vol. 89, issue 5, pp. 941-945, May 2009.

79. W. Liu, "Adaptive Wideband Beamforming with Sensor Delay-Lines", Signal Processing (Elsevier), vol. 89, issue 5, pp. 876-882, May 2009.

80. W. Liu, D. McLernon and M. Ghogho, "Design of Frequency Invariant Beamformer without Temporal Filtering", IEEE Trans. Signal Processing, vol. 57, no. 2, pp. 798-802, February 2009.

81. W. Y. Leong, W. Liu and D. P. Mandic, "Blind Source Extraction: Standard Approaches and Extensions to Noisy and Post-Nonlinear Mixing", Neurocomputing, vol. 71, pp. 2344-2355, June 2008.

82. W. Liu and S. Weiss, "Design of Frequency Invariant Beamformers for Broadband Arrays", IEEE Trans. Signal Processing, vol. 56, no. 2, pp. 855-860, February 2008.

83. W. Liu, R. Wu and R. J. Langley, "Design and Analysis of Broadband Beamspace Adaptive Arrays", IEEE Trans. Antennas and Propagation, vol. 55, no. 12, pp.3413-3420, December 2007.

84. W. Liu, S. Weiss, J. G. McWhirter and I. K. Proudler, "Frequency Invariant Beamforming for Two-Dimensional and Three-Dimensional Arrays", Signal Processing (Elsevier), vol. 87, issue 11, pp. 2535-2543, November 2007.

85. W. Liu, D. P. Mandic and A. Cichocki, “Analysis and Online Realization of the CCA Approach for Blind Source Separation”, IEEE Trans. Neural Networks, vol. 18, no. 5, pp. 1505-1510, September 2007.

86. W. Liu, D. P. Mandic and A. Cichocki, "Blind Source Extraction Based on a Linear Predictor", IET Signal Processing, vol. 1, no. 1, pp. 29-34, March 2007.

87. W. Liu, D. P. Mandic and A. Cichocki, “Blind Second-order Source Extraction of Instantaneous Noisy Mixtures”, IEEE Trans. Circuits and Systems II, vol. 53, no. 9, pp. 931--935, September 2006.

88. W. Liu and D. P. Mandic, “A Normalised Kurtosis Based Algorithm for Blind Source Extraction from Noisy Measurements”, Signal Processing (Elsevier), vol. 86, no. 7, pp. 1580-1585, July 2006.

89. W. Liu, S. Weiss, and L. Hanzo, “A Generalised Sidelobe Canceller Employing Two-dimensional Frequency Invariant Filters”, IEEE Trans. Antennas and Propagation, vol. 53, issue 7, pp. 2339-2343, July 2005.

90. W. Liu, S. Weiss, and L. Hanzo, "A Subband-selective Broadband GSC with Cosine-modulated Blocking Matrix", IEEE Trans. Antennas and Propagation, vol. 52, no. 3, pp. 813-820, March 2004.

91. W. Liu, S. Weiss, and L. Hanzo, "A Novel Method for Partially Adaptive Broadband Beamforming", Journal of VLSI Signal Processing, vol. 33, issue 3, pp. 337-344, March 2003.

92. S.C. Chan, W. Liu and K.L. Ho, "Multiplier-less perfect reconstruction modulated filter banks with sun-of-powers-of-two coefficients", IEEE Signal Processing Letter, vol. 8, pp.163-166, June 2001.

93. J. S. Mao, S. C. Chan, W. Liu and K. L. Ho, "Design and Multiplier-less Implementation of A Class of Two-Channel PR FIR Filter Banks and Wavelets with low System Delay", IEEE Trans. Signal Processing, vol. 40, pp. 3379-3394, December 2000.

Conference papers:

1.     Raza, W. Liu, and Q. Shen, “Thinned Coprime Arrays for DOA Estimation”, Proc. of the European Signal Processing Conference (EUSIPCO), Kos, Greece, August 2017.

2.     M. R. Anbiyaei, W. Liu, and D. C. McLernon, “Performance Improvement for Wideband Beamforming with White Noise Reduction Based on Sparse Arrays”, Proc. of the European Signal Processing Conference (EUSIPCO), Kos, Greece, August 2017.

3.     J. X. Ma, and W. Liu, “A Distributed Iterative Transceiver Beamforming Algorithm for Multipair Two-Way Relay Networks”, Proc. of the 22nd International Conference on Digital Signal Processing (DSP 2017), London, UK, August 2017.

4.     X. Lan, W. Liu, and Y. T. Ngan, “Joint 4-D DOA and Polarization Estimation Based on Linear Tripole Arrays”, Proc. of the 22nd International Conference on Digital Signal Processing (DSP 2017), London, UK, August 2017.

5.     M. R. Anbiyaei, W. Liu, and D. C. McLernon, “White Noise Reduction for Wideband Beamforming Based on Uniform Rectangular Arrays”, Proc. of the 22nd International Conference on Digital Signal Processing (DSP 2017), London, UK, August 2017.

6.     H. Kuang, J. Chen, W. Yang, W. Liu, and X. Zhu, “Fully Three-dimensional UAV SAR Imaging with Multi-Azimuth-Angle Observation”, Proc. of the IEEE International Geoscience and Remote Sensing Symposium, Fort Worth, USA, July 2017.

7.     M. D. Jiang, W. Liu, and Y. Li, “Study of Wind Profile Prediction with a Combination of Signal Processing and Computational Fluid Dynamics”, Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), Baltmore, US, May 2017.

8.     H. Chen, C. P. Hou, W. P. Zhu, W. Liu, Y. Y. Dong, and Q. Wang, “Joint Diagonalization Based 2D DOA estimation for Mixed Circular and Strictly Noncircular Sources”, Proc. of the IEEE Radar Conference, Seattle, USA, May 2017.

9.     Z. Y. Zhang, W. Leng, A. G. Wang, W. Liu, and H. P. Shi, “Effective Estimation of the Desired-Signal Subspace and Its Application to Robust Adaptive Beamforming”, Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), New Orleans, USA, March 2017.

10. L. L. Wang, Y. T. Ngan,W. Liu, and H. C. Yung, “Anomaly Detection for Quaternion-valued Traffic Signals”, Proc. of International Conference on Digital Image Computing Techniques and Applications, Surfers Paradise, Australia, November 2016.

11. Z. C. Qi, and W. Liu, “Millimetre Wave Three-Dimensional Beam Tracking Based on Handset MEMS Sensors with Extended Kalman Filtering”, Proc. of Colloquium on Radio Propagation and Technologies for 5G, Duram, UK, October 2016.

12. F. X. Wen, and W. Liu, “CANDECOMP/PARAFAC Decomposition Based Multi-Dimensional Nonuniform Harmonic Retrieval”, Proc. of IEEE International Conference on Digital Signal Processing, Beijing, China, October 2016.

13. F. X. Wen, and W. Liu, “Iteratively Reweighted Optimum Linear Regression in the Presence of Generalized Gaussian Noise”, Proc. of IEEE International Conference on Digital Signal Processing, Beijing, China, October 2016.

14. F. X. Wen, and W. Liu, “Regularized LAD Algorithms for Sparse Time-Varying System Identification with Outliers”, Proc. of IEEE International Conference on Digital Signal Processing, Beijing, China, October 2016.

15. A. Raza, and W. Liu, “Critical Analysis of the Eigenfilter Method for the Design of FIR Filters and Wideband Beamformers”, Proc. of the 22nd International Conference on Automation and Computing (ICAC), Essex, UK, September 2016.

16. M. R. Anbiyaei, W. Liu, and D. C. McLernon, “Performance Improvement for Wideband DOA Estimation with White Noise Reduction Based on Uniform Linear Arrays”, Proc. IEEE 9th Sensor Array and Multichannel Signal Processing Workshop (SAM), Rio de Janeiro, Brazil, July 2016.

17. B. Zhang, W. Liu, and X. Gou, “Sparse Antenna Array Design for Directional Modulation”, Proc. IEEE 9th Sensor Array and Multichannel Signal Processing Workshop (SAM), Rio de Janeiro, Brazil, July 2016.

18. R. L. Chen, M. B. Hawes, L. Mihaylova, J. J. Xiao, and W. Liu, “Vehicle Logo Recognition by Spatial-SIFT Combined with Logistic Regression”, Proc. of the 19th International Conference on Information Fusion, Heidelberg, Germany, July 2016.

19. J. X. Ma, W. Liu, and J. Zhang, “Iterative Transceiver Beamformer Design for Multi-Pair Two-Way Distributed Relay Networks”, Proc. of the IEEE International Conference on Communications (ICC) Workshop on Cooperative and Cognitive Networks, Kuala Lumpur, Malaysia, May 2016.

20. Q. Shen, W. Liu, W. Cui, and S. L. Wu, “Extension of Nested Arrays with the Fourth-Order Difference Co-Array Enhancement”, Proc. of the International Conference on Acoustics, Speech and Signal Processing (ICASSP), Shanghai, China, March 2016.

21. X. Ma, Y. T. Ngan, and W. Liu, “Density-Based Outlier Detection by Local Outlier Factor on Large-Scale Traffic Video Data”, Proc. the Image Processing: Machine Vision Applications Conference of the IS&T International Symposium on Electronic Imaging (EI), San Francisco, US, February 2016.

22. L. Yu, Y. S. Wei, and W. Liu, “A Novel Adaptive Beamforming Technique for Large-Scale Arrays”, Proc. the 15th IEEE International Symposium on Signal Processing and Information Technology,  Abu Dhabi, UAE, December 2015.

23. L. Yu, Y. S. Wei, and W. Liu, “Adaptive Beamforming Based on Nonuniform Linear Arrays with Enhanced Degrees of Freedom”, Proc. the TENCON conference, Macau, China, November 2015.

24. C. Miller, W. Liu, and Richard Langley, “Reduced Complexity MIMO Receiver with Real-Valued Beamforming”, Proc. the 15th IEEE International Conference on Computer and Information Technology (CIT), Liverpool, UK, October 2015 (“Best Paper Award”).

25. F. Wen, and W. Liu, “Diffusion Least Mean Square Algorithms with Zero-Attracting Adaptive Combiners”, Proc. the 15th IEEE International Conference on Computer and Information Technology (CIT), Liverpool, UK, October 2015.

26. J. Shi, and W. Liu, “Bistatic ISAR Maneuvering Target Imaging via Differential Phase Fitting”, Proc. of the NATO Science and Technology Organisaion Specialists’ Meeting on Radar Imaging for Target Identification, Pisa, Italy, October 2015.

27. Q. Shen, W. Liu, W. Cui, S. L. Wu, Y. M. Zhang, and M. Amin, “Wideband DOA Estimation for Uniform Linear Arrays Based on the Co-Array Concept”, Proc. the ”, Proc. of the European Signal Processing Conference (EUSIPCO), Nice, France, September 2015.

28. Zaitcev, G. Cook, W. Liu, E. Milne, and M. Paley, “Feature Extraction for BCIs Based on Electromagnetic Source Localization and Multiclass Filter Bank Common Spatial Patterns”, Proc. the 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'15), Milano, Italy, August 2015.

29. T. Dang, Y. T. Ngan, and W. Liu, “Distance-Based k-Nearest Neighbors Outlier Detection Method in Large-Scale Traffic Data”, Proc. of the IEEE International Conference on Digital Signal Processing (DSP), Singapore, July 2015.

30. F. X. Wen, W. Liu, and X. C. Lu, “An Efficient Interpolation Based Two-Step Time Delay Estimation Method”, Proc. of the IEEE International Conference on Digital Signal Processing (DSP), Singapore, July 2015.

31. F. X. Wen, W. Liu, and X. C. Lu, “Distributed Expectation-Maximization Algorithm for DOA Estimation in Wireless Sensor Networks”, Proc. of the IEEE International Conference on Digital Signal Processing (DSP), Singapore, July 2015.

32. X. M. Gou, Z. W. Liu, W. Liu, and Y. G. Xu, “Three-Dimensional Wind Profile Prediction with Trinion-Valued Adaptive Algorithms”, Proc. of the IEEE International Conference on Digital Signal Processing (DSP), Singapore, July 2015.

33. J. X. Ma, W. Liu, and R. J. Langldy, “Filter-and-Forward Distributed Relay Beamforming for Cognitive Radio Systems”, Proc. the IEEE International Conference on Communications (ICC) Workshop on Cooperative and Cognitive Networks, London, UK, June 2015.

34. A. Zaitcev, G. Cook, W. Liu, E. Milne, and M. Paley, “Feature Extraction for BCIs Based on Electromagnetic Source Localization and Common Spatial Patterns”, Proc. the 9th European Conference on Antennas and Propagation (EuCAP), Lisbon, Portugal, April 2015.

35. J. Henshaw, W. Liu, and D. Romano, “Problem Solving Using Hybrid Brain-Computer Interface Methods: A Review”, Proc. the IEEE International Conference on Cognitive Infocommunications (CogInfoCom), pp. 215-219, Vietri sul Mare, Italy, November 2014.

36. A. Zaitcev, G. Cook, W. Liu, M. Paley, and E. Milne, “Application of Compressive Sensing for EEG Source Localization in Brain Computer Interfaces”, Proc. of the Loughborough Antennas & Propagation Conference (LAPC), Loughborough, UK, November 2014.

37. W. Liu, “Antenna Array Signal Processing for a Quaternion-Valued Wireless Communication System”, Proc. of the IEEE Benjamin Franklin Symposium on Microwave and Antenna Sub-systems (BenMAS), Philadelphia, US, September 2014.

38. M. Hawes, and W. Liu, “Sparse Vector Sensor Array Design Based on Quaternionic Formulations”, Proc. of the European Signal Processing Conference (EUSIPCO), Lisbon, Portugal, September 2014.

39.  D. Jiang, W. Liu, and Y. Li, “A General Quaternion-Valued Gradient Operator and Its Applications to Computational Fluid Dynamics and Adaptive Beamforming”, Proc. of the International Conference on Digital Signal Processing (DSP), Hong Kong, August 2014.

40. M. Hawes, and W. Liu, “A Quaternion-Valued Reweighted Minimisation Approach to Sparse Vector Sensor Array Design”, Proc. of the International Conference on Digital Signal Processing (DSP), Hong Kong, August 2014.

41. M. Hawes, and W. Liu, “Sparse Wideband Array Design with Reweighted Iterative Optimisation and Frequency Invariant Response”, Proc. of the International Conference on Digital Signal Processing (DSP), Hong Kong, August 2014.

42. Q. Shen, W. Liu, W. Cui, and S. L. Wu, “Low-Complexity Compressive Sensing Based DOA Estimation for Co-Prime Arrays”, Proc. of the International Conference on Digital Signal Processing (DSP), Hong Kong, August 2014.

43. Q. Shen, W. Liu, W. Cui, S. L. Wu, Y. M. Zhang, and M. Amin, “Group Sparsity Based Wideband DOA Estimation for Co-Prime Arrays”, Proc. of the IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP), Xi’an, China, July 2014.

44. M. D. Jiang, W. Liu, and Y. Li, “A Zero-attracting Quaternion-valued Least Mean Square Algorithm for Sparse System Identification”, Proc. of the 9th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), Manchester, UK, July 2014.

45. M. Hawes, and W. Liu, “Design of Low-complexity Wideband Beamformers with Temporal Sparsity”, Proc. of the 9th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP), Manchester, UK, July 2014.

46. M. Hawes, W. Liu and R. J. Langley, “Sparse Antenna Array Design via Compressive Sensing”, Proc. of the IET Colloquium on Antennas, Wireless and Electromagnetics, London, UK, May 2014.

47. M. D. Jiang, W. Liu, Y. Li and X. R. Zhang, “Frequency-Domain Quaternion-valued Adaptive Filtering and Its Application to Wind Profile Prediction”, Proc. of the IEEE TENCON conference, Xi’an, China, October 2013.

48. X. R. Zhang, Z. W. Liu, W. Liu and Y. G. Xu, “Quasi-vector-cross-product Based Direction Finding Algorithm with a Spatially Stretched Tripole”, Proc. of the IEEE TENCON conference, Xi’an, China, October 2013.

49. B. Qiu, W. Liu and R. B. Wu, “Blind Interference Suppression for Satellite Navigation Signals Based on Antenna Arrays”, Proc. of the IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP), Beijing, China, July 2013.

50. M. Hawes, and W. Liu, “Robust Sparse Antenna Array Design via Compressive Sensing”, Proc. of the International Conference on Digital Signal Processing (DSP), Santorini, Greece, July 2013.

51. M. Hawes, and W. Liu, “Sparse Microphone Array Design for Wideband Beamforming”, Proc. of the International Conference on Digital Signal Processing (DSP), Santorini, Greece, July 2013.

52. W. Zhang, W. Liu, J. Wang, and S. L. Wu, “DOA Estimation of Coherent Targets in MIMO Radar”, Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013.

53. X. R. Zhang, W. Liu, Y. G. Xu, and Z. W. Liu, “Quaternion-based Worst Case Constrained Beamformer Based on Electromagnetic Vector-sensor Arrays”, Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vancouver, Canada, May 2013.

54. W. Zhang, W. Liu, S. L. Wu and J. Wang, “Robust DOA Estimation for a MIMO Array Using Two Calibrated Transmit Sensors”, Proc. the IET International Radar Conference, Xi’an, China, April 2013 (“Excellent Paper Award”).

55. B. Peng, W. Liu and D. P. Mandic, “Subband-Based Joint Blind Source Separation for Convolutive Mixtures Employing M-CCA”, Proc.  the Constantinides International Workshop on Signal Processing, London, UK, January 2013.

56. W. Zhang, W. Liu, S. L. Wu and J. Wang, “Direction-of-arrival Estimation in Partially Calibrated Subarray-Based MIMO Arrays”, Proc.  the Constantinides International Workshop on Signal Processing, London, UK, January 2013.

57. L. Zhang and W. Liu, “Robust Beamforming for Coherent Signals in the Presence of Steering Vector and Correlation Matrix Errors”, Proc. the 7th International Conference on Communications and Networking in China (ChinaCom), Kunming, China, August 2012.

58. L. Zhang and W. Liu, “A Reference Signal Based Beamforming Scheme for Relay Networks with Local Channel State Information”, Proc. the 7th International Conference on Communications and Networking in China (ChinaCom), Kunming, China, August 2012 (invited paper).

59. W. Zhang and W. Liu, “Low-Complexity Blind Beamforming Based on Cyclostationarity”, Proc. of the European  Signal Processing Conference (EUSIPCO), Bucharest, Romania, August 2012.

60. L. Zhang and W. Liu, “A Class of Robust Adaptive Beamforming Algorithms for Coherent Interference Suppression”, Proc. of the European Signal Processing Conference (EUSIPCO), Bucharest, Romania, August 2012.

61. M. Hawes and W. Liu, “Pattern Synthesis of Linear Antenna Arrays Using a Genetic Algorithm with Physical Size Constraint”, Proc. the 6th European Conference on Antennas and Propagation (EuCAP), Prague, Czech, March 2012.

62. M. Hawes and W. Liu, “Location Optimisation of Robust Sparse Antenna Array”, Proc. of the International Workshop on Smart Antennas (WSA), pp. 343-346, Dresden, Germany, March 2012.

63. L. Zhang and W. Liu, “Low Complexity Robust Beamformer for General-Rank Signal Model Based on Uniform Linear Array”, Proc. of the  2nd Sensor Signal Processing for Defence (SSPD) Conference, London, UK, September 2011.

64. L. Zhang, W. Liu, and B. Peng, “Zero Location Study of the Beam Response of the Maximum Output SINR Beamformer”, Proc. of the  2nd Sensor Signal Processing for Defence (SSPD) Conference, London, UK, September 2011.

65. L. Yu and W. Liu, “Performance Analysis of the Data Subtraction Based Robust Beamformer”, Proc. of the  2nd Sensor Signal Processing for Defence (SSPD) Conference, London, UK, September 2011.

66. B. Peng, W. Liu and D. P. Mandic, “Novel Design of Oversampled GDFT Filter Banks for Application to Subband Based Blind Source Separation”, Proc. of the IEEEWorkshop on Statistical Signal Processing (SSP), pp. 637-640, Nice, France, June 2011.

67. Y. Zhao and W. Liu, “Robust Wideband Beamforming Based on Frequency Invariance Constraints with Norm-bounded Errors”, Proc. of the IEEE Workshop on Statistical Signal Processing (SSP), Nice, France, June 2011.

68. L. Zhang, W. Liu and L. Yu, “Statistical Analysis of the Finite Sample Forward-Backward MVDR Beamformer”, Proc. of the IEEE Workshop on Statistical Signal Processing (SSP), Nice, France, June 2011.

69. L. Zhang, W. Liu and R. J. Langley, “Low-Complexity Constant Modulus Algorithms for Blind Beamforming Based on Symmetrically Distributed Arrays”, Proc. of the IEEE Workshop on Statistical Signal Processing (SSP), Nice, France, June 2011.

70. W. Liu and D. R. Morgan, “A Spatial Filtering Approach to Electronic Wideband Beam Steering”, Proc. of the SPIE Defence, Security, and Sensing Symposium, Orlando, US, April 2011.

71. L. Zhang, W. Liu and R. J. Langley, “Low-complexity Narrowband Adaptive Beamforming Based on Symmetrically Distributed Arrays”, Proc. of the SPIE Defence, Security, and Sensing Symposium, Orlando, US, April 2011.

72. L. Zhang, W. Liu and R. J. Langley, "A Constrained Reference Signal Based Beamformer Based on Symmetrically Distributed Antenna Arrays", Proc. of the Loughborough Antennas and Propagation Conference (LAPC), Loughborough, UK, November 2010.

73. W. Liu, “Implementation of a Wideband Beamformer Based on a Rectangular Array with Spatial only Information”, Proc. of the European Signal Processing Conference (EUSIPCO), Aalborg, Denmark, August 2010.

74. Y. Zhao, W. Liu and R. J. Langley, "Adaptive Wideband Beamforming with Response Variation Constraints", Proc. of the European Signal Processing Conference (EUSIPCO), Aalborg, Denmark, August 2010.

75. Y. Liao and W. Liu, ''Near-field Beamformer Design for Circular MRI Antenna Arrays Based on MinMax Optimization'', Proc. of the International Conference on Signal Processing Systems (ICSPS), vol. 1, pp. 325-328,  Dalian, China, July 2010.

76. Y. X. Zou, B. Li and W. Liu, "A Broadband Speech Enhancement Technique Based on Frequency Invariant Beamforming and GSC", Proc. of the International Conference on Green Circuits and Systems (ICGCS), Shanghai, China, June 2010.

77. W. Liu, "Blind Beamforming for Multi-path Wideband Signals Based on Frequency Invariant Transformation", Proc. of the International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol, Cyprus, March 2010.

78. L. Zhang, W. Liu and R. J. Langley, “A Constrained Constant Modulus Algorithm Based on Uniform Linear Arrays”, Proc. of the International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol, Cyprus, March 2010.

79. Y. Zhao, W. Liu and R. J. Langley, “Robust Broadband Beamforming Based on Frequency Invariance Constraints and Worst-case Performance Optimization”, Proc. of the International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol, Cyprus, March 2010.

80. B. Peng, W. Liu and Danilo P. Mandic, “An Improved Solution to the Subband Blind Source Separation Permutation Problem Based on Optimized Filter Banks”, Proc. of the International Symposium on Communications, Control and Signal Processing (ISCCSP), Limassol, Cyprus, March 2010.

81. L. Zhang, W. Liu and R. J. Langley, “A Minimum Variance Beamformer with Linear and Quadratic Constraints Based on Uniform Linear Antenna Arrays”, Proc. of the Loughborough Antennas and Propagation Conference (LAPC), pp. 585-588, Loughborough, UK, November 2009.

82. W. Liu, ''A Novel Approach to Adaptive Beamforming for Multi-Path Broadband Signals'', Proc. of the IEEE Workshop on Statistical Signal Processing, pp. 197-200, Cardiff, UK, September 2009.

83. Y. Zhao, W. Liu and R. J. Langley, “Design of Frequency Invariant Beamformers in Subbands”, Proc. of the IEEE Workshop on Statistical Signal Processing, pp. 201-204, Cardiff, UK, September 2009.

84. L. Yu, W. Liu and R. J. Langley, “A Novel Robust Beamformer Based on Sub-array Data Subtraction for Coherent Interference Suppression”, Proc. of the IEEE Workshop on Statistical Signal Processing, pp. 525-528, Cardiff, UK, September 2009.

85. L. Yu, W. Liu and R. J. Langley, "Robust Beamforming with Combined Worst-Case Performance Optimization and Soft Constraints in a Multipath Environment", Proc. of the European Signal Processing Conference (EUSIPCO), pp. 583-586, Glasgow, Scotland, August 2009.

86. Y. Zhao, W. Liu and R. J. Langley, "A Least Squares Approach to the Design of Frequency Invariant Beamformers", Proc. of the European Signal Processing Conference (EUSIPCO), pp. 844-848, Glasgow, Scotland, August 2009.

87. W. Liu, “Design of a Rectangular Frequency Invariant Beamformer with a Full Azimuth Angle Coverage”, Proc. of the European Signal Processing Conference (EUSIPCO), pp. 579-582, Glasgow, Scotland, August 2009.

88. W. Liu, "Blind Adaptive Beamforming for Wideband Circular Arrays", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 2029-2032, Taipei, Taiwan, April 2009.

89. Y. Zhao, W. Liu and R. J. Langley, “An Eigenfiler Approach to the Design of Frequency Invariant Beamformers”, Proc. of the International Workshop on Smart Antennas (WSA), pp. 341-346, Berlin, Germany, February 2009.

90. Y. Zhao, W. Liu and R. J. Langley, “Efficient Design of Frequency Invariant Beamformers with Sensor Delay-Lines”, Proc. of the IEEE Sensor Array and Multi-Channel Signal Processing Workshop, pp. 335-339, Darmstadt, Germany, July 2008.

91. L. Yu, W. Liu and R. J. Langley, “Beamspace Adaptive Beamforming Based on Principle Component Analysis”, Proc. of the IEEE Sensor Array and Multi-Channel Signal Processing Workshop, pp. 325-329, Darmstadt, Germany, July 2008.

92. W. Liu and S. Weiss, “Broadband Beamspace Adaptive Beamforming with Spatial-only Information”, Proc. of the IEEE Sensor Array and Multi-Channel Signal Processing Workshop, pp. 330-334, Darmstadt, Germany, July 2008.

93. W. Liu. D. P. Mandic and A. Cichocki, ''A Dual-Linear Predictor Approach to Blind Source Extraction for Noisy Mixtures'', Proc. of the IEEE Sensor Array and Multi-Channel Signal Processing Workshop (SAM), pp. 515-519, Darmstadt, Germany, July 2008.

94. W. Liu, D. P. Mandic and A. Cichocki, ''Blind Source Separation Based on Generalised Canonical Correlation Analysis and Its Adaptive Realization'', Proc. of the International Congress on Image and Signal Processing (CISP),  pp. 417-421, Sanya, China, May 2008.

95. L. Yu, W. Liu and R. J. Langley, “A Robust Adaptive Beamformer for Multi-Path Signal Reception”, Proc. of the International Congress on Image and Signal Processing (CISP), pp. 34-38, Sanya, China, May 2008.

96. N. Lin, W. Liu and R. J. Langley, “Performance Analysis of a Two-Element Linearly Constrained Minimum Variance Beamformer with Sensor Delay-Line Processing”, Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 2601-2604, Las Vegas, Nevada, 30 March – 4 April 2008.

97. W. Liu and S. Weiss, “Off-broadside Main Beam Design for Frequency Invariant Beamformers”, Proc. of the International Workshop on Smart Antennas (WSA), pp. 190-194, Darmstadt, Germany, February 2008.

98. L. Yu, W. Liu and R. J. Langley, “Performance Comparison of Two Sets of Constraints in Multi-path Environment”, Proc. of the International Workshop on Smart Antennas (WSA), pp. 370-374, Darmstadt, Germany, February 2008.

99. W. Liu, "Adaptive Broadband Beamforming with Spatial-only Information", Proc. of the International Conference on Digital Signal Processing (DSP), pp. 575-578, Cardiff, UK, July 2007.

100.                 N. Lin, W. Liu and R. Langley, "Performance Analysis of a Broadband Beamforming Structure without Tapped Delay-Lines", Proc. of the International Conference on Digital Signal Processing (DSP), pp. 583-586, Cardiff, UK, July 2007.

101.                 L. Yu, W. Liu and R. Langley, "Robust Adaptive Beamforming for Multi-path Environment Based on Domain Weighted PCA", pp. 91-94, Proc. of the International Conference on Digital Signal Processing (DSP), Cardiff, UK, July 2007.

102.                 W. Liu, D. McLernon, M. Ghogho, "Frequency Invariant Beamforming without TDL", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 2, pp. 997-1000, Hawaii, Honolulu, April 2007.

103.                 W. Y. Leong, D. P. Mandic, Wei Liu,"Blind Extraction of Noisy Events Using Nonlinear Predictor", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 2, pp. 657-660, Hawaii, Honolulu, April 2007.

104.                 W. Liu and R. Langley, “Adaptive Wideband Beamforming with Combined Spatial/Temporal Subband Decomposition”, Proc. of the Progress in Electromagnetics Research Symposium (PIERS), pp. 1386-1391, Beijing, China, March 2007.

105.                 W. Liu and S. Weiss, “Design of Frequency Invariant Beamformer for Broadband Arrays”, Proc. of the IEEE International Workshop on Antenna Technology (iWAT), pp. 364-367, Cambridge, UK, March 2007.

106.                 L. Yu, N. Lin, W. Liu and R. Langley, “Bandwidth Performance of Linearly Constrained Minimum Variance Beamformers”, Prof. of the IEEE International Workshop on Antenna Technology (iWAT), pp. 327-330, Cambridge, UK, March 2007.

107.                 W. Liu, R. Wu, and R. Langley, “Beamspace Adaptive Beamforming for Broadband Planar Arrays”, Proc. of the IEEE International Workshop on Antenna Technology (iWAT), pp. 311-314, Cambridge, UK, March 2007.

108.                 W. Liu and D. P. Mandic: “A Normalised Kurtosis Based Blind Source Extraction Algorithm for Noisy Mixtures”, Proc. the International Conference on Acoustics, Speech and Signal Processing, pp. 641-644, Toulouse, France, May 2006.

109.                 W. Liu, D. P. Mandic and A. Cichocki, “An Analysis of the CCA Approach for Blind Source Separation and Its Adaptive Realization”, Proc. the IEEE International Symposium on Circuits and Systems (ISCAS), pp. 3590-3593, Island of Kos, Greece, May 2006.

110.                 W. Liu, D. P. Mandic and A. Cichocki, “Blind Source Extraction of Instantaneous Noisy Mixtures Using a Linear Predictor”, Proc. the IEEE International Symposium on Circuits and Systems (ISCAS), pp. 4199-4202, Island of Kos, Greece, May 2006.

111.                 W. Liu, R. Wu and R. Langley: “Analysis and a Novel Design of the Beamspace Broadband Adaptive Array”, Proc. of the Progress in Electromagnetics Research Symposium (PIERS), pp. 733-738, Cambridge, USA, March 2006.

112.                 C. L. Koh, W. Liu and S. Weiss: “A Comparison of Computational Approaches for Broadband Processing of Antenna Arrays”, Proc. of the IEE Conference on DSP Enabled Radio, pp. 28/1-28/7, University of Southampton, Southampton, UK, September 2005.

113.                 W. Liu and S. Weiss: “Design of Frequency-invariant Beamformers Employing Multi-dimensional Fourier Transforms”, Proc. of the Fourth International Workshop on Multidimensional (nD) Systems (NDS), pp. 19-23, Wuppertal, Germany, July 2005.

114.                 W. Liu, D. P. Mandic and A. Cichocki: “A Class of Novel Blind Source Extraction Algorithms Based on a Linear Predictor”, Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), pp. 3599-3602, Kobe, Japan, May 2005.

115.                 W. Liu, D. P. Mandic: “Semi-blind Source Separation for Convolutive Mixtures Based on Frequency Invariant Transformation”, Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 5, pp. 285-288, Philadelphia, USA, March 2005.

116.                 W. Liu, S. Weiss: “Frequency Invariant Beamforming in Subbands”, Proc. of the 38th Asilomar Conference on Signals, Systems, and Computers, vol. 2, pp. 1968-1972, Pacific Grove, USA, November 2004.

117.                 W. Liu, S. Weiss, and L. Hanzo: "A GSC Employing Two-dimensional Frequency Invariant Filters", Proc. of the IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), pp. 84-88, Barcelona, Spain, July 2004.

118.                 W. Liu, C. L. Koh and S. Weiss: "Constrained Adaptive Broadband Beamforming Algorithm in Frequency Domain", Proc. of the IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), pp. 94-98, Barcelona, Spain, July 2004.

119.                 W. Liu and S. Weiss: "A New Class of Broadband Arrays with Frequency-invariant Beam Patterns", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), pp. 185-188, Montreal, Canada, May 2004.

120.                 W. Liu, S. Weiss and L. Hanzo, “A Subband-selective Transform-domain GSC with Low Computational Complexity”, Proc. of the Postgraduate Research Conference in Electronics, Photonics, Communications and Software (PREP), pp. 31-32, Exeter University, UK, April 2003.

121.                 S. Weiss, R. W. Stewart and W. Liu, “A Broadband Adaptive Beamformer in Subbands with Scaled Aperture”, Proc. of the 36th Asilomar Conference on Signals, Systems, and Computers, pp. 1298-1302, Pacific Grove, CA, USA, November 2002.

122.                 W. Liu, S. Weiss and L. Hanzo, “Low-Complexity Frequency-Domain GSC for Broadband Beamforming”, Proc. of the International Conference on Signal Processing (ICSP), pp. 386-389, Beijing, China, August 2002.

123.                 W. Liu, S. Weiss and L. Hanzo, “Partially Adaptive Broadband Beamforming with a Subband-selective Transformation Matrix”, Proc. of the IEEE Workshop on Sensor Array and Multichannel Signal Processing (SAM), pp.43-47, Virginia, USA, August 2002.

124.                 W. Liu, S. Weiss and L. Hanzo, "Subband-selective Partially Adaptive Broadband Beamforming with Cosine-modulated Blocking Matrix", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Vol. 3, pp. 2913-2916, Orlando, USA, May 2002.

125.                 W. Liu, S. Weiss and L. Hanzo, "A Novel Method for Partially Adaptive Broadband Beamforming", Proc. of the Workshop on Signal Processing Systems (SIPS), pp. 361-372, Antwerp, Belgium, September 2001.

126.                 W. Liu, S. Weiss and L. Hanzo, “Subband Adaptive Generalized Sidelobe Canceller for Broadband Beamforming", Proc. of the 11th IEEE workshop on statistical signal processing (SSP), pp. 591 –594, Singapore, August 2001.

127.                 W. Liu, S. Weiss, and L. Hanzo: "A Novel Subband Adaptive Beamforming Architecture Based on the Generalized Sidelobe Canceller", Proc. of the Postgraduate Research Conference in Electronics, Photonics, Communications and Software (PREP), pp. 23-24, University of Keele, UK, April 2001.

128.                 S. Weiss, W. Liu, R. W. Stewart and I. K. Proudler, “A Generalised Sidelobe Canceller Architecture Based on Oversampled Subband Decompositions.” Proc. of the 5th International Conference on Mathematics in Signal Processing, Warwick, UK, December 2000.

129.                 W. Liu, S. C. Chan, K. L. Ho. "Multiplier-less Low-delay FIR and IIR Wavelet Filter Banks with SOPOT Coefficients", Proc. of the European Signal Processing Conference (EUSIPCO), vol. 3, pp.289, Tampere, Finland, September 2000.

130.                 W. Liu, S. C. Chan, K. L. Ho, "Low-delay Perfect Reconstruction Two-channel FIR/IIR Filter Banks and Wavelet Bases with SOPOT Coefficients", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), vol. 1, pp. 109-102, Istanbul, Turkey, June 2000.

131.                 S. C. Chan, W. Liu, K. L. Ho, "Perfect Reconstruction Modulated Filter Banks with Sum of Powers-of-Two Coefficients", Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), pp. 73-76, Geneva, Switzerland, May 2000.