Publications

Books:

1. Q. Luo, S. Gao, W. Liu, and C. Gu, "Low-cost Smart Antennas", ISBN: 978-1-119-42277-8, Wiley-IEEE Press, March 2019.

2. 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, W. Liu, G. Cook, M. Paley, and E. Milne, "Source Analysis in Motor Imagery EEG BCI Applications" in the book "EEG Signal Processing: Feature Extraction, Selection and Classification Methods", edited by Wai Yie Leong, Institution of Engineering and Technology (IET), UK, March 2019.

2. J. Henshaw, W. Liu, and D. M. Romano, "Brain Signal Classification Using Normalisation" in the book "EEG Signal Processing: Feature Extraction, Selection and Classification Methods", edited by Wai Yie Leong, Institution of Engineering and Technology (IET), UK, March 2019.

3. 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.

4. M. Paley, S. Kaka, H. Hilliard, A. Zaitcev, A. Bucur, S. Reynolds, W. Liu, E. Milne, and 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.

5.  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. Y. N. Guan, H. P. Xu, W. Liu, C. S. Li,  "A False-alarm-controllable Modified AdaBoost Wake Detection Method Using SAR Images", IEEE Sensors Journal, to appear, 2023.

2. Y. Wang, H. P. Xu, G. B. Zeng, W. Liu, S. Li, and C. S. Li, "A Method for Selecting SAR Interferometric Pairs Based on Coherence Spectral Clustering", Transactions on Geoscience and Remote Sensing, to appear, 2023.

3. G. B. Zeng, H. P. Xu, W. Liu, A. F. Liu, and Y. Wang, "An MLE of Interferometric Coherence Matrix and Its Applications in Multipolarimetric Interferometric Phase Optimization and Phase Series Estimation", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, to appear, 2023.

4. J. Zhang, W. Liu, A. Tennant, W. Qi, J. Chen, and J. Zhang, "Spatial Scattering Modulation with Multipath Component Aggregation", IEEE Transactions on Green Communications and Networking, to appear, 2023.

5. J. Cong, X. Wang, X. Lan and W. Liu, "A Generalized Noise Reconstruction Approach for Robust DOA Estimation", IEEE Transactions on Radar Systems, vol. 1, pp. 382-394, 2023.

6. H. Chen, W. L. Wang, W. Liu, Y. Tian, and G. Wang, "An Exact Near-Field Model Based Localization for Bistatic MIMO Radar with COLD arrays", IEEE Transactions on Vehicular Technology, to appear.

7. J. X. Fang, H. Chen, W. Liu, M. H. Zhu, and G. Wang, "Three-dimensional near-field passive localization considering propagation attenuation based on trilinear decomposition", IEEE Sensors Journal, to appear.

8. Z. C. Zhang, Y. Tian, W. Liu, and H. Chen, "Enumeration for a Large Number of Sources Based on a Two-Step Difference Operation of Linear Shrinkage Coefficients", IEEE Transactions on Signal Processing, vol. 71, pp. 2283-2295, 2023.

9. M. L. Li, B. Zhang, B. J. Zhang, W. Liu, T. Kim, and C. Wang, "Directional Modulation Design for Multi-beam Multiplexing Based on Hybrid Antenna Array Structures", EURASIP Journal on Advances in Signal Processing, to appear, 2023.

10. M. L. Li, B. Zhang, B. J. Zhang, W. Liu, T. Kim, W. Wang, X. N. Zhao, and C. Wang, "Multi-carrier Based Positional Modulation Design with Discrete Phase Values for Metasurface Elements", Digital Signal Processing, to appear, 2023.

11. W. L. Wang, H. Chen, W. Liu, Q. Wang, and G. Wang, "Trilinear Decomposition Based Near-Field Source Localization with MIMO Velocity Vector Sensor Arrays", Signal Processing (Elsevier), to appear, 2023.

12. W. Liu, M. Haardt, M. S. Greco, C. Mecklenbrauker, and P. Willett, "Twenty-Five Years of Sensor Array and Multichannel Signal Processing", IEEE Signal Processing Magazine, vol. 40, no. 4, pp. 80-91, June 2023.

13. M. Huan, J. Liang, Y. Wu, Y. Li, and W. Liu, "SASA: Super-resolution and Ambiguity-free Sparse Array Geometry Optimization with Aperture Size Constraints for MIMO Radar", IEEE Transactions on Antennas and Propagation,  vol. 71, no. 6, pp. 4941-4954, June 2023.

14. Z. Y. Wan, W. Liu, and P. Willett, "Target Localization Based on  Distributed Array Networks with Magnitude-Only Measurements", IEEE Transactions on Aerospace and Electronic Systems, to appear, 2023.

15. Y. Tian, X. Y. Gao, W. Liu, H. Chen, M. Jin, "Localization of mixed coherently and incoherently distributed sources based on generalized array manifold", Signal Processing (Elsevier), vol. 209, pp. 1-13, art. no. 109038, 2023.

16. H. P. Xu, G. Zeng, W. Liu and Y. Wang, "MLE-MPPL: A Maximum Likelihood Estimator for Multipolarimetric Phase Linking in MTInSAR", IEEE Trans. on Geoscience and Remote Sensing, vol. 61, pp. 1-13, art. no. 5202913, 2023.

17. H. Xu, W. Liu, M. Jin, Y. Tian, "Positioning and Contour Extraction of Autonomous Vehicles Based on Enhanced DOA Estimation By Large-scale Arrays", IEEE Internet of Things Journal, vol. 10, no. 13, pp. 11792-11803, July 2023. 

18. Z. X. Yang, Q. Shen, W. Liu, Y. C. Eldar, and W. Cui, "High-Order Cumulants Based Sparse Array Design via Fractal Geometries—Part II: Robustness and Mutual Coupling", IEEE Trans. Signal Processing, vol. 71, pp. 343-357, 2023.

19. Z. X. Yang, Q. Shen, W. Liu, Y. C. Eldar, and W. Cui, "High-Order Cumulants Based Sparse Array Design via Fractal Geometries—Part I: Structures and DOFs", IEEE Trans. Signal Processing, vol. 71, pp. 327-342, 2023.

20. W. Liu, A. Madanayake, L. Yu, Q. Shen, and J. J. Cai, "Recent Advances in Design and Signal Processing for Antenna Arrays 2020", International Journal of Antennas and Propagation, vol. 2023, Article ID 9843456, 2023.

21. Q. Li, L. Huang, W. Liu, L. Feng and X. Chen, "Acquisition of Visible Satellites Based on Antenna Arrays via Joint  ℓ1,1 -Norms Minimization", IEEE Transactions on Vehicular Technology, vol. 72, no. 6, pp. 8105-8110, June 2023.

22. Q. Li, L. Huang, W. Liu, X. Chen and L. Feng, "Cold-Start Satellite Signal Acquisition Aided by an Antenna Array in the Presence of Outliers", IEEE Transactions on Vehicular Technology, vol. 72, no. 5, pp. 5847-5861, May 2023.

23. Y. Tian, X. Y. Gao, W. Liu, H. Chen, G. Wang, and Y. B. Qin, "Localization of Mixed Far-field and Near-field Incoherently Distributed Sources Using Two-stage RARE Estimator", IEEE Transactions on Aerospace and Electronic Systems, vol. 59, no. 2, pp. 1482-1494, April 2023. 

24. J. W. Zhang, H. P. Xu, W. Liu, C. S. Li, L. Feng, and Y. F. Chen, "Joint Design of SAR Waveform and Imaging Filters Based on Target Information Maximization", IEEE Journal of Selected Topics in Signal Processing, vol. 17, no. 2, pp. 416-430, March 2023.

25. Z. Yang, Q. Shen, W. Liu, W. Cui, "A Sum-Difference Expansion Scheme for Sparse Array Construction Based on the Fourth-Order Difference Co-Array", IEEE Signal Processing Letters, vol. 29, pp. 2647-2651, 2022.

26. J. J. Cai, P. Li, W. Liu, D. Bao, and Y. Y. Dong, "Analysis of the Fourth-Order Co-Array for a Mixture of Circular and Noncircular Signals", Digital Signal Processing, Art no. 103857, 2022.

27. J. J. Cai, F. M. Gan, X. H. Cao, W. Liu, and P. Li, "Radar Intra–Pulse Signal Modulation Classification with Contrastive Learning", Remote Sensing, vol.  14, no. 22: 5728, 2022.

28. W. Yang, J. Guo, J. Chen, W. Liu, J. Deng, Y. Wang, and H. C. Zeng, "A Novel Channel Inconsistency Estimation Method for Azimuth Multi-channel SAR Based on Maximum Normalized Image Sharpness", IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-16, Art no. 5237916, 2022.

29. Z. W. Jiang, H. Chen, W. Liu, and G. Wang, "3-D temporal-spatial-based near-field source localization considering amplitude attenuation", Signal Processing (Elsevier), vol. 201, art. no.108735, December 2022. 

30. Y. Tian, S. Liu, W. Liu, H. Chen, and Z. Y. Dong, "Vehicle Positioning with Deep Learning-Based Direction-of-Arrival Estimation of Incoherently Distributed Sources", IEEE Internet of Things Journal, vol. 9, no. 20, pp. 20083-20095, October 2022.

31. H. Chen, Z. Jiang, W. Liu, Y. Tian, and G. Wang, "Conjugate Augmented Decoupled 3-D Parameters Estimation Method for Near-Field Sources", IEEE Transactions on Aerospace and Electronic Systems, , vol. 58, no. 5, pp. 4681-4689, October 2022.

32. J. J. Cai, Y. Y. Tan, H. Y. Zhang, W. Liu, F. W. Tan and Y. Y. Dong, "A Low-Complexity Two-Dimensional DOA Estimation Algorithm Based on an L-Shaped Sensor Array", Digital Signal Processing (Elsevier), vol. 129, art. no. 103647 (1-12), September 2022.

33. B. Liao, W. Liu, Z. Y. Cheng, T. Y. Huang, "Guest Editorial: Advanced Signal Processing for Integration of Radar and Communication (IRC)", IET Signal Processing, vol. 16, no. 7, pp. 733-736, September 2022.

34. J. J. Cai, F. M. Gan, X. H. Cao and W. Liu, "Signal Modulation Classification Based on the Transformer Network", IEEE Transactions on Cognitive Communications and Networking, vol. 8, no. 3, pp. 1348-1357, September 2022.

35. B. Yang, H. P. Xu, L. M. Jiang, R. G. Huang, Z. W. Zhou, H. S. Wang, and W. Liu, "A Multicomponent Temporal Coherence Model for 3-D Phase Unwrapping in Time-Series InSAR of Seasonal Deformation Areas", Remote Sensing, vol. 14, no. 5, art. no. 1080, 2022.

36. H. P. Xu, S. Y. Xiao, Z. H. Li, S. Wang, W. Liu, J. W. Li, "A Novel SAR Imaging Method Based on Morphological Component Analysis", IEEE Sensors Journal, vol. 22, no. 13, pp. 13326-13337, July 2022. 

37. J. Zhang, W. Liu, C. Gu, S. Gao, and Q. Luo, "Robust Multi-Beam Multiplexing Design Based on a Hybrid Beamforming Structure with Nearly Equal Magnitude Analogue Coefficients", IEEE Transactions on Vehicular Technology, vol. 71, issue 5, pp. 5564-5569, May  2022.

38. M. H. Dai, X. F. Ma, W. Liu, W. X. Sheng, Y. B. Han, and H. W. Xu, "Monopulse Based DOA and Polarization Estimation with Polarization Sensitive Arrays", Signal Processing, vol. 195, art no 108487, 2022.

39. Y. Tian, X. Gao, W. Liu, and H. Chen, "Phase Compensation Based Localization of Mixed Far-Field and Near-Field Sources", in IEEE Wireless Communications Letters, vol. 11, issue 3, pp. 598-601, March 2022.

40. Y. Tian, W. Liu, H. Xu, S. Liu, and Z. Y. Dong, "2-D DOA Estimation of Incoherently Distributed Sources Considering Gain-Phase Perturbations in Massive MIMO Systems", IEEE Transactions on Wireless Communications, vol. 21, issue 2, pp. 1143-1155, February 2022.

41. Q. Luo, S. Gao, W. Hu, W. Liu, L. M. Pessoa, M. Sobhy, and Y. C. Sun, "Proof of Concept of a Low-Cost Beam-Steering Hybrid Reflectarray that Mixes Microstrip and Lens Elements Using Passive Demonstrators", IEEE Communications Magazine, vol. 60, no. 1, pp. 21-26, January 2022.

42. Y. Z. Guo, J, Jin, Q. Wang, H. Chen, and W. Liu, "Position-Enabled Complex Toeplitz LISTA for DOA Estimation with Unknown Mutual Coupling", Signal Processing (Elsevier), vol. 194, art no. 108422, 2022.

43. Z. Y. Wan, and W. Liu, "Time-Domain Wideband DOA Estimation under the Convolutional Sparse Coding Framework", IEEE Signal Processing Letters, vol. 22, pp. 274-278, 2022.

44. Y. Y. Dong, C. X. Dong, W. Liu, J. J. Cai, "Generalized ℓ2 − ℓp Minimization Based DOA Estimation for Sources with Known Waveforms in Impulsive Noise", Signal Processing (Elsevier), vol. 190, art no. 108313, January 2022.

45. X. K. Zhou, P. B. Wang, J. Chen, Z. R. Men, W. Liu, and H. C. Zeng, "A Modified Radon Fourier Transform for GNSS-Based Bistatic Radar Target Detection",  IEEE Geoscience and Remote Sensing Letters, vol. 19, pp. 1-5, Art no. 3501805, 2022.

46. J. W. Zhang, H. P. Xu, W. Liu, C. S. Li, and Y. F. Chen, "Joint Design of Transmit Weight Sequence and Receive Filter for Improved Target Information Acquisition in High-Resolution Radar", IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-14, Art no. 5104114, 2022 .

47. H. P. Xu, Z. H. Li, S. Li, W. Liu, J. W. Li, A. F. Liu, and W. Li, "Nonlocal Noise Reduction Method Based on Fringe Frequency Compensation for SAR Interferogram", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 14, pp. 9756-9767, 2021.

48. H. T. Wu, Q. Shen, W. Cui, and W. Liu, "DOA Estimation with Nonuniform Moving Sampling Scheme Based on a Moving Platform", IEEE Signal Processing Letters, vol. 28, pp. 1714-1718, 2021.

49. Y. B. Liang, W. Cui, Q. Shen, W. Liu, and S. L. Wu, "Cramer-Rao Bound Analysis of Underdetermined Wideband DOA Estimation under the Subband Model via Frequency Decomposition", IEEE Transactions on Signal Processing, vol. 69, pp. 4132-4148, 2021.

50. B. Zhang, W. Liu, Q. Li, Y. Li, X. N. Zhao, C. P. Zhang, and C. Wang, "Directional Modulation Design under a Given Symbol-Independent Magnitude Constraint for Secure IoT Networks", IEEE Internet of Things Journal, vol. 8, no. 20, pp. 15140-15147, October 2021.

51. W. Yang, Y. H. Li, W. Liu, J. Chen, C. S. Li, and Z. R. Men, "Scalloping Suppression for ScanSAR Images Based on Modified Kalman Filter With Pre-processing", IEEE Transactions on Geoscience and Remote Sensing, vol. 59, issue 9, pp. 7536-7546, September 2021.

52. Y. B. Liang, W. Cui, Q. Shen, W. Liu, and H. T. Wu, "Cramer-Rao Bound for DOA Estimation Exploiting Multiple Frequency Pairs", IEEE Signal Processing Letters, vol. 28, pp. 1210-1214, 2021.

53. Y. Wang, J. Chen, W. Liu, C. S. Li, W. Yang, "A Moving Target Velocity Estimation Method Based on the MC-MASA SAR Mode", Remote Sensing, vol. 13, issue 9, pp. 1632(1-22), 2021.

54. J. J. Cai, X. Y. Chan, W. Liu, T. Shang, and C. Li, "Photonic Direction-of-Arrival Estimation Based on Compressive Sensing", Applied Optics,  vol. 60, issue 12, pp. 3482-3486, 2021 .

55. X. Lan, and W. Liu, "Direction of Arrival Estimation Based on a Mixed Signal Transmission Model Employing a Linear Tripole Array", IEEE Access, vol. 9, pp. 47828-47841, 2021.

56. L. P. Teng, Q. Wang, H. Chen, W. Liu, W. P. Zhu, and J. J. Cai, "Atomic Norm Based DOA Estimation with Sum and Difference Co-arrays in Coexistence of Circular and Non-Circular Signals", Circuits, Systems, and Signal Processing, vol. 40, pp. 5033–5053 , 2021.

57. Z. Y. Wan, and W. Liu, "Non-Coherent DOA Estimation via Proximal Gradient Based on a Dual-Array Structure", IEEE Access, vol. 9, pp. 26792-26801, 2021.

58. Y. H. Liu, H. Chen, Q. Wang, W. Liu, G. Wang, "Noncircularity-Based Generalized Shift Invariance for Estimation of Angular Parameters of Incoherently Distributed Sources", Signal Processing (Elsevier), vol. 183, pp. 107989(1-8) June 2021.

59. J. Jiang, S. Li, X. Wang, C. Li, Z. Sun, W. Liu, F. Duan, and X. Fu, "Study of the Relationship Between Sound Signals and Behaviours of a Sperm Whale during the Hunting Process", Applied Acoustics, vol. 174, pp. 107745 (1-11), March 2021.

60. H. L. Gao, J. Chen, W. Liu, C. S. Li, and W. Yang, "Phase Inconsistency Error Compensation for Multi-channel Spaceborne SAR Based on the Rotation-Invariant Property", IEEE Geoscience and Remote Sensing Letters, vol. 18, issue 2, pp. 301-305, February 2021.

61. Z. Men, P. Wang, J. Chen, C. Li, W. Liu, and W. Yang, "Advanced High-Order Non-Linear Chirp Scaling Algorithm for High-Resolution Wide-Swath Spaceborne SAR", Chinese Journal of Aeronautics, vol. 34, issue 2, pp. 563-575, February 2021.

62. J.  J. Cai, Y. B. Liang, W. Liu, and Y. Y. Dong, "Stochastic Cramer-Rao Bound for DOA Estimation with a Mixture of Circular and Noncircular Signals", IEEE Access, vol. 8, pp. 226370-226379, 2020.

63. Q. Shen, W. Liu, L. Wang and Y. Liu, "Group Sparsity Based Localization for Far-Field and Near-Field Sources Based on Distributed Sensor Array Networks", IEEE Transactions on Signal Processing, vol. 68,   pp. 6493 - 6508, 2020.

64. H. C. Zeng, J. Chen, P. B. Wang, W. Liu, X. K. Zhou, and W. Yang, "Moving Target Detection in Multi-static GNSS-based Passive Radar Based on Multi-Bernoulli Filter", Remote Sensing, vol. 12, no. 21:3495, 2020.

65. X. Lan, W. Liu, and Henry Y. T. Ngan, "Joint DOA and Polarization Estimation with Crossed-dipole and Tripole Sensor Arrays", IEEE Transactions on Aerospace and Electronic Systems, vol. 56, issue 6, pp. 4965-4973, December 2020.

66. B. Zhang, W. Liu, J. X. Ma, Z. C. Qi, J. W. Zhang, L. Han, Y. Li, X. N. Zhao, C. P. Zhang, and C. Wang, "Sparse Antenna Array Based Positional Modulation Design with a Low-Complexity Metasurface", IEEE Access, vol. 8, 177640 - 177646 , 2020.

67. H. Chen, Y. Liu, Q. Wang, W. Liu and G. Wang, "Two-Dimensional Angular Parameter Estimation for Noncircular Incoherently Distributed Sources Based on an L-Shaped Array", IEEE Sensors Journal, vol. 20 , issue 22, pp. 13704-13715, November 2020.

68. J. Zhang, W. Liu, C. Gu, S. Gao, and Q. Luo, "Multi-Beam Multiplexing Design for Arbitrary Directions Based on the Interleaved Subarray Architecture", IEEE Transactions on Vehicular Technology, vol. 69, issue 10, pp. 11220-11232, October 2020.

69. H. P. Xu, J. W. Zhang, W. Liu, S. Wang, and C. S. Li, "High Resolution Radar Waveform Design Based on Target Information Maximization", IEEE Transactions on Aerospace and Electronic Systems, vol. 56, issue 5, pp. 3577-3587, October 2020. 

70. Y. B. Liang, W. Liu, Q. Shen, W. Cui, and S. L. Wu, "A Review of Closed-Form Cramér-Rao Bounds for DOA Estimation in the Presence of Gaussian Noise Under a Unified Framework", IEEE Access, vol. 8, pp. 175101 - 175124, September 2020.

71. J. Y. Guo, J. Chen, W. Liu, C. S. Li, and W. Yang, "An Improved Airborne Multi-Channel SAR Imaging Method With Motion Compensation and Range-Variant Channel Mismatch Correction", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 13, pp. 5414-5423, September 2020.

72. S. Li, H. P. Xu, S. Gao, W. Liu, C. S. Li, and A. F. Liu, "An Interferometric Phase Noise Reduction Method Based on Modified Denoising Convolutional Neural Network", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 13, pp. 4947-4959, 2020.

73. W. Liu, M. R. Anbiyaei, X. Jiang, L. Zhang, and L. Marcenaro, "Let There Be a Beam: Highlights from the 2020 IEEE Five-Minute Video Clip Contest", IEEE Signal Processing Magazine, vol. 37, issue 5, pp. 157-162, September 2020.

74. J. J. Jiang, Z. B. Sun, F. J. Duan, X. Fu, X. Q. Wang, C. Y. Li, and W. Liu, "Synthesis and Modification of Cetacean Tonal Sounds for Underwater Bionic Covert Detection and Communication", IEEE Access, vol. 8, pp.119980-119994, 2020.

75. B. Zhang, W. Liu, Q. Li, Y. Li, X. N. Zhao, C. P. Zhang, and C. Wang, "Metasurface Based Positional Modulation Design", IEEE Access, vol. 8, pp. 113807-113813, 2020.

76. J. J. Jiang, J. Y. Xu, F. J. Duan, X. Q. Wang, W. Liu, and X. Fu, "Camouflage Covert Communication in Air by Imitating Cricket’s Sound", IEEE Access, vol. 8, pp. 71840-71850, 2020.

77. B. Zhang, W. Liu, Y. Li, X. N. Zhao, C. P. Zhang, and C. Wang, "Symbol-Independent Weight Magnitude Design for Antenna Array Based Directional Modulation", Ad Hoc Networks, vol. 101, pp. 102097(1-7), 2020.

78. J. D. Wang, J. J. Jiang, F. J. Duan, F. M. Zhang, W. Liu,  and X. H. Qu, "A Novel Fast Resonance Frequency Tracking Method Based on the Admittance Circle for Ultrasonic Transducers", IEEE Transactions on Industrial Electronics, vol. 67, issue. 8, pp. 6864-6873, August 2020.

79. H. Chen, W. F. Wang, and W. Liu, "Augmented Quaternion ESPRIT-type DOA Estimation with a Crossed-Dipole Array", IEEE Communications Letters, vol. 24, no. 3, pp. 548-552,  March 2020.

80. B. Zhang, W. Liu, Y. Li, X. N. Zhao, and C. Wang, "Directional Modulation Design Under Maximum and Minimum Magnitude Constraints for Weight Coefficients", Ad Hoc Networks, vol. 98, pp. 102034(1-7), March 2020.

81. Y. Y. Dong, C. X. Dong, W. Liu, and M. M. Liu, "DOA Estimation with Known Waveforms in the Presence of Unknown Time Delays and Doppler Shifts", Signal Processing (Elsevier), vol. 166, pp. 107232 (1-8), January 2020.

82. J. D. Wang, J. J. Jiang, F. J. Duan, S. Y. Cheng, C. X. Peng, W. Liu, and X. H. Qu, "A High-Tolerance Matching Method against Load Fluctuation for Ultrasonic Transducers", IEEE Transactions on Power Electronics, vol. 35, issue 1, pp. 1147-1155, January 2020.

83. Q. Li, L. Huang, and W. Liu, "Carrier Phase Recovery for Array Navigation Receiver: A Fast Phase Retrieval Approach", IEEE Access, vol. 7, pp. 179385-179395, December 2019.

84. L. W. Sun, Z. Yu, C. S. Li, W. Liu, S. S. Wang, and J. W. Geng, "An Imaging Algorithm for Spaceborne High-squint L-band SAR Based on Time-domain Rotation", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 12, issue 12, pp. 5289-5299, December 2019.

85. X. K. Zhou, J. Chen, P. B. Wang, H. C. Zeng, Y. Fang, Z. R. Men, and W. Liu, "An Efficient Imaging Algorithm for GNSS-R Bi-static SAR", Remote Sensing, vol. 11, issue 24, pp. 2945 (1-24), 2019.

86. H. P. Xu, Y. Luo, B. Yang, Z. H.  Li, and W. Liu, "Tropospheric Delay Correction Based on a Three Dimensional Joint Model for InSAR", Remote Sensing, vol. 11, issue 21, pp. 2542(1-25), 2019.

87. B. Zhang, W. Liu, Y. Li, X. N. Zhao, and C. Wang, "Directional Modulation Design under a Constant Magnitude Constraint for Weight Coefficients", IEEE Access, vol. 7, pp. 154711-154718, 2019.  

88. Y. Y. Dong, C. X. Dong, W. Liu, M. M. Liu, and Z. Z. Tang, "Scaling Transform Based Information Geometry Method for DOA Estimation", IEEE Transactions on Aerospace and Electronic Systems, vol. 55, issue 6,  pp. 3640-3650, December 2019. 

89. B. Yang, H. P. Xu, W. Liu, J. X. Ge, C. S. Li, and J. W. Li, "An Improved Stanford Method for Persistent Scatterers Applied to 3D Building Reconstruction and Monitoring", Remote Sensing, vol. 11, issue 15, pp. 1807 (1-18), 2019.

90. B. Zhang, W. Liu, and Q. Li, "Multi-Carrier Waveform Design for Directional Modulation under Peak to Average Power Ratio Constraint", IEEE Access, vol. 7, issue 1, pp. 37528-37535, December 2019.

91. B. Zhang, W. Liu, and X. Lan, "Orthogonally Polarised Dual-Channel Directional Modulation Based on Crossed-Dipole Arrays", IEEE Access, vol. 7, issue 1, pp. 34198-34206, December 2019.

92. B. Zhang, and W. Liu, "Positional Modulation Design Based on Multiple Phased Antenna Arrays", IEEE Access, vol. 7, issue 1, pp. 33898-33905, December 2019.  

93. Y. M. Wang, W. Yang, J. Chen, H. Kuang, W. Liu, C. S. Li, "Azimuth Sidelobes Suppression using Multi-azimuth Angle SAR Images", Sensors (MDPI), vol. 19, issue 12, pp. 2764 (1-11), 2019.

94. Q. Wang, X. Wang, H. Chen, X. T. Zhu, W. Liu, W. Q. Yan, L. H. Wang, "An Effective Localization Method for Mixed Far-Field and Near-Field Strictly Non-circular Sources", Digital Signal Processing (Elsevier), vol. 94, pp. 125-136, November 2019. 

95. H. Chen, W. F. Wang, and W. Liu, "Joint DOA, Range, and Polarization Estimation for Rectilinear Sources with a COLD Array", IEEE Wireless Communications Letters, vol. 8, issue 5, pp. 1398-1401, October 2019.

96. W. Cui, Q. Shen, W. Liu, and S. L. Wu, "Low Complexity DOA Estimation for Wideband Off-Grid Sources Based on Re-Focused Compressive Sensing with Dynamic Dictionary", IEEE Journal of Selected Topics in Signal Processing, vol. 13, issue 5, pp. 918-930, September 2019.

97. C. Y. Li, J. J. Jiang, F. J. Duan, W. Liu, X. Q. Wang, L. R. Bu, Z. B. Sun and G. L. Yang, “Modeling and Experimental Testing of an Unmanned Surface Vehicle with Rudderless Double Thrusters”, Sensors (MDPI), vol. 19, issue 9, pp. 2051 (1-22), 2019.

98. Q. Shen, W. Liu, W. Cui, S. L. Wu, and P. Pal, "Simplified and Enhanced Multiple Level Nested Arrays Exploiting High Order Difference Co-Arrays", IEEE Transactions on Signal Processing, vol. 67, issue 13, pp. 3502-3515, July 2019.

99. J. J. Jiang, L. R. Bu, F. J. Duan, X. Q. Wang, W. Liu, Z. B. Sun, and C. Y. Li, "Whistle Detection and Classification for Whales Based on Convolutional Neural Networks", Applied Acoustics, vol. 150, pp. 169-178, July 2019.

100. Y. Fang, J. Chen, P. Wang, C.-S. Li, and W. Liu, "A Novel Image Formation Method for Electromagnetic Vortex SAR with Orbital-Angular-Momentum", Progress In Electromagnetics Research M, Vol. 82, 129-137, 2019. 

101. A. Raza, W. Liu, and Q. Shen, "Thinned Coprime Array for Second-Order Difference Co-Array Generation with Reduced Mutual Coupling", IEEE Transactions on Signal Processing, vol. 67, no. 8, pp. 2052-2065, April 2019.

102. H. Chen, W. Liu, W. P. Zhu, M. N. S. Swamy, and Q. Wang, "Mixed Rectilinear Sources Localization Under Unknown Mutual Coupling", Journal of the Franklin Institute, vol. 356, issue 4, pp. 2372-2394, March 2019.

103. J. W. Geng, Z. Yu, C. S. Li, and W. Liu, "Squint Mode GEO SAR Imaging using Bulk Range Walk Correction on Received Signals", Remote Sensing, vol. 11, issue 1, pp. 17(1-26), 2019.

104. J. J. Jiang, X. Q. Wang, F. J. Duan, W. Liu, L. R. Bu, F. Y. Li, C. Y. Li, Z. B. Sun, S. X. Ma, and C. Deng, "Study of the Relationship between Pilot Whale (Globicephala Melas) Behaviour and the Ambiguity Function of Its Sounds", Applied Acoustics, vol. 146, pp. 31-37, March 2019.

105. P. Xiao, X. L. Tian, M. Liu, and W. Liu, "Multipath Smearing Suppression for Synthetic Aperture Radar Images of Harbor Scenes", IEEE Access, vol. 7, pp. 20150-20162, February 2019.

106. H. Chen, W. P. Zhu, W. Liu, M. N. S. Swamy, Y. M. Li, Q. Wang, and Z. J. Peng, "RARE-Based Localization for Mixed Near-Field and Far-Field Rectilinear Sources", Digital Signal Processing, vol. 85, pp. 54-61, February 2019.

107. M. Y. Ma, J. Chen, W. Liu, and W. Yang, "Ship Classification and Detection Based on CNN Using GF-3 SAR Images", Remote Sensing, vol. 10, issue 12, pp. 2043(1-22), 2018.

108. H. P. Xu, S. Li, Y. N. You, A. F. Liu, and W. Liu, "Unwrapped Phase Estimation via Normalized Probability Density Function for Multibaseline InSAR", IEEE Access, vol. 7, pp. 4979-4988, December 2018.

109. Y. Y. Dong, C. X. Dong, W. Liu, M. M. Liu, and Z. Z. Tang, "A Structure-Aware DOA Estimation Method for Sources with Short Known Waveforms", IEEE Access, vol. 6, pp. 71271-71278, November 2018. 

110. Q. Shen, W. Liu, L. Wang, and Y. Liu, "Adaptive Beamforming for Target Detection and Surveillance Based on Distributed Unmanned Aerial Vehicle Platforms", IEEE Access, vol. 6, pp. 60812-60823, 2018.

111. Z. Yu, W. Q. Wang, C. S. Li, W. Liu, and J. Yang, "Speckle Noise Suppression in SAR Images Using a Three-step Algorithm", Sensors, vol. 18, issue 11, pp. 3643(1-13), 2018.

112. A. Raza and W. Liu, "Revisit of the Eigenfilter Method for the Design of FIR Filters and Wideband Beamformers", Systems Science & Control Engineering, vol. 6, issue 1, pp. 482–491, 2018.

113. J. J. Jiang, Z. B. Sun, F. J. Duan, W. Liu, X. Q. Wang, C. Y. Li, L. R. Bu, X. Fu, T. T. Huang, and L. Ma, "Disguised Bionic Sonar Signal Waveform Design with Its Possible Camouflage Application Strategy for Underwater Sensor Platforms", IEEE Sensors Journal, vol. 18, no. 20, pp. 8436-8449, October 2018.

114. Z. Yu, S. S. Wang, W. Liu and C. S. Li, "Joint Design of Space-time Transmit and Receive Weights for Colocated MIMO Radar", Sensors (MDPI), vol. 18, issue 8, pp. 2722(1-15), 2018.

115. B. Yang, H. P. Xu, W. Liu, Y. Luo, and S. Y. Huang, "A Novel Statistical Model for Differential Synthetic Aperture Radar Tomography", Measurement Science and Technology, vol. 29, pp. 095404 (1-11), 2018. 

116. H. C. Zeng, J. Chen, P. B. Wang, W. Yang, and W. Liu, "2-D Coherent Integration Processing and Detecting of Aircrafts Using GNSS-based Passive Radar", Remote Sensing, vol. 10, no. 7, pp. 1164(1-21), 2018.

117. Y. Y. Dong, C. X. Dong, W. Liu, M. M. Liu, and Z. Z. Tang, "Robust DOA Estimation for Sources with Known Waveforms Against Doppler Shifts via Oblique Projection", IEEE Sensors Journal, vol. 18, no. 16, pp. 6735-6742, August 2018. 

118. J. J. Cai, W. Liu, R. Zong, and B. Wu, "An Improved Expanding and Shift Scheme for the Construction of Fourth-Order Difference Co-Arrays", Elsevier Signal Processing, vol. 153, pp. 95-100, December 2018.

119. Q. Q. Feng, H. P. Xu, Z. F. Wu, and W. Liu, "Deceptive Jamming Detection for SAR Based on Cross-Track Interferometry", Sensors (MDPI), vol. 18, no. 7, pp. 2265(1-13), July 2018.

120. B. Yang, H. P. Xu, W. Liu, Y. N. You, and X. Z. Xie, "Realistic Lower Bound on Elevation Estimation for Tomographic SAR", IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, vol. 11, issue 7, pp. 2429-2439, July 2018.

121. X. M. Gou, Z. W. Liu, W. Liu, Y. G. Xu, J. B. Wang, "Quaternion-Valued Single-Phase Model for Three-Phase Power System", Journal of Electrical Engineering, vol. 69, no. 2, pp. 183-186, 2018.

122. Q. Li, L. Huang, W. Liu, W. Z. Sun, and P. C. Zhang, "A Fast Gradient-Based Iterative Algorithm for Undersampled Phase Retrieval", IEEE Transactions on Aerospace and Electronic Systems, vol. 54, issue 4, pp. 2086-2090, August 2018.

123. S. M. Anwar, S. M. U. Saeed, M. Majid, S. Usman, C. A. Mehmood, and W. Liu, "A Game Player Expertise Level Classification System Using Electroencephalography (EEG)", Applied Sciences, vol. 8, no. 1, pp. 18(1-15), 2018.

124. B. Zhang, and W. Liu, "Multi-Carrier Based Phased Antenna Array Design for Directional Modulation", IET Microwaves, Antennas & Propagation, vol. 12, issue 5, pp. 765-772, 2018.

125. J. Cai, W. Liu, R. Zong, and B. Wu, "Sparse Array Extension for Non-Circular Signals with Subspace and Compressive Sensing Based DOA Estimation Methods", Signal Processing (Elsevier), vol. 145, pp. 59-67, April 2018.

126. M. R. Anbiyaei, W. Liu, and D. C. McLernon, "White Noise Reduction for Wideband Linear Array Signal Processing", IET Signal Processing, vol. 12, issue 3, pp. 335-345, 2018.

127. J. X. Ma, and W. Liu, "Robust Iterative Transceiver Beamforming for Multipair Two-Way Distributed Relay Networks", IEEE Access, vol. 5, issue 1, pp. 24656-24667, December 2017.

128. Z. Qi and W. Liu, "Three-Dimensional Millimetre Wave Beam Tracking Based on Smart Phone Sensor Measurements and DOA/TOA Estimation for 5G Networks", IET Microwaves, Antennas & Propagation, vol. 12, issue 3, pp. 271-279, 2018.

129. T. Li, J. Su, W. Liu, and J. M. Corchado, "Approximate Gaussian Conjugacy: Parametric Recursive Filtering Under Nonlinearity, Multimodal, Uncertainty, and Constraint, and Beyond", Frontiers of Information Technology & Electronic Engineering, vol. 18, issue 12, pp 1913-1939, December 2017.

130. Q. Wang, T. D. Dou, H. Chen, W. Q. Yang, and W. Liu, "Effective Block Sparse Representation Algorithm for DOA Estimation with Unknown Mutual Coupling", IEEE Communications Letters, vol. 21, issue 12, pp. 2622-2625, December 2017.

131. W. Yang, J. Chen, W. Liu, P. B. Wang, and C. S. Li, "A Modified Three-Step Algorithm for TOPS and Sliding Spotlight SAR Data Processing", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, issue. 12, pp. 6910 - 6921, December 2017.

132. W. Liu, "Channel Equalization and Beamforming for Quaternion-Valued Wireless Communication Systems", Journal of the Franklin Institute, vol. 354, issue 18, pp. 8721-8733, December 2017. 

133. W. Guo, J. Chen, W. Liu, and C. S. Li, "Time-Variant TEC Estimation with Fully Polarimetric GEO-SAR Data", Electronics Letters, vol. 53, issue 24, pp. 1606-1608, November 2017.

134. Z. R. Men, P. B. Wang, C. S. Li, J. Chen, W. Liu, and Y. Fang, "High-Temporal-Resolution High-Spatial-Resolution Spaceborne SAR Based on Continuously Varying PRF", Sensors (MDPI), to appear.

135. 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", vol. 6, issue 2, pp. 34(1-16), 2017.

136. 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, vol. 10,  issue 6, pp. 2780-2790, June 2017.

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

138. 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.

139. 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.

140. 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.

141. 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.

142. B. Zhang, W. Liu, and X. Gou, "Compressive Sensing Based Sparse Antenna Array Design for Directional Modulation", IET Microwaves, Antennas & Propagation, vol. 11, issue 5, pp. 634-641, April 2017.

143. 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.

144. 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.

145. 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.

146. 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.

147. 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.

148. 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.

149. 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.

150. 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.

151. 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.

152. 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.

153. 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.

154. 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.

155. 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.

156. 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.

157. 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.

158. 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.

159. 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.

160. 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.

161. 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.

162. 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.

163. 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.

164. 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 Transactions on Aerospace and Electronic Systems, vol. 51, issue 4, pp. 2834-2846, October 2015.

165. 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.

166. 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 Transactions on Audio, Speech and Language Processing,  vol. 23, no. 9, pp. 1445–1456, Sep. 2015.

167. 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.

168. 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.

169. 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 Transactions on Aerospace and Electronic Systems, vol. 51, issue 3, pp. 1877-1890, July 2015. 

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

171. J. C. Li, J. Chen, W. Liu, P. B. Wang, and 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.

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

173. 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.

174. 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 Transactions on Geoscience and Remote Sensing, vol. 53, issue 3, pp. 1225-1235, March 2015.

175. 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.

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

177. 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.

178. 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.

179. 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.

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

181. 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.

182. 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.

183. 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.

184. 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.

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

186. 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.

187. 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.

188. 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.

189. 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.

190. 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.

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

192. 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.

193. 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.

194. 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.

195. 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.

196. 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.

197. 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.

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

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

200. 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

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

202. 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.

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

204. 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.

205. 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.

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

207. 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.

208. 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.

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

210. 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.

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

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

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

214. 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.

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

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

217. 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.

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

219. 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.

220. W. Liu, D. P. Mandic, and A. Cichocki, "Blind Second-Order Source Extraction of Instantaneous Noisy Mixtures", IEEE Transactions on Circuits and Systems II, vol. 53, no. 9, pp. 931--935, September 2006.

221. 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.

222. W. Liu, S. Weiss, and L. Hanzo, "A Generalised Sidelobe Canceller Employing Two-Dimensional Frequency Invariant Filters", IEEE Transactions on Antennas and Propagation, vol. 53, issue 7, pp. 2339-2343, July 2005.

223. W. Liu, S. Weiss, and L. Hanzo, "A Subband-Selective Broadband GSC with Cosine-Modulated Blocking Matrix", IEEE Transactions on Antennas and Propagation, vol. 52, no. 3, pp. 813-820, March 2004.

224. 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.

225. S.C. Chan, W. Liu, and K.L. Ho, "Multiplier-less Perfect Reconstruction Modulated Filter Banks with Sum-of-Powers-of-Two Coefficients", IEEE Signal Processing Letter, vol. 8, pp.163-166, June 2001.

226. 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 Transactions on Signal Processing, vol. 40, pp. 3379-3394, December 2000.

Conference papers:

1. A. Moussa, and W. Liu, "A Two-Stage Sparsity-Based Method for Location and Doppler Estimation in Bistatic Automotive Radar", Proc. of the  IEEE Statistical Signal Processing Workshop (SSP),  Hanoi, Vietnam, July 2023.

2. D. S. Li, W. Liu, Y. Zakharov, and P. Mitchell, "Graph Signal Processing for Narrowband Direction of Arrival Estimation", Proc. of the IEEE International Conference on Acoustics, Speech and Signal Processing, Rhodes Island, Greece, June 2023.

3. Z. Y. Wan, and W. Liu, "Wideband DOA Estimation with Magnitude-Only Measurements", Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), Monterey, California, USA, May 2023.

4. J. L. Zhang, W. Liu, A. Tennant, W. J. Qi, J. M. Chen, and J. Zhang, "Performance Evaluation of Spatial Scattering Modulation in the Indoor Environment", Proc. the 18th International Symposium on Wireless Communication Systems (ISWCS), Hangzhou, China, October 2022.

5. M. L. Li, B. Zhang, B. J. Zhang, W. Liu, T. Kim, W. Wang, B. Wang, and C. Wang, "Positional Modulation Design with Discrete Phase Values for Metasurface Elements", Proc. of the 16th IEEE International Conference on Signal Processing (ICSP), Beijing, China, October 2022.

6. M. L. Li, B. Zhang, B. J. Zhang, W. Liu, T. Kim, and C. Wang, "Directional Modulation Design Based on Hybrid Beamforming Structure for Massive MIMO", Proc.  of the 11th International Conference on Communications, Signal Processing, and Systems (CSPS), Changbaishan, China, July 2022.

7. Z. Y. Wan, W. Liu, and P. Willett, "Non-Coherent Source Localization with Distributed Sensor Array Networks", Proc. of the 12th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Trondheim, Norway, June 2022.

8. Z. W. Jiang, H. Chen, W. Liu, Y. Tian, and G. Wang, "Conjugate Augmented Spatial-Temporal Near-Field Sources Localization with Cross Array", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Singapore, May 2022.

9. H. T. Wu, Q. Shen, W. Liu, and Y. B. Liang, "Underdetermined Two-Dimensional Localization for Wideband Sources Based on Distributed Sensor Array Networks", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Singapore, May 2022.

10. J. W. Zhang, and W. Liu, "Antenna Selection Design of Crossed-Dipole Arrays for Multi-Beam Multiplexing Based on a Hybrid Beamforming Structure", Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), Austin Texas, USA, May 2022.

11. A. Moussa, and W. Liu, "Enhanced Detection in Automotive Applications Using Bistatic Radar with Cooperative Roadside Sensors", Proc. of the CIE International Conference on Radar, Hainan, China, December 2021.

12. J. Zhang, and W. Liu, "Antenna Selection for Multi-Beam Multiplexing Design Based on the Hybrid Beamforming Architecture", Proc. of the IEEE Statistical Signal Processing Workshop, Rio de Janeiro, Brazil, July 2021.

13. Z. Wan, and W. Liu, "Non-Coherent DOA Estimation of Off-Grid Signals with Uniform Circular Arrays", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Toronto, Canada, June 2021.

14. Z. X. Yang, Q. Shen, W. Liu, Y. C. Eldar, and W. Cui, "Extended Cantor Arrays with Hole-Free Fourth-Order Difference Co-Arrays", Proc. of the IEEE International Symposium on Circuits and Systems (ISCAS), Daegu, Korea, May 2021.

15. J. J. Cai, H. Y. Zhang, W. Liu, F. W. Tan and Y. Y. Dong, "A Derivative-Based MUSIC Algorithm for Two-Dimensional Angle Estimation Employing an L-Shaped Array", Proc. of the IEEE Symposium on Signal Processing and Information Technology (ISSPIT), Louisville, Kentucky, USA, December 2020.

16. Z. Wan, and W. Liu, "A Fast Group Sparsity Based Phase Retrieval Algorithm for Non-Coherent DOA Estimation", Proc. of the 54th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, USA, November 2020.

17. J. J. Cai, C. Li, W. Liu, and R. Zong, "An Optical Power Ratio Based Approach to Direction of Arrival Estimation of Microwave Signals with High Dynamic Frequency Range", Proc. of the 7th SPIE Symposium on Novel Photoelectronic Detection Technology and Application, Kunming, China, November 2020.

18. Y. B. Liang, W. Liu, Q. Shen, W. Cui, and S. L. Wu, "On the Cramer-Rao Bound and the Number of Resolvable Sources in the Presence of Nonuniform Noise for Underdetermined DOA Estimation", Proc. of the 15th IEEE International Conference on Signal Processing (ICSP), Beijing, China, October 2020.

19. C. Wang, W. Liu, and M. D. Jiang, "A Unified Approach for Target Direction Finding Based on Convolutional Neural Networks", Proc. of the 30th IEEE International Workshop on Machine Learning for Signal Processing (MLSP), Espoo, Finland, September 2020.

20. J. Zhang, W. Liu, C. Gu, S. Gao, and Q. Luo, "Dual-Beam Multiplexing Under an Equal Magnitude Constraint Based on a Hybrid Beamforming Structure", Proc. of the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), London, UK, September 2020.

21. A. Moussa, and W. Liu, "Fast and Accurate Range-Doppler Estimation in Multi-Target Wideband Automotive FMCW Radar," Proc. of the International Conference on UK-China Emerging Technologies (UCET),  Glasgow, UK, August 2020.

22. J. J. Cai, W. Liu, R. Zong, and Y. Y. Dong, "A MUSIC-Type DOA Estimation Method Based on Sparse Arrays for a Mixture of Circular and Non-Circular Signals", Proc. of the IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), Macau, China, August 2020.

23. J. Zhang, B. Zhang, J. Gao, Q. Hu, W. Liu, Y. Li, X. Zhao, C. Zhang, C. Wang, "Directional Modulation Design with a Transmission Power Constraint", Proc. of the 9th International Conference on Communications, Signal Processing, and Systems (CSPS), Changbaishan, China, July 2020.

24. H. T. Wu, Q. Shen, W. Liu, and W. Cui, "Underdetermined Low-Complexity Wideband DOA Estimation with Uniform Linear Arrays", Proc. of the 11th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Hangzhou, China, June 2020.

25. H. Chen, Y. H. Liu, Q. Wang, W. Liu, Z. J. Peng, and G. Wang, "A General ESPRIT Method for Noncircularity-based Incoherently Distributed Sources", Proc. of the 11th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Hangzhou, China, June 2020.

26. L. P. Teng, Q. Wang, H. Chen, W. P. Zhu, W. Liu, and J. J. Cao, "DOA Estimation for Coexistence of Circular and Non-Circular Signals Based on Atomic Norm Minimization", Proc. of the 11th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Hangzhou, China, June 2020.

27. M. H. Dai, X. F. Ma, W. Liu, and W. X. Sheng, "Polarization Parameters Estimation with Scalar Sensor Arrays", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Barcelona, Spain, May 2020.

28. X. Lan, and W. Liu, "Direction Finding for a Mixture of Single-Transmission and Dual-Transmission Signals", Proc. of the IEEE Symposium on Signal Processing and Information Technology (ISSPIT), Ajman, United Arab Emirates, December 2019.

29. Z. Y. Wan, and W. Liu, "Non-Coherent DOA Estimation Based on a Dual-Array Structure without Reference Signals", Proc. of the IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing, Guadeloupe, French West Indies, December 2019.

30. Y. B. Liang, Q. Shen, W. Cui, W. Liu, "Cramer-Rao Bound for Wideband DOA Estimation with Uncorrelated Sources", Proc. of the IEEE Global Conference on Signal and Information Processing (GlobalSIP), Ottawa, Ontario, Canada, November 2019.

31. J. W. Zhang, W. Liu, C. Gu, S. C. Gao, and Qi Luo, "Two-Beam Multiplexing with Inter-Subarray Coding for Arbitrary Directions Based on Interleaved Subarray Architectures", Proc. of the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Istanbul, Turkey, September 2019.

32. J. X. Ma, W. Liu, and L. Zhang, "Iterative Transceiver Beamforming of Distributed Relay Networks in Cognitive Radio Networks", Proc. of the 30th IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Istanbul, Turkey, September 2019. 

33. W. W. Zhao, P. B. Wang, W. Liu, X. K. Zhou, "An Imaging Method for Co-Prime-Sampling Spaceborne SAR", Proc. of the IEEE International Geoscience and Remote Sensing Symposium, Yokohama, Japan, July/August 2019.

34. B. Zhang, W. Liu, and C. Wang, "Two-Dimensional Antenna Array Design for Directional Modulation", Proc. of the 8th International Conference on Communications, Signal Processing, and Systems (CSPS), Urumqi, China, July 2019.

35. B. Zhang, W. Liu, and Y. Li, X. N. Zhao, and C. Wang, "Sparse Planar Antenna Array Design for Directional Modulation", Proc. of the 8th International Conference on Communications, Signal Processing, and Systems (CSPS), Urumqi, China, July 2019.

36. Q. Shen, W. Liu, L. Wang, and Y. Liu, "Group Sparsity Based Target Localization for Distributed Sensor Array Networks", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Brighton, UK, May 2019.

37. A. Raza, W. Liu, and Q. Shen, "Displaced Thinned Coprime Arrays with an Additional Sensor for DOA Estimation", Proc. of the IEEE Symposium on Signal Processing and Information Technology (ISSPIT), Louisville, US, December 2018.

38. H. Chen, W. P. Zhu, W. Liu, M.N.S. Swamy and Y. M. Li, "Joint DOA and Range Estimation for Mixed Near-Field and Far-Field Strictly Noncircular Sources", Proc. of IEEE International conference on Digital Signal Processing, Shanghai, China, November 2018.

39. F. X. Wen and W. Liu, "An Efficient Data-Driven False Data Injection Attack in Smart Grids", Proc. of the IEEE International conference on Digital Signal Processing, Shanghai, China, November 2018.

40. Q. Shen, W. Liu, L. Wang, and Y. Liu, "Joint Adaptive Beamforming Based on Distributed Moving Platforms", Proc. of the IEEE International conference on Digital Signal Processing, Shanghai, China, November 2018.

41. B. Zhang and W. Liu, "Antenna Array Based Positional Modulation with a Two-Ray Multi-Path Model", Proc. of the 10th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Sheffield, UK, July 2018.

42. Q. Li, W. Liu, L. Huang, W. Z. Sun, and P. C. Zhang, "An Undersampled Phase Retrieval Algorithm via Gradient Iteration", Proc. of the 10th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Sheffield, UK, July 2018.

43. H. Chen, W. Liu, W. P. Zhu, and M.N.S. Swamy, "Noncircularity-Based Localization for Mixed Near-Field and Far-Field Sources with Unknown Mutual Coupling", Proc. of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Calgary, Canada, April 2018.

44. B. Zhang, W. Liu, and X. Lan, "Directional Modulation Design Based on Crossed-Dipole Arrays for Two Signals with Orthogonal Polarisations", Proc. of the 12th European Conference on Antennas and Propagation, London, UK, April 2018.

45. J. Henshaw, W. Liu, and D. Romano, "Improving SSVEP-BCI Performance Using Pre-Trial Normalization Methods", Proc. of the IEEE International Conference on Cognitive Infocommunications (CogInfoCom), Debrecen, Hungary, September 2017 (“Best Paper Award”).

46. J. J. Cai, W. Liu, and P. Li, "Sparse Representation Based DOA Estimation Algorithm for a Mixture of Circular and Noncircular Signals Using Sparse Arrays", Proc. of the IEEE International Conference on Signal Processing, Communications and Computing (ICSPCC), Xiamen, China, October 2017.

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

48. 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.

49. 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.

50. 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.

51. 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.

52. 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.

53. 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.

54. 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.

55. 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.

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

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

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

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

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

61. 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.

62. 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. of the 9th IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), Rio de Janeiro, Brazil, July 2016.

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

64. 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.

65. 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.

66. 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.

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

68. 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.

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

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

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

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

73. 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. of the European Signal Processing Conference (EUSIPCO), Nice, France, September 2015.

74. A. 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. of the 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC'15), Milano, Italy, August 2015.

75. 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.

76. 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.

77. 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.

78. 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.

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

80. 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. of the 9th European Conference on Antennas and Propagation (EuCAP), Lisbon, Portugal, April 2015.

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

82. 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.

83. 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.

84. 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.

85. M. 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.

86. 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.

87. 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.

88. 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.

89. 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.

90. 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.

91. 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.

92. 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.

93. 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.

94. 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.

95. 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.

96. 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.

97. 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.

98. 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.

99. 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.

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

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

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

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

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

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

106. 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.

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

108. 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.

109. 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.

110. 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.

111. 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.

112. 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 IEEE Workshop on Statistical Signal Processing (SSP), pp. 637-640, Nice, France, June 2011.

113. 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.

114. 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.

115. 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.

116. 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.

117. 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.

118. 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.

119. 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.

120. 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.

121. 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.

122. 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.

123. 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.

124. 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.

125. 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.

126. 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.

127. 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.

128. 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.

129. 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.

130. 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.

131. 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.

132. 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.

133. 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.

134. 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.

135. 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.

136. 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.

137. 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.

138. 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.

139. 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.

140. 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.

141. 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.

142. 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.

143. 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.

144. 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.

145. 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.

146. 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.

147. 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.

148. W. Liu, D. McLernon, and 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.

149. W. Y. Leong, D. P. Mandic, and W. 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.

150. 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.

151. 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.

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

153. 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.

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

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

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

157. 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.

158. 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.

159. 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.

160. 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.

161. W. Liu and 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.

162. W. Liu and 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.

163. 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.

164. 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.

165. 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.

166. 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.

167. 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.

168. 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.

169. 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.

170. 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.

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

172. 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.

173. 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.

174. 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.

175. W. Liu, S. C. Chan, and 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.

176. W. Liu, S. C. Chan, and 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.

177. S. C. Chan, W. Liu, and 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.