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Zubair Khalid

Academic Webpage

Department of Electrical Engineering
Syed Babar Ali School of Science and Engineering
Lahore University of Management Sciences.



List of Publications


Journals


  1. A. Aslam and Z. Khalid, “Linear Transformations and Signal Estimation in the Joint Spatial-Slepian Domain,” IEEE Signal Processing Letters (accepted).

  2. A. Aslam, Z. Khalid and J. D. McEwen, “Multiscale Optimal Filtering on the Sphere,” IEEE Signal Processing Letters vol. 28, pp. 394–398, 2021. (pdf)

  3. A. Aslam and Z. Khalid, “Spatial-Slepian Transform on the Sphere,” IEEE Trans. Signal Process. (accepted). (pdf)

  4. A. Aslam and Z. Khalid, “Joint SO(3)-Spectral Domain Filtering of Spherical Signals in the Presence of Anisotropic Noise,” IEEE Signal Processing Letters. vol. 27, pp. 2109–2113, 2020. (pdf)

  5. A. Aslam and Z. Khalid, “Localized Analysis of Signals on the Sphere over Polygon Regions,” IEEE Trans. Signal Process. vol. 68, pp. 4568–4582, 2020. (pdf)

  6. S. Ashraf, Z. Khalid, M. Tahir, and M. Uppal, “Identification and Quantification of Aerosal Hot-spots over Lahore Region Using MODIS Data,” IEEE Geoscience and Remote Sensing Letters. (Submitted, Nov. 2019). (pdf)

  7. W. Nafees, Z. Khalid and R. A. Kennedy, “Differential and Weighted Slepian Concentration Problems on the Sphere,” IEEE Trans. Signal Process. vol. 68, no. 1, pp. 2830–2840, Dec. 2020. (pdf)

  8. Alice P. Bates, Zubair Khalid, Jason D. McEwen Rodney A. Kennedy, Alessandro Daducci and Erick J. Canales-Rodriguez, “ Optimal-Dimensionality Sampling and Robust 3D Diffusion Signal Reconstruction,” IEEE Trans. Signal Process. (submitted).(arXiv) (pdf)

  9. U. Elahi, Z. Khalid and R. A. Kennedy “An Optimal-Dimensionality Sampling for Spin-s Functions on the Sphere,” IEEE Signal Processing Letters. (Accepted: August 2018). (arXiv) (pdf)

  10. A. P. Bates, Z. Khalid, and R. A. Kennedy, “Efficient Computation of Slepian Functions for Arbitrary Regions on the Sphere,” IEEE Trans. Signal Process., vol. 65, no. 16, pp. 4379–4393, Aug. 2017.(pdf)

  11. A. P. Bates, Z. Khalid, and R. A. Kennedy, “Slepian Spatial-Spectral Concentration Problem on the Sphere: Analytical Formulation for Limited Colatitude-Longitude Spatial Region,” IEEE Trans. Signal Process., vol. 65, no. 6, pp. 1527–1537, Mar. 2017. (pdf)

  12. Y. Alem, Z. Khalid, and R. A. Kennedy, “Spherical Harmonic Expansion of Fisher-Bingham Distribution and 3D Spatial Fading Correlation for Multiple-Antenna Systems,” IEEE Trans. Veh. Technol., vol. 65, no. 7, pp 5695–5700, Jul. 2016. (arXiv) (pdf)

  13. Z. Khalid, R. A. Kennedy and J. D. McEwen, “Slepian Spatial-spectral Concentration on the Ball,” Applied Comput. Harm. Anal., vol. 40, no. 3, pp 470,504, May 2016. (arXiv) (pdf)

  14. Z. Khalid, S. Durrani, R. A. Kennedy, Y. Wiaux and J. D. McEwen, “Gauss-Legendre Sampling on the Rotation Group,” IEEE Signal Process. Lett., vol. 23, no. 2, pp 207–211, Feb. 2016. (arXiv) (pdf)

  15. A. P. Bates, Z. Khalid and R. A. Kennedy, “An Optimal Dimensionality Sampling Scheme on the Sphere with Accurate and Efficient Spherical Harmonic Transform for Diffusion MRI,” IEEE Signal Process. Lett., vol. 23, no. 1, pp 15–19, Jan. 2016. (IEEE Xplore) (pdf)

  16. Y. F. Alem, Z. Khalid and R. A. Kennedy, “3D Spatial Fading Correlation for Uniform Angle of Arrival Distribution,” IEEE Commun. Lett., vol. 9, no. 6, pp. 1073-1076, June 2015. (IEEE Xplore) (pdf)

  17. A. P. Bates, Z. Khalid and R. A. Kennedy, “Novel Sampling Scheme on the Sphere for Head-Related Transfer Function Measurements,” IEEE ACM Trans. Audio Speech Language Process., vol. 23, no. 6, pp. 1068-1081, June 2015. (IEEE Xplore) (pdf)

  18. Z. Khalid, R. A. Kennedy and J. D. McEwen, “An Optimal-Dimensionality Sampling Scheme on the Sphere for Fast Spherical Harmonic Transforms,” IEEE Trans. Signal Process., vol. 62, no. 17, pp. 4597-4610, September 2014. (IEEE Xplore) (arXiv) (pdf)

  19. Z. Khalid, S. Durrani and J. Guo, “A Tractable Framework for Exact Probability of Node Isolation and Minimum Node Degree Distribution in Finite Multi-hop Networks,” IEEE Trans. Veh. Tech., vol. 63, no. 6, pp. 2836-2847, July 2014. (IEEE Xplore) (arXiv) (pdf)

  20. Z. Khalid and Salman Durrani, “Distance distributions in regular polygons,” IEEE Trans. Veh. Tech., vol. 62, no. 5, pp. 2363-2368, June 2013. (pdf)

  21. Z. Khalid, R. A. Kennedy, S. Durrani, P. Sadeghi, Y. Wiaux and J. D. McEwen, “Fast directional spatially localized spherical harmonic transform,” IEEE Trans. Signal Process., vol. 61, no. 9, pp. 2192-2203, 2013. (pdf)

  22. Z. Khalid, P. Sadeghi, R. A. Kennedy and S. Durrani, “Spatially varying spectral filtering of signals on the unit sphere,” IEEE Trans. Signal Process., vol. 61, no. 3, pp. 530-544, February 2013. (pdf)

  23. P. Sadeghi, R. A. Kennedy and Z. Khalid, “Commutative anisotropic convolution on the 2-sphere,” IEEE Trans. Signal Process., vol. 60, no. 12, pp. 6697-6703, December 2012. (pdf)

  24. Z. Khalid, S. Durrani, P. Sadeghi and R. A. Kennedy, “Spatio-spectral analysis on the sphere using spatially localized spherical harmonics transform,” IEEE Trans. Signal Process., vol. 60, no. 3, pp. 1487-1492, March 2012. (pdf)


Conference Papers


  1. Y. Sattar and Z. Khalid, “Estimation of Ground Water Storage Variations in Indus River Basin using GRACE Data,” 2021 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Toronto, Canada, 2021.

  2. M. O. Tarar and Z. Khalid, “Reconstruction of Finite Rate of Innovation Spherical Signals in the Presence of Noise Using Deep Learning Architecture”, in Proc. 28th European Signal Processing Conference (EUSIPCO 2020), Amsterdam, NL, Jan. 2021.

  3. A. Aslam and Z. Khalid, “Optimal Window Design For Joint Spatial-Spectral Domain Filtering Of Signals On The Sphere,” 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Barcelona, Spain, 2020. (pdf)

  4. U. Elahi, Z. Khalid and R. A. Kennedy, “Design of a Spatially Constrained Anti-aliasing Filter using Slepian Functions on the Sphere,” in Proc. 12th International Conference on Signal Processing and Communication Systems, ICSPCS’2019, Gold Coast, Australia, Dec. 2019. (pdf)

  5. A. Aslam and Z. Khalid, “Construction of Overcomplete Multiscale Dictionary of Slepian Functions on the Sphere,” 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, 2019. (pdf)

  6. Y. Sttar, Z. Khalid and R. A. Kennedy, “Accurate Reconstruction of Finite Rate of Innovation Signals on the Sphere,” 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, 2019. (pdf)

  7. U. Ahmed and Z. Khalid, “Sampling Schemes for Accurate Reconstruction and Computation of Performance Parameters of Antenna Radiation Pattern,” 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, 2019. (pdf)

  8. W. Nafees and Z. Khalid, “Antipodal Symmetric Optimal Dimensionality Sampling on the Sphere with Fast Spherical Harmonic Transform,” 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, 2019. (pdf)

  9. U. Elahi, Z. Khalid and R. A. Kennedy, “Spatially Constrained Anti-aliasing Filter using Slepian Functions on the Sphere,” in Proc. 12th International Conference on Signal Processing and Communication Systems, ICSPCS’2018, Carins, Australia, Dec. 2018. (pdf)

  10. U. Elahi, Z. Khalid and R. A. Kennedy, “An improved iterative algorithm for band-limited signal extrapolation on the sphere,” 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, 2018. (pdf)

  11. W. Nafees, Z. Khalid and R. A. Kennedy, “Spatially-limited sampling of band-limited signals on the sphere,” 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, 2018. (pdf)

  12. A. Aslam, Z. Khalid and R. A. Kennedy, “Efficient sampling on healpix grid,” 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Calgary, Canada, 2018. (pdf)

  13. W. Nafees, Z. Khalid, R. A. Kennedy and J. D. McEwen, “Optimal-dimensionality sampling on the sphere: Improvements and variations,” 2017 International Conference on Sampling Theory and Applications (SampTA), Tallin, 2017, pp. 87-91. (pdf)

  14. U. Elahi, Z. Khalid, R. A. Kennedy and J. D. McEwen, “Iterative residual fitting for spherical harmonic transform of band-limited signals on the sphere: Generalization and analysis,” 2017 International Conference on Sampling Theory and Applications (SampTA), Tallin, 2017, pp. 470-474. (pdf)

  15. W. Nafees, Z. Khalid and R. A. Kennedy, “Signal analysis on the ball: Design of optimal basis functions with maximal multiplicative concentration in spatial and spectral domains,” 2017 International Conference on Systems, Signals and Image Processing (IWSSIP), Poznan, 2017. (pdf)

  16. A. P. Bates, Z. Khalid, J. D. McEwen and R. A. Kennedy, “An optimal dimensionality multi-shell sampling scheme with accurate and efficient transforms for diffusion MRI,” 2017 IEEE 14th International Symposium on Biomedical Imaging (ISBI 2017), Melbourne, VIC, 2017, pp. 770-77. (pdf)

  17. Y. Sattar, Z. Khalid and R. A. Kennedy, “Robust reconstruction of spherical signals with finite rate of innovation,” 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), New Orleans, LA, 2017, pp. 4024-4028. (pdf)

  18. Z. Khalid, R. A. Kennedy and S. Durrani, “Improving the spatial dimensionality of Gauss-Legendre and equiangular sampling schemes on the sphere,” 2017 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), New Orleans, LA, 2017, pp. 4531-4535. (pdf)

  19. A. P. Bates, Z. Khalid, R. A. Kennedy, and J. D. McEwen, “Multi-shell sampling scheme with accurate and efficient transforms for diffusion MRI,” in Biomedical and Astronomical Signal Processing Frontiers (BASP), 2017. (pdf)

  20. U. Elahi, Z. Khalid and R. A. Kennedy, “Comparative analysis of geometrical properties of sampling schemes on the sphere,” 2016 10th International Conference on Signal Processing and Communication Systems (ICSPCS), Gold Coast, QLD, 2016, pp. 1-7. (pdf)

  21. A. P. Bates, Z. Khalid and R. A. Kennedy, “On the Use of Antipodal Optimal Dimensionality Sampling Scheme on the Sphere for Recovering Intra-voxel Fibre Structure in Diffusion MRI,” in Workshop on Computational Diffusion MRI, International Conference on Medical Image Computing and Computer Assisted Intervention MICCAI 2015, Munich, Germany, October 2015. (pdf)

  22. Z. Khalid and R. A. Kennedy, “Spherical Harmonic Transform for Minimum Dimensionality Regular Grid Sampling on the Sphere,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP’2015, Brisbane, Australia, April 2015. (pdf)

  23. Z. Khalid and R. A. Kennedy, “Maximal Multiplicative Spatial-Spectral Concentration on the Sphere: Optimal Basis,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP’2015, Brisbane, Australia, April 2015. (pdf)

  24. A. P. Bates, Z. Khalid and R. A. Kennedy, “An Optimal Dimensionality Sampling Scheme on the Sphere for Antipodal Signals in Diffusion Magnetic Resonance Imaging,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP’2015, Brisbane, Australia, April 2015. (pdf)

  25. Z. Khalid and R. A. Kennedy, “On the Placement of Latitudes in Iso-Latitude Optimal-Dimensionality Sampling Schemes on the Sphere,” in Proc. 8th International Conference on Signal Processing and Communication Systems, ICSPCS’2014, Gold Coast, Australia, Dec. 2014, p. 7. (pdf)

  26. Z. Khalid and R. A. Kennedy, “Iterative Method to Compute the Maximal Concentration Slepian Band-limited Eigenfunction on the Sphere,” in Proc. 8th International Conference on Signal Processing and Communication Systems, ICSPCS’2014, Gold Coast, Australia, Dec. 2014, p. 7. (pdf)

  27. Z. Khalid, R. A. Kennedy, S. Durrani and P. Sadeghi, “Adaptive Multi-Resolution Windowing Technique for Localized Spatio-Spectral Analysis,” in Proc. IEEE Workshop on Statistical Signal Processing, SSP’2014, June 2014. (pdf)

  28. P. Sadeghi, R. A. Kennedy and Z. Khalid, “Minimum Mean Square Error Equalization on the 2-Sphere,” in Proc. IEEE Workshop on Statistical Signal Processing, SSP’2014, June 2014. (pdf)

  29. Y. Alem, Z. Khalid and R. A. Kennedy, “Band-Limited Extrapolation on the Sphere for Signal Reconstruction in the Presence of Noise,” in Proc. IEEE Int. Conf. Acoustics, Speech and Signal Processing, ICASSP’2014, pp. 4169-4173, May 2014. (pdf)

  30. R. A. Kennedy, Z. Khalid and P. Sadeghi, “Efficient Kernel-Based Formulations of Spatio-Spectral and Related Transformations on the 2-Sphere,” in Proc. IEEE Int. Conf. Acoustics, Speech and Signal Processing, ICASSP’2014, pp. 310-314, May 2014. (pdf)

  31. Z. Khalid, R. A. Kennedy and S. Durrani, “On the Choice of Window for Spatial Smoothing of Spherical Data,” in Proc. IEEE Int. Conf. Acoustics, Speech and Signal Processing, ICASSP’2014, pp. 2663-2667, May 2014. (pdf)

  32. R. A. Kennedy, Z. Khalid and Y. F. Alem, “Spatial Correlation from Multipath with 3D Power Distributions having Rotational Symmetry,” in Proc. 7th International Conference on Signal Processing and Communication Systems, ICSPCS’2013, pp. 7, December 2013. (pdf)

  33. R. A. Kennedy, P. Sadeghi, Z. Khalid and J. D. McEwen, “Classification and construction of closed-form kernels for signal representation on the 2-sphere,” in Proc. Wavelets and Sparsity XIV, SPIE international symposium on optics and photonics, invited contribution, August 2013. (pdf)

  34. Zubair Khalid, Rodney A. Kennedy, Parastoo Sadeghi and Salman Durrani, “Spatio-spectral Formulation and Design of Spatially-Varying Filters for Signal Estimation on the 2-Sphere,” in Proc. Wavelets and Sparsity XIV, SPIE international symposium on optics and photonics, invited contribution, August 2013. (pdf)

  35. Zubair Khalid and Salman Durrani, “Connectivity of three dimensional wireless sensor networks using geometrical probability,” in Proc. Australian Communications Theory Workshop (AusCTW), pp. 47-51, 2013. (pdf)

  36. Z. Khalid, R.A. Kennedy and P. Sadeghi, “Efficient computation of commutative anisotropic convolution on the 2-sphere,” in Proc. 6th International Conference on Signal Processing and Communication Systems, ICSPCS’2012, pp. 7, December 2012. (pdf)

  37. Z. Khalid, S. Durrani, P. Sadeghi, and R. A. Kennedy, “Concentration uncertainty principles for signals on the unit sphere,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP2012, Mar. 2012, pp. 3717-3720. (pdf)

  38. Z. Khalid, R. A. Kennedy, S. Durrani, and P. Sadeghi, “Conjugate gradient algorithm for extrapolation of sampled bandlimited signals on the 2-sphere,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP2012, Kyoto, Japan, Mar. 2011. (pdf)

  39. Z. Khalid, S. Durrani, P. Sadeghi, and R. A. Kennedy, “Ambiguity function and Wigner distribution on the sphere,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP2012, Kyoto, Japan, Mar. 2011. (pdf)

  40. W. Huang, Z. Khalid, and R. A. Kennedy, “Efficient computation of spherical harmonic transform using parallel architecture of cuda,” in Proc. 5th International Conference on Signal Processing and Communication Systems, ICSPCS2011, Honolulu, HI, Dec. 2011, p. 6. (pdf)

  41. Z. Khalid, S. Durrani, R. A. Kennedy, and P. Sadeghi, “Revisiting Slepian concentration problem on the sphere for azimuthally non-symmetric regions,” in Proc. 5th International Conference on Signal Processing and Communication Systems, ICSPCS2011, Honolulu, HI, Dec. 2011, p. 7. (pdf)

  42. Z. Khalid, S. Durrani, R. A. Kennedy, and P. Sadeghi, “On the construction of lowpass filters on the unit sphere,” in Proc. IEEE Int. Conf. Acoust., Speech, Signal Process., ICASSP2011, Prague, Czech Republic, May 2011, pp. 4356-4359. (pdf)


Conference Abstracts


  1. R. A. Kennedy, P. Sadeghi, and Z. Khalid, “Optimal signal processing on the 2-sphere: A general operator approach to signal recovery,” in Proc. International Biomedical and Astronomical Signal Processing (BASP) Frontiers workshop, Switzerland, 2013.

  2. J. Guo, S. Durrani and Z. Khalid, “Exact Probability of Node Isolation in Finite Wireless Sensor Networks,” in Proc. 14th Australian Communications Theory Workshop (AusCTW), Adelaide, Australia, 2013.


Ph.D. Thesis


  1. Z. Khalid, “Spatio-spectral analysis on the Unit Sphere,” Ph.D. Thesis, Australian National University, 2013. (PDF copy here)