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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. Y. Song, Zubair Khalid, and Marc G. Genton. “Online stochastic generators using Slepian bases for regional bivariate wind speed ensembles from ERA5.” Journal of the American Statistical Association (Submitted), 2024 arXiv:2410.08945.

  2. S. Khan, S. Nadeem, and Z. Khalid, “Efficient Sampling and Accurate Reconstruction of Order-Limited Spherical Signals,” IEEE Signal Processing Letters (Accepted, January 2025).

  3. J. Chowdhury, Z. Khalid, and M. Genton, "Fast and Accurate Spherical Harmonic Transform for Spatio-temporal Regular Grid Data,” IEEE Signal Processing Letters vol. 31, pp. 1825-1829, 2024.

  4. Y. Song, Z. Khalid, and M. Genton, “Efficient stochastic generators with spherical harmonic transformation for high-resolution global climate simulations from CESM2-LENS2”, Journal of the American Statistical Association, 119(548), 2493–2507, 2024.

  5. A. Aslam and Z. Khalid, “Overcomplete Multiscale Dictionary of Slepian Functions for HEALPix on the Sphere,” IEEE Transactions on Signal Processing, vol. 71, pp. 2532–2547, 2023.

  6. A. Kayani, G. K. Woodward, Z. Khalid, and I. H. Naqvi, ‘On the performance of hybrid beamforming for closely-spaced and randomly located users’, Wireless Networks, pp. 1–9, 2023.

  7. M. O. Tarar, I. H. Naqvi, Z. Khalid, and M. Pecht, ‘Accurate prediction of remaining useful life for lithium-ion battery using deep neural networks with memory features’, Frontiers in Energy Research, vol. 11, 2023.

  8. S. Imran, M. Tahir, Z. Khalid, and M. Uppal, “A Deep Unfolded Prior-Aided RPCA Network for Cloud Removal”, IEEE Signal Processing Letters, vol. 29, pp. 2048–2052, 2022.

  9. S. Durrani, J. Guo, and Z. Khalid, ‘Mathematica and Matlab software for computing distance distributions,’ May, 2015.

  10. A. Aslam and Z. Khalid, ‘Linear transformations and signal estimation in the joint spatial-slepian domain’, IEEE Signal Processing Letters, vol. 28, pp. 1195–1199, 2021.

  11. 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.

  12. A. Aslam and Z. Khalid, ‘Spatial-Slepian transform on the sphere’, IEEE Transactions on Signal Processing, vol. 69, pp. 4474–4485, 2021.

  13. A. Aslam, Z. Khalid, and J. D. McEwen, ‘Multiscale optimal filtering on the sphere’, IEEE Signal Processing Letters, vol. 28, pp. 394–398, 2021.

  14. A. Aslam and Z. Khalid, ‘Localized analysis of signals on the sphere over polygon regions’, IEEE Transactions on Signal Processing, vol. 68, pp. 4568–4582, 2020.

  15. W. Nafees, Z. Khalid, and R. A. Kennedy, ‘Differential and weighted Slepian concentration problems on the sphere’, IEEE Transactions on Signal Processing, vol. 68, pp. 2830–2840, 2020.

  16. A. P. Bates, Z. Khalid, and R. A. Kennedy, “Efficient computation of Slepian functions for arbitrary regions on the sphere,” IEEE Transactions on Signal Processing, vol. 65, no. 16, pp. 4379–4393, 2017.

  17. U. Elahi, Z. Khalid, R. A. Kennedy, and J. D. McEwen, “An Optimal-Dimensionality Sampling for Spin-s Functions on the Sphere,” IEEE Signal Processing Letters, vol. 25, no. 10, pp. 1470–1474, 2018.

  18. Z. Khalid, R. A. Kennedy, and J. D. McEwen, “Slepian spatial-spectral concentration on the ball,” Applied and Computational Harmonic Analysis, vol. 40, no. 3, pp. 470–504, 2016.

  19. 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 Transactions on Signal Processing, vol. 65, no. 6, pp. 1527–1537, 2016.

  20. Y. F. Alem, Z. Khalid, and R. A. Kennedy, “Spherical Harmonic Expansion of Fisher–Bingham Distribution and 3-D Spatial Fading Correlation for Multiple-Antenna Systems,” IEEE Transactions on Vehicular Technology, vol. 65, no. 7, pp. 5695–5700, 2015.

  21. A. P. Bates, Z. Khalid, and R. A. Kennedy, “Novel sampling scheme on the sphere for head-related transfer function measurements,” IEEEACM Transactions on Audio, Speech, and Language Processing/, vol. 23, no. 6, pp. 1068–1081, 2015.

  22. Z. Khalid, S. Durrani, R. A. Kennedy, Y. Wiaux, and J. D. McEwen, “Gauss-Legendre sampling on the rotation group,” IEEE Signal Processing Letters, vol. 23, no. 2, pp. 207–211, 2015.

  23. 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 Processing Letters, vol. 23, no. 1, pp. 15–19, 2015.

  24. Y. F. Alem, Z. Khalid, and R. A. Kennedy, “3D spatial fading correlation for uniform angle of arrival distribution,” IEEE Communications Letters, vol. 19, no. 6, pp. 1073–1076, 2015.

  25. Z. Khalid, R. A. Kennedy, and J. D. McEwen, “An optimal-dimensionality sampling scheme on the sphere with fast spherical harmonic transforms,” IEEE Transactions on Signal Processing, vol. 62, no. 17, pp. 4597–4610, 2014.

  26. Z. Khalid, S. Durrani, and J. Guo, “A tractable framework for exact probability of node isolation and minimum node degree distribution in finite multihop networks,” IEEE Transactions on Vehicular Technology, vol. 63, no. 6, pp. 2836–2847, 2013.

  27. Z. Khalid, P. Sadeghi, R. A. Kennedy, and S. Durrani, “Spatially varying spectral filtering of signals on the unit sphere,” IEEE Transactions on Signal Processing, vol. 61, no. 3, pp. 530–544, 2012.

  28. P. Sadeghi, R. A. Kennedy, and Z. Khalid, “Commutative anisotropic convolution on the 2-sphere,” IEEE Transactions on Signal Processing, vol. 60, no. 12, pp. 6697–6703, 2012.

  29. Z. Khalid and S. Durrani, “Distance distributions in regular polygons,” IEEE Transactions on Vehicular Technology, vol. 62, no. 5, pp. 2363–2368, 2013.

  30. Z. Khalid, R. A. Kennedy, S. Durrani, P. Sadeghi, Y. Wiaux, and J. D. McEwen, “Fast directional spatially localized spherical harmonic transform,” IEEE Transactions on Signal Processing, vol. 61, no. 9, pp. 2192–2203, 2013.

  31. Z. Khalid, S. Durrani, P. Sadeghi, and R. A. Kennedy, “Spatio-spectral analysis on the sphere using spatially localized spherical harmonics transform,” IEEE Transactions on Signal Processing, vol. 60, no. 3, pp. 1487–1492, 2011.


Conference Papers


  1. S. Ashraf, Z. Khalid, M. Tahir, and M. Uppal, “Identification and Quantification of Aerosol Hot-spots over Lahore Region using MODIS Data”, 2025 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2025), Brisbane, Australia.

  2. S. Abdulah, A. H. Baker, G. Bosilca, Q. Cao, S. Castruccio, M. G. Genton, D. E. Keyes, Z., H. Ltaief, Y. Song, G. L. Stenchikov, and Y. Sun. Boosting Earth System Model Outputs And Saving PetaBytes in Their Storage Using Exascale Climate Emulators. 2024 International Conference for High Performance Computing, Networking, Storage, and Analysis (SC ’24).

  3. M. Rahman, M. Waseem, Z. Khalid, M. Tahir, and M. Uppal, “PD-SEG: Population Disaggregation using Deep Segmentation Networks for Improved Built Settlement Mask,“ 2023 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2023), Pasadena, California.

  4. U. Nazir, M. Uppal, M. Tahir, Z. Khalid, M. Waseem, F. Khan, R. Saeed, S. Hasan and Z. Khalid, “Improved Flood Mapping for Efficient Policy Design by Fusion of Sentinel-1, Sentinel-2 and Landsat-9 Imagery to Identify Population and Infrastructure Exposed to Floods,” 2023 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2023), Pasadena, California.

  5. U. Nazir, M. Uppal, M. Tahir, and Z. Khalid, “Feature Selection on Sentinel-2 Multi-Spectral Imagery for Efficient Tree Cover Estimation,” 2023 IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2023), Pasadena, California.

  6. S. Khan, S. Nadeem, and Z. Khalid, “Sampling Order-Limited Signals on the Sphere,“ 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Greece, 2023.

  7. M. N. Tahir, Z. Khalid, and A. Aslam, ‘Online, Real-time and Robust Detection and Localization of Foreign Objects on Paper Surface using Machine Vision and Clustering’, in 2022 28th International Conference on Mechatronics and Machine Vision in Practice (M2VIP), 2022, pp. 1–6.

  8. M. A. Rahman, M. Aamir Basheer, Z. Khalid, M. Tahir, and M. Uppal, ‘Last Mile Logistics: Impact of Unstructured Addresses on Delivery Times’, ISPRS-International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. 48, pp. 3–8, 2022.

  9. A. Aslam and Z. Khalid, ‘Operator Formulation for Linear Transformations and Signal Estimation in the Joint Spatial-Slepian Domain’, in ICASSP 2022-2022 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2022, pp. 5727–5731.

  10. 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.

  11. 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.

  12. 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)

  13. 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)

  14. 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)

  15. 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)

  16. 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)

  17. 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)

  18. 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)

  19. 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)

  20. 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)

  21. 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)

  22. 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)

  23. 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)

  24. 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)

  25. 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)

  26. 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)

  27. 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)

  28. 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)

  29. 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)

  30. 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)

  31. 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)

  32. 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)

  33. 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)

  34. 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)

  35. 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)

  36. 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)

  37. 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)

  38. 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)

  39. 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)

  40. 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)

  41. 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)

  42. 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)

  43. 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)

  44. 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)

  45. 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)

  46. 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)

  47. 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)

  48. 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)

  49. 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)

  50. 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)

  51. 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)