Research Publications

Ultra-Wideband Antennas and Propagation for Communications, Radar and Imaging

Books

  1. B. Allen, M. Dohler, E. E. Okon, W. Q. Malik, A. K. Brown, and D. J. Edwards (Eds.), Ultra-Wideband Antennas and Propagation for Communications, Radar and Imaging. London, UK: Wiley, 2006
Book Chapters
  1. W. Q. Malik, J. Liu, B. Allen, and D. J. Edwards, "Ultrawideband spatial channel characteristics," in B. Allen et al. (Eds.), Ultra-Wideband Antennas and Propagation for Communications, Radar and Imaging. Wiley, 2006
  2. J. Liu, W. Q. Malik, D. J. Edwards, and M. Ghavami, "Antenna diversity techniques," in B. Allen et al. (Eds.), Ultra-Wideband Antennas and Propagation for Communications, Radar and Imaging. Wiley, 2006
  3. G. Fettweis et al., (Eds.), "Short range wireless communications," in R. Tafazolli (Ed.), Technologies for the Wireless Future: Wireless World Research Forum (WWRF), vol. 2. Wiley, 2006
  4. W. Q. Malik and A. Pollok, "Smart antennas and MIMO systems" in S. Gezici, I. Guvenc, Z. Sahinoglu (Eds.), Ultra-Reliable Short-Range Wireless Communications. Cambridge University Press, 2009, in print
Patents
  1. D. J. Edwards, T. Hao, W. Q. Malik, and C. J. Stevens, "Planar tripolar antenna," International Patent WO 2008/081200 A1, July 2008 [Feature on BBC News, Apr. 22, 2008]
  2. Y. Zhang, W. Q. Malik, C. Ji, D. C. O’Brien, and D. J. Edwards, “MIMO system algorithm,” British patent GB 0720779.8, pending
  3. N. Nyirongo, W. Q. Malik, and D. J. Edwards, “Symbol spreading for OFDM systems ,” British patent GB 0719513.4, pending
  4. W. Q. Malik, C. J. Stevens, and D. J. Edwards, "Antenna apparatus and antenna aberration compensation method," British Patent, pending
Journal Special Issues
  1. W. Q. Malik, B. Allen, A. K. Brown, and D. J. Edwards (Eds.), "Antenna systems and propagation for future wireless communications," special issue of IET Microw. Antennas Propagat., vol. 1, no. 6, Dec. 2007 [ Editorial: ]
Journal Papers
  1. Y. Zhang, C. Ji, W. Q. Malik, D. C. O'Brien, and D. J. Edwards, "Receive antenna selection for MIMO systems over correlated fading channels," IEEE Trans. Wireless Commun., vol. 8, no. 9, pp. 4393-4399, Sep. 2009
  2. Y. Liu, Y. Zhang, C. Ji, W. Q. Malik, and D. J. Edwards, "A low complexity receive antenna selection algorithm for MIMO-OFDM wireless systems," IEEE Trans. Veh. Technol., vol. 58, no. 6, pp. 2793-2802, Jul. 2009
  3. G. Tiberi, S. Bertini, W. Q. Malik, A. Monorchio, D. J. Edwards, and G. Manara, "Analysis of realistic ultrawideband indoor communication channels by using an efficient ray-tracing based method," IEEE Trans. Antennas Propagat., vol. 57, no. 3, pp. 777-785, Mar. 2009
  4. J. Adeane, W. Q. Malik, and I. J. Wassell, “Error performance of ultrawideband spatial multiplexing systems,” IET Mircow. Antennas Propagat., vol. 3, no. 3, pp. 363-371, Mar. 2009
  5. W. Q. Malik, “MIMO capacity convergence in frequency-selective channels,” IEEE Trans. Commun., vol. 57, no. 2, pp. 353-356, Feb. 2009
  6. W. Q. Malik, B. Allen, and D. J. Edwards, “Bandwidth-dependent modelling of small-scale fade depth in wireless channels,” IET Microw. Antennas Propagat., vol. 2, no. 6, pp. 519-528, Sep. 2008
  7. Y. Zhang, A. K. Brown, W. Q. Malik, and D. J. Edwards, “High resolution 3-D angle of arrival determination for indoor UWB multipath propagation,” IEEE Trans. Wireless Commun., vol. 7, no. 8, pp. 3047-3055, Aug. 2008
  8. W. Q. Malik, C. J. Stevens, and D. J. Edwards, “Ultrawideband antenna distortion compensation,” IEEE Trans. Antennas Propagat., vol. 56, no. 7, pp. 1900-1907, Jul. 2008
  9. Y. Zhang, C. Ji, Y. Liu, W. Q. Malik, D. C. O'Brien, and D. J. Edwards, “A low complexity user scheduling algorithm for uplink multiuser MIMO systems,” IEEE Trans. Wireless Commun., vol. 7, no. 7, pp. 2486-2491, Jul. 2008
  10. W. Q. Malik, “MIMO capacity and multipath scaling in ultrawideband channels,” IET Electron. Lett., vol. 44, no. 6, pp. 427-428, Mar. 2008
  11. W. Q. Malik, “Spatial correlation in ultrawideband channels,” IEEE Trans. Wireless Commun., vol. 7, no. 2, pp. 604-610, Feb. 2008
  12. W. Q. Malik, “Polarimetric characterization of ultrawideband propagation channels,” IEEE Trans. Antennas Propagat., vol. 56, no. 2, pp. 532-539, Feb. 2008
  13. W. Q. Malik, C. J. Stevens, and D. J. Edwards, “Multipath effects in ultrawideband rake reception,” IEEE Trans. Antennas Propagat., vol. 56, no. 2, pp. 507-514, Feb. 2008
  14. W. Q. Malik and D. J. Edwards, "Measured MIMO capacity and diversity gain with spatial and polar arrays in ultrawideband channels," IEEE Trans. Commun., vol. 55, no. 12, pp. 2361-2370, Dec. 2007
  15. X. Hong, C.-X. Wang, B. Allen, and W. Q. Malik, "Correlation based double-directional stochastic channel model for multiple-antenna UWB systems," IET Microw. Antennas Propagat., vol. 1, no. 6, pp. 1182-1191, Dec. 2007
  16. J. Adeane, W. Q. Malik, I. J. Wassell, and D. J. Edwards, "A simple correlated channel model for ultrawideband MIMO systems," IET Microw. Antennas Propagat., vol. 1, no. 6, pp. 1177-1181, Dec. 2007
  17. Y. Zhang, C. Ji, W. Q. Malik, D. C. O'Brien, and D. J. Edwards, "Cross entropy optimization of MIMO capacity by transmit antenna selection," IET Microw. Antennas Propagat., vol. 1, no. 6, pp. 1131-1136, Dec. 2007
  18. W. Q. Malik, B. Allen, and D. J. Edwards, “Fade depth scaling with channel bandwidth,” IET Electron. Lett., vol. 43, no. 24, pp. 1371-1372, Nov. 2007
  19. W. Q. Malik, C. J. Stevens, and D. J. Edwards, "Spatio-temporal ultrawideband indoor propagation modelling by reduced complexity geometric optics," IET Commun., vol. 1, no. 4, pp. 751-759, Aug. 2007
  20. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Frequency dependence of fading statistics for ultrawideband systems,” IEEE Trans. Wireless Commun., vol. 6, no. 3, pp. 800-804, Mar. 2007
  21. B. Allen, W. Q. Malik, P. J. Smith, and D. J. Edwards, "Demystifying MIMO," IET Commun. Engineer, vol. 4, no. 6, pp. 38-42, Dec./Jan. 2006/07
  22. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Angular-spectral antenna effects in ultra-wideband communications links,” IEE Proc.-Commun., vol. 153, no. 1, pp. 99-106, Feb. 2006
  23. Z. Tarique, W. Q. Malik, and D. J. Edwards, “Bandwidth requirements for accurate detection of direct path in multipath environment,” IET Electon. Lett., vol. 42, no. 2, pp. 100-102, Jan. 2006
  24. M. C. Mtumbuka, W. Q. Malik, C. J. Stevens, and D. J. Edwards, “Performance of spatial diversity in ultra-wideband systems,” IET Commun., in press
Refereed Conference Papers

    Keynote/Invited Papers

  1. X. Hong, C.-X. Wang, J. Thompson, B. Allen, and W. Q. Malik, "Deconstructing space-frequency correlated ultrawideband MIMO channels," in Proc. IEEE Int. Conf. Ultrawideband (ICUWB). Hannover, Germany, Sep. 2008
  2. S. Bashir, W. Q. Malik, and S. I. Shah, "Affine restoration decoding for MIMO-OFDM ultrawideband communications," in Proc. IEEE Int. Conf. Ultrawideband (ICUWB). Hannover, Germany, Sep. 2008
  3. B. Allen, W. Q. Malik, and D. J. Edwards, "Wireless networks: What next for radiowave propagation research," in Proc. Loughborough Antennas Propagat. Conf. (LAPC). Loughborough, UK, Apr. 2008
  4. W. Q. Malik and B. Allen, "Wireless sensor positioning with ultrawideband fingerprinting," in Proc. Eur. Conf. Antennas Propagat. (EuCAP). Edinburgh, UK, Nov. 2007
  5. W. Q. Malik, D. J. Edwards, Y. Zhang, and A. K. Brown “Three-dimensional equalization of ultrawideband antenna distortion,” in Proc. Int. Conf. Electromagn. Adv. Apps. (ICEAA) Torino, Italy, Sept. 2007
  6. W. Q. Malik and A. F. Molisch, “Ultrawideband antenna arrays and directional propagation channels,” in Proc. Eur. Conf. Antennas Propagat. (EuCAP). Nice, France, Nov. 2006
  7. W. Q. Malik and D. J. Edwards, “Cognitive techniques for ultrawideband communications,” in Proc. IEE Symp. Ultra Wideband Sys. Tech. App. London, UK, Apr. 2006
  8. W. Q. Malik and D. J. Edwards, “Extracting information from the spatio-temporal ultrawideband channel,” in Proc. Loughborough Antennas Propagat. Conf. (LAPC). Loughborough, UK, Apr. 2006
  9. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “The impact of physical layer frontend characteristics on ultra-wideband radio,” in Proc. Int. Conf. Telecom. (ICT). Cape Town, South Africa, May 2005
  10. B. Allen, T. Brown, K. Schwieger, E. Zimmermann, W. Q. Malik, D. J. Edwards, L. Ouvry, and I. Oppermann, “Ultra wideband: applications, technology and future perspectives,” in Proc. Int. Workshop Convergent Tech. (IWCT). Oulu, Finland, June 2005


    11. Contributed Papers

  11. W. Q. Malik, J. Schummers, B. Jarosiewicz, M. Sur, and E. N. Brown, "A statistical modeling framework for analysis of two-photon calcium imaging data," in Proc. Neurosci. '09. Chicago, IL, Oct. 2009, in press
  12. B. Jarosiewicz, J. Schummers, W. Q. Malik, E. N. Brown, and M. Sur, "Differences in the tuning properties of ferret V1 neurons that project to the dorsal vs. ventral visual streams," in Proc. Neurosci. '09. Chicago, IL, Oct. 2009, in press
  13. W. Q. Malik, J. Schummers, B. Jarosiewicz, M. Sur, and E. N. Brown, "Denoising two-photon calcium imaging data," in Proc. NeuroComp. '09. Bordeaux, France, Sep. 2009, in press
  14. W. Q. Malik, J. Schummers, M. Sur, and E. N. Brown, "A statistical model for multiphoton calcium imaging of the brain," in Proc. IEEE Eng. Med. Biol. (EMBC) . Minneapolis, MN, Sep. 2009
  15. W. Q. Malik, T. Denninger, M. P. Karlsson, L. M. Frank, and E. N. Brown, "Quantifying spatial and non-spatial signals in hippocampal place cell spike trains," in Proc. Neurosci. '08. Washington, DC, Nov. 2008
  16. A. Athar and W. Q. Malik, "Non-uniform temporal dispersion in indoor wideband channels," in Proc. IET Wideband & Ultrawideband Sys. Tech.. London, UK, Nov 2008
  17. F. Zhang, Y. Zhang, W. Q. Malik, B. Allen, and D. J. Edwards, "Optimum receiver antenna selection for transmit cyclic delay diversity," in Proc. IEEE Int. Conf. Commun. (ICC). Beijing, China, May 2008
  18. W. Q. Malik and D. J. Edwards, "UWB impulse radio with triple-polarization SIMO," in Proc. IEEE Global Commun. Conf. (Globecom). Washington, DC, USA, Nov. 2007
  19. W. Q. Malik, B. Allen, and D. J. Edwards, “Impact of bandwidth on small-scale fade depth,” in Proc. IEEE Global Commun. Conf. (Globecom). Washington, DC, USA, Nov. 2007
  20. Y. Liu, Y. Zhang, C. Ji, W. Q. Malik C. J. Stevens, and D. J. Edwards, "Transmit antenna subset selection for MIMO-OFDM wireless communication systems," in Proc. IET Smart Antennas & Cooperative Commun. Workshop. London, UK, Oct. 2007
  21. G. Tiberi, S. Bertini, W. Q. Malik, A. Monorchio, D. J. Edwards, and G. Manara, "An efficient ray tracing propagation simulator for analyzing ultrawideband channels," in Proc. IEEE Int. Conf. Ultrawideband (ICUWB). Singapore, Sept. 2007
  22. Y. Zhang, C. Ji, W. Q. Malik, Y. Liu, D. C. O'Brien, and D. J. Edwards, "Joint antenna and user selection algorithm for uplink multiuser MIMO systems using sequential Monte Carlo optimization," in Proc. IEEE Statistical Sig. Proc. Workshop (SSP). Madison, WI, USA, Aug. 2007
  23. S. H. Choi, P. J. Smith, B. Allen, W. Q. Malik, and M. Shafi, "Severely fading MIMO channels: models and mutual information," in Proc. IEEE Int. Conf. Commun. (ICC). Glasgow, UK, June 2007
  24. G. Tiberi, S. Bertini, W. Q. Malik, A. Monorchio, D. J. Edwards, and G. Manara, "UWB channel modeling by using an efficient ray tracing procedure," in Proc. IEEE Antennas Propagat. Soc. Int. Symp. Honolulu, USA, June 2007
  25. J. Adeane, I. J. Wassell, and W. Q. Malik, "Error performance of ultrawideband MIMO spatial multiplexing systems," in Proc. IET UWB Symp. joint with Eur. UWB Radio Technol. Workshop. Grenoble, France, May 2007
  26. J. Adeane, I. J. Wassell, and W. Q. Malik, "Cooperative diversity for ultrawideband networks," in Proc. IET UWB Symp. joint with Eur. UWB Radio Technol. Workshop. Grenoble, France, May 2007
  27. J. Liu, M. Ghavami, X. Chu, B. Allen, and W. Q. Malik, "Diversity analysis of multi-antenna UWB impulse radio systems with correlated propagation channels," in Proc. IEEE Wireless Commun. Net. Conf. (WCNC). Hong Kong, Mar. 2007
  28. W. Q. Malik, B. Allen, and D. J. Edwards, “A simple adaptive beamformer for ultrawideband wireless systems,” in Proc. IEEE Int. Conf. Ultrawideband (ICUWB). Waltham, MA, USA, Sept. 2006
  29. N. Nyirongo, W. Q. Malik, and D. J. Edwards, “Concatenated RS-convolutional codes for ultrawideband multiband-OFDM,” in Proc. IEEE Int. Conf. Ultrawideband. (ICUWB). Waltham, MA, USA, Sep. 2006
  30. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Frequency-dependent pathloss in ultrawideband indoor channels,” in Proc. IEEE Int. Conf. Commun. (ICC). Istanbul, Turkey, June 2006
  31. Z. Tarique, W. Q. Malik, and D. J. Edwards, “Effect of bandwidth and antenna directivity on the range estimation accuracy in a multipath environment,” in Proc. IEEE Veh. Technol. Conf. (VTC). Melbourne, Australia, May 2006
  32. W. Q. Malik, B. Allen, and D. J. Edwards, “Measurement of ultra wide band wireless channels,” in Proc. ARMMS RF Microwave Conf. Steventon, UK, Apr. 2006 (BEST PAPER AWARD)
  33. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Optimal system design considerations for the ultra-wideband multipath channel,” in Proc. IEEE Veh. Technol. Conf. (VTC). Dallas, TX, USA, Sept. 2005
  34. J. Liu, B. Allen, W. Q. Malik, and D. J. Edwards, “Spatial and polarisation correlation characteristics for UWB impulse radio,” in Proc. IEEE Int. Conf. Ultra-wideband (ICU). Zurich, Switzerland, Sep. 2005
  35. W. Q. Malik, C. J. Stevens, and D. J. Edwards, “Synthetic aperture analysis of multipath propagation in the ultra-wideband communications channel,” in Proc. IEEE Sig. Proc. Adv. Wireless Commun. (SPAWC). New York, USA, June 2005
  36. W. Q. Malik, M. C. Mtumbuka, C. J. Stevens, and D. J. Edwards, “Increasing MIMO capacity in ultra-wideband communications through orthogonal polarizations,” in Proc. IEEE Sig. Proc. Adv. Wireless Commun. (SPAWC). New York, USA, June 2005
  37. W. Q. Malik, M. C. Mtumbuka, D. J. Edwards, and C. J. Stevens, “Performance analysis of ultra-wideband spatial MIMO communications systems,” in Proc. IST Mobile Comm. Summit. Dresden, Germany, June 2005
  38. H. A. Khan, W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Ultra wideband multiple-input multiple-output radar,” in Proc. IEEE Intl. Radar Conf. Arlington, VA, USA, May 2005
  39. W. Q. Malik, H. A. Khan, D. J. Edwards, and C. J. Stevens, “A gridding algorithm for efficient density compensation of arbitrarily sampled Fourier-domain data,” in Proc. IEEE Sarnoff Symp. Princeton, NJ, USA, Apr. 2005
  40. M. C. Mtumbuka, W. Q. Malik, C. J. Stevens, and D. J. Edwards, “A tri-polarized ultra-wideband MIMO system,” in Proc. IEEE Sarnoff Symp. Princeton, NJ, USA, Apr. 2005
  41. J. Liu, B. Allen, W. Q. Malik, and D. J. Edwards, “A measurement based spatial correlation analysis for MB-OFDM ultra wideband transmissions,” in Proc. Loughborough Antennas Propagat. (LAPC). Conf. Loughborough, UK, Apr. 2005
  42. J. Liu, B. Allen, W. Q. Malik, and D. J. Edwards, “On the spatial correlation of MB-OFDM ultra wideband transmissions,” in Proc. COST 273 Meeting. Bologna, Italy, Jan. 2005
  43. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Small-scale delay-domain statistics of the frequency-selective indoor wireless channel,” in Proc. IEEE Int. Multitopic Conf. Lahore, Pakistan, Dec. 2004
  44. W. Q. Malik, C. J. Stevens, and D. J. Edwards, “Spatio-spectral normalisation for ultra wideband antenna dispersion,” in Proc. IEEE High Freq. Postgrad. Student Coll. Manchester, UK, Sep. 2004
  45. H. A. Khan, W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Ultra wideband synthetic aperture image formation techniques,” in Proc. IEE UWB Comm. Tech. Sys. Design. London, UK, July 2004
  46. W. Q. Malik, D. J. Edwards, and C. J. Stevens, “Experimental evaluation of rake receiver performance in a line-of-sight ultra-wideband channel,” in Proc. Joint IEEE Ultra-Wideband Sys. Tech. & Int. Workshop Ultra-Wideband Sys. Kyoto, Japan, May 2004
Book Reviews
  1. W. Q. Malik and B. Allen, "Book Review: MIMO Wireless Communications by C. Oestges and B. Clerckx (Elsevier, 2007)," IET Commun. Engr., June/July 2007
Professional Courses
  1. W. Q. Malik and B. Allen, "Ultrawideband propagation," 12th IET Course on Radiowave Propagat. Cambridge, UK, May 2007
Theses and Technical Reports
  1. W. Q. Malik, "An holistic approach to optimal ultra-wideband wireless communications system design," in Doctoral thesis: University of Oxford, UK, 2005
  2. W. Q. Malik, "Picocellular ultra wideband wireless communications," in Technical Report: Department of Engineering Science, University of Oxford, UK, 2003
  3. W. Q. Malik, "A digital signal processor architecture and development suite for communications applications," in Bachelor's thesis: National University of Sciences and Technology, Pakistan, 2000
White Papers
  1. B. Allen, T. Brown, K. Schwieger, E. Zimmermann, W. Q. Malik, D. Edwards, L. Ouvry, and I. Oppermann, “Ultra wideband: technology and future perspectives,” in Proc. 13th WWRF Meeting. Jeju Island, Korea, Mar. 2005
Presentations and Posters
  1. "Multidimensional communications," University of Cambridge. Cambridge, UK, August 2007
  2. "Indoor radio propagation characterisation and optimised system design," National Physical Laboratories, London, UK, May 2007
  3. "Spatio-temporal radio imaging with ultrawideband microwaves," Oxford University Research Staff Society Poster Session, Oxford, UK, Apr. 2007
  4. "The effect of bandwidth on radio channel characteristics," University of Bath, UK, Oct. 2006
  5. "Physical layer considerations for ultrawideband systems," Heriot-Watt University, Edinburgh, UK, May 2006
  6. "Ultrawideband communications systems," IET EC3 Lecture. London, UK, Apr. 2006
  7. "Ultra-wideband communications: full wave synthetic aperture techniques for performance prediction," Meeting of the Task Group on Mobile and Terrestrial Propagation, UK Office of Communications. London, UK, July 2004
  8. "Ultra-wideband indoor propagation," Centre for Telecommunications Research, King's College London. UK, July 2004
  9. "Ultra-wideband technology: military applications and social implications," 2nd UK National Student Pugwash Conference. Cambridge, UK, Jan. 2003