Education Profile

  • Ph.D. in Digital Signal Processing, King's College London and Cardiff University, London, UK (October 2002 - October 2005)
  • M.S. in Communication Engineering , University of Manchester, Manchester, UK (October 2001 - October 2002)
  • B.S. in Electronics, Sir Syed University of Engineering and Technology, Karachi, Pakistan (March 1994 - March 1998)

Current position

He is currently working as a Research Scientist with the Communication Theory Laboratory (CTL). Before this, he was a faculty member at the Information Technology University Lahore from where he is on leave now.

Why did you choose KAUST?

I was very much inspired by the worthy endeavor of making KAUST a new “House of Wisdom” in the region, and I wanted to be a part of it. KAUST is a model institution for the advancement of scientific research.

How is KAUST helping you fulfill your dream?

KAUST is providing me with full independence to do my research. My children are also getting the best education here at The KAUST Schools. KAUST is a truly multi-cultural community and institution, and I am proud of to be a part of the community.

What is your research topic?

My research topics include waveform design for MIMO-radar and localization of target using passive radar.

What is are your research accomplishments before and after joining KAUST?

The focus of my research is the areas of array signal processing with applications to communications and radar. Before joining KAUST, I worked in the top universities of the world, and have published a number of high-quality journal papers. I am a recipient of a contribution award for my excellent research from the University of Edinburgh (UK). 

In KAUST, my group has published a number of high-quality journal papers. We have also organized a number of workshops in Saudi Arabia to teach how to design radar in practice. I also have become the senior member of IEEE in KAUST.

What do you think about the KAUST environment and social life?

KAUST is truly a multi-cultural institution. At KAUST, people come from all over Saudi Arabia, Europe, the United States, Asia, Australia, and Africa. They come here with different ways of thinking, different cultures, and different approaches for solving problems. To socialize and work with them is both exciting and challenging

 

Selected Publications

Ph.D. Thesis:
  • S. Ahmed, "Iterative and Recursive Methods of Equalization for Doubly Selective Channels," King's College London, London, UK, Oct. 2005. 
M.S. Thesis:
  • S. Ahmed, "Impact of Bandlimiting on MSK Digital Signals," University of Manchester, Institute of Science and Technology, Manchester, UK, Oct. 2002.
Journal Publications:
  • S. Ahmed, J. S. Thompson, and B. Mulgrew, “Finite alphabet constant-envelope  waveform design for MIMO radar beampattern,” IEEE Transactions on Signal Processing, vol. 59, no. 11, pp. 5326 - 5337, Nov. 2011.
  • S. Ahmed, J. S. Thompson, and B. Mulgrew, “Unconstrained synthesis of covariance matrix for MIMO radar transmit beam-pattern,” IEEE Transactions on Signal Processing, vol. 59, no. 8, pp. 3837 - 3849, Aug. 2011.
  • S. Ahmed and L. Zhang, “Low complexity iterative detection for OFDMA uplink with frequency offsets,” IEEE Transactions on Wireless Communications, vol. 8, no. 3, pp. 1199-1205, Mar. 2009.
  • S. Ahmed, T. Ratnarajah, and C. Cowan, “Iterative receivers for MIMO-OFDM and their convergence behavior,” IEEE Transactions on Vehicular Technology, vol. 58, pp. 461-468, Jan. 2009.
  • S. Ahmed, Z. Ding, and T. Ratnarajah, “Cooperative transmission protocol with full diversity and iterative detection,” IET Journal on Signal Processing, vol. 2, pp. 361-368, Dec. 2008.
  • S. Ahmed, T. Ratnarajah, and C. Cowan, “Reduced-complexity iterative equalization for severe time-dispersive MIMO channels,” IEEE Transactions on Vehicular Technology, vol. 57, pp. 594 - 600, Jan. 2008.
  • S. Ahmed, M. Sellathurai, S. Lambotharan, and J. A. Chambers, “Low complexity iterative method of equalization for single carrier with cyclic prefix in doubly selective channel,” IEEE Signal Processing Letters, vol. 1, pp. 5-8, Jan. 2006.
  • S. Ahmed, S. Lambotharan, A. Jakobsson, and J. A. Chambers, “MIMO frequency selective channels with multiple frequency offsets: Estimation and detection techniques,” IEE Proceedings Communications, vol. 53, pp. 489- 494, Aug. 2005.
  • S. Ahmed, S. Lambotharan, A. Jakobsson, and J. A. Chambers, “Parameter estimation and equalization techniques for communication channels with multipath and multiple frequency offsets,” IEEE Transactions on Communications, vol. 53, pp. 219-223, Feb. 2005.
Conference Publications:
  • S. Ahmed and M. -S. Alouini, “Low complexity receiver design for MIMO-radar,” in Proc. of IEEE Workshop on Radar and Sonar Networks in conjunction with IEEE Global Communications Conference (GLOBECOM 2012), Anaheim, CA, USA, Dec. 2012.
  • S. Jardak, S. Ahmed, and M. -S. Alouini, “Generating correlated QPSK waveforms by exploiting Gaussian random variables,” in Proc. of IEEE Asilomar Conference on Signals, Systems and Computers (ASILOMAR 2012), Pacific Grove, CA, USA, Nov. 2012.
  • S. Ahmed, J. S. Thompson, and B. Mulgrew, “MIMO-radar waveform design for beampattern using particle-swarm-optimisation,” in Proc. of International Communication Conference (ICC 2012), Ottawa, ON, Canada, Jun. 2012.
  • S. Ahmed, J. S. Thompson, Y. Petillot, and B. Mulgrew, “Fast computations of constant envelope waveforms for MIMO- radar transmit beampattern,” in Proc. of IEEE International Radar Conference, Washington D.C., USA, May 2010.
  • S. Ahmed, J. S. Thompson, Y. Petillot, and B. Mulgrew, “Constant envelope waveform design for MIMO-radar,” in Proc. of IEEE International Conference on Acoustics, Speech, and Signal Processing ( ICASSP 2010), Dallas, TX, USA, Mar. 2010.
  • S. Ahmed and L. Zhang, “MIMO-OFDMA uplink detection with distinct frequency offsets from each user,” in Proc. of IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2009), Tokyo, Japan, Sep. 2009.
  • S. Ahmed and L. Zhang, “Iterative detection for the uplink of an OFDMA system with frequency offsets,” in Proc. of IEEE Wireless Communications and Networking Conference (WCNC 2009), Budapest, Hungary, Apr. 2009.
  • S. Ahmed, M. Sellathurai, and T. Ratnarajah, “Performance of iterative MAP receiver for MIMO-OFDM channels with anti-gray mapping,” in Proc. of IEEE Vehicular Technology Conference (VTC-Spring 2008), Marina Bay, Singapore, May 2008.
  • M. Amin, S. Ahmed, and V. Fusco, “The effect of spatial axial ratio variation on QPSK modulation encoded using orthogonal circularly polarized signals,” in Proc. of IEEE European Microwave Conference (EuMC 2007), Munich, Germany, Oct. 2007.
  • S. Ahmed, M. Amin, V. Fusco, and C. Cowan, “Direct BPSK demodulation by polarization rotation in the presence of channel noise,” in Proc. of IEEE Loughborough Antennas and Propagation Conference (LAPC 2007), Loughborough, UK, Apr. 2007.
  • S. Ahmed, T. Ratnarajah, and C. Cowan, “Convergence behavior of an iterative MIMO-OFDM receiver,” in Proc. of IEEE Vehicular Technology Conference (VTC-Spring 2007), Dublin, Republic of Ireland, Apr. 2007.
  • S. Ahmed, T. Ratnarajah, and C. Cowan, “Low complexity iterative equalization for severe time dispersive MIMO channels,” in Proc. of IEEE Asilomar Conference on Signals, Systems and Computers (ASILOMAR 2006), Pacific Grove, CA, USA, Oct.-Nov. 2006.
  • S. Ahmed, Z. Ding, T. Ratnarajah, and C. Cowan, “Cooperative transmission protocol with full diversity and low complexity iterative detection,” in Proc. of IEEE Asilomar Conference on Signals, Systems and Computers (ASILOMAR 2006), Pacific Grove, CA, USA, Oct.-Nov. 2006.
  • S. Ahmed, T. Ratnarajah, M. Sellathurai, and C. Cowan, “Iterative equalization for severe time dispersive MIMO channels,” in Proc. of European Signal Processing Conference (EUSIPCO 2006), Florence, Italy, Sep. 2006.
  • S. Ahmed, M, Sellathurai, and J. A. Chambers, “Low complexity iterative method of equalization for OFDM in time varying Channels,” in Proc. of IEEE Asilomar Conference on Signals, Systems and Computers (ASILOMAR 2005), Pacific Grove, CA, USA, Oct.-Nov. 2005.
  • S. Ahmed, M, Sellathurai, S. Lambotharan, and J. A. Chambers, “Low complexity iterative methods of Equalization for OFDM,” in Proc. of European Signal Processing Conference (EUSIPCO 2005), Antalya, Turkey, Sep. 2005.
  • S. Ahmed, S. Lambotharan, A. Jakobsson, and J. A. Chambers, “Parameter estimation and equalization techniques for MIMO frequency selective channels with multiple frequency offsets,” in Proc. of European Signal Processing Conference (EUSIPCO 2004), Vienna, Austria, Sep. 2004.