Source codes of publications can be requested at ammar.ahmed@temple.edu 

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Thesis

• A. Ahmed, "Higher Order Statistics based Direction-of-Arrival Estimation," MS Thesis, Pakistan Institute of Engineering and Applied Sciences (PIEAS), October 2011.  (Advisor: Dr. Muhammad Tufail, Co-Advisor: Dr. Shakeel Ahmed)

• A. Ahmed, "Strategies for Radar-Communication Spectrum Sharing," Ph.D. Thesis, Temple University, May 2021. (Primary Advisor: Dr. Yimin D. Zhang, Doctoral Advisory Committee: Dr. Dennis Silage, Dr. Joseph Picone, Dr. Yu Wang)

Conference Publications

• A. Ahmed, Y. D. Zhang, and B. Himed, "Sparsity-based high-resolution analysis of mixed-mode over-the-horizon radar signals,"  International Conference on Radar Systems, Edinburgh, UK, Oct. 2022.

• A. Ahmed, Y. D. Zhang, and B. Himed, "Doppler signature analysis of over-the-horizon radar signals with target altitude perturbation," IEEE Radar Conference, New York, NY, March 2022.

• A. Ahmed and Y. D. Zhang, “Non-redundant sparse array with flexible aperture,” Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2020.

• A. Ahmed, Y. D. Zhang, and B. Himed, “Doppler signature separation of mixed O/X-mode over-the-horizon radar signals,” IEEE Radar Conference, Florence, Italy, Sept. 2020.

• A. Ahmed, D. Silage, and Y. D. Zhang, “High-resolution target sensing using multi-frequency sparse array,” IEEE Sensor Array and Multichannel Signal Processing Workshop, Hangzhou, China, June 2020. 

• S. Zhang, A. Ahmed, Y. D. Zhang, and S. Sun, “DOA estimation exploiting interpolated multi-frequency sparse array,” IEEE Sensor Array and Multichannel Signal Processing Workshop, Hangzhou, China, June 2020. 

• A. Ahmed, D. Silage, and Y. D. Zhang, “Chance constrained  beamforming for joint radar-communication systems,” IEEE Sensor Array and Multichannel Signal Processing Workshop, Hangzhou, China, June 2020. 

• A. Ahmed, S. Zhang, and Y. D. Zhang, “Optimized sensor selection for joint radar-communication systems,” IEEE International Conference on Acoustics, Speech, and Signal Processing, Barcelona, Spain, May 2020. 

• A. Ahmed, Y. D. Zhang, and B. Himed, “Doppler signature analysis of mixed O/X-mode signals in over-the-horizon radar,” IEEE International Radar Conference, Rockville, MD, April-May 2020. 

• S. Zhang, A. Ahmed, and Y. D. Zhang, “Sparsity-based time-frequency analysis for automatic radar waveform recognition,” IEEE International Radar Conference, Rockville, MD, April-May 2020. 

• A. Ahmed, Y. D. Zhang, A. Hassanien, B. Himed, “OFDM-based joint radar-communication system: optimal sub-carrier allocation and power distribution by exploiting mutual information,” Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2019.

• S. Zhang, A. Ahmed, Y. D. Zhang, “Robust source localization exploiting collaborative UAV network,” Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Nov. 2019.

• A. Ahmed, S. Zhang, and Y. D. Zhang, “Multi-target motion parameter estimation exploiting collaborative UAV network,” IEEE International Conference on Acoustics, Speech, and Signal Processing, Brighton, U.K., May 2019.

• A. Ahmed, Y. D. Zhang, and J-K. Zhang, “Coprime array design with minimum lag redundancy,” IEEE International Conference on Acoustics, Speech, and Signal Processing, Brighton, U.K., May 2019. [MATLAB]

• A. Ahmed, Y. D. Zhang, and B. Himed, “Distributed dual-function radar-communication MIMO system with optimized resource allocation,” IEEE Radar Conference, Boston, MA, April 2019.

• S. Zhang, A. Ahmed, and Y. D. Zhang "Sparsity-based collaborative sensing in a scalable wireless network", SPIE Defense + Commercial Sensing, Baltimore, MD, April 2019.

• A. Ahmed, Y. Gu, D. Silage, and Y. D. Zhang, “Power-efficient multi-user dual-function radar-communications,” IEEE International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, June 2018.

• A. Ahmed, Y. D. Zhang, and B. Himed, “Multi-user dual-function radar-communications exploiting sidelobe control and waveform diversity,” IEEE Radar Conference, Oklahoma City, OK, April 2018. 

• A. Ahmed, Y. D. Zhang, and B. Himed, “Cumulant-based direction-of-arrival estimation using multiple co-prime frequencies,” Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, Oct. 2017.

• A. Ahmed, Y. D. Zhang, and B. Himed, “Effective nested array design for fourth-order cumulant-based DOA estimation,” IEEE Radar Conference, Seattle, WA, May 2017. (best student paper award - 3rd position)

• A. Ahmed, M. K. Zia, and M. Tufail, “Widely linear matrix pencil based frequency estimation in power systems,” International Conference on Emerging Technologies, Islamabad, Dec. 2013.

• A. Ahmed, M. F. Khan, and M. Tufail, “Multiple invariance cumulant ESPRIT for DOA estimation,” International Conference on Robotics and Emerging Allied Technologies in Engineering, Islamabad, April 2014, pp. 157-159.

• A. Ahmed, M. K. Zia, and M. Tufail, “Subspace based widely linear frequency estimation in sustainable energy systems,” International Conference on Robotics and Emerging Allied Technologies in Engineering, Islamabad, April 2014, pp. 287-291.

• A. Ahmed, S. A. Hamza, and M. Tufail, “Comparative analysis of fourth order cumulant based ESPRIT algorithms,” International Conference on Frontiers of Information Technology, Islamabad, Dec. 2014, pp. 133-138.

• M. K. Zia, A. Ahmed, and M. Tufail, “A duct based experimental setup for active noise control,” International Conference on Frontiers of Information Technology, Islamabad, Dec. 2014, pp. 139-143.

Patents/IDFs

• A. Ahmed, Y. D. Zhang, and B. Himed, “System and method for distributed dual-function radar-communication,” U.S. Patent 11598841B1, March 7, 2023.