Ahmed Arafa, Ph.D.

Education:

• Ph.D., University of Maryland, College Park, MD, 2017
• M.Sc., Nile University, Egypt, 2012
• B.Sc., Alexandria University, Egypt 2010

Research:

General area:

• Communication and Information Theory
• Signal Processing
• Machine Learning

Recent focus:

• Federated and Distributed Learning
• Semantic Communications
• Information-Theoretic Privacy and Security

Selected Publications:

1. A. Ali and A. Arafa, “Delay Sensitive Hierarchical Federated Learning with Stochastic Local Updates,” IEEE Transactions on Cognitive Communications and Networking, to appear.
2. I. Hasan and A. Arafa, “RC-Gossip: Information Freshness in Clustered Networks with Rate-Changing Gossip,” in Proceedings of the Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, California, October 2025.
3. A. Arafa, K. Banawan, K. G. Seddik, and H. V. Poor, “Sample, Quantize and Encode: Timely Estimation Over Noisy Channels,” IEEE Transactions on Communications, Vol. 69, No. 10, pp. 6485–6499, October 2021
4. H. H. Yang, A. Arafa, T. Q. S. Quek, and H. V. Poor, “Age-Based Scheduling Policy for Federated Learning in Mobile Edge Networks,” in Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Barcelona, Spain, May 2020.
5. A. Arafa, J. Yang, S. Ulukus, and H. V. Poor, “Age-Minimal Transmission for Energy Harvesting Sensors with Finite Batteries: Online Policies,” IEEE Transactions on Information Theory, Vol. 66, No. 1, pp. 534—556, January 2020.

Personal Website:

Website