• 3D Beamforming with Massive Cylindrical Arrays for Physical Layer Secure Data Transmission 

      Yaacoub E.; Al-Husseini M.; Chehab A.; Abualsaud K.; Khattab T.; ... more authors ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)
      In this letter, a novel approach for physical layer security is implemented using massive cylindrical antenna arrays. A part of the arrays is used for transmitting a signal reliably from source to destination using highly ...
    • Blind SNR Estimation of Gaussian-Distributed Signals in Nakagami Fading Channels 

      Hafez, Mohammed; Khattab, Tamer; Shalaby, Hossam M. H. ( IEEE , 2015 , Article)
      A blind (non-data-aided) SNR estimator using the statistical moments of the received signal is proposed. The proposed envelope-based non-data-aided estimator works for any time-domain Gaussian-distributed signal (e.g. OFDM ...
    • Comparison of relaying strategies for cooperative diversity systems with adaptive modulation 

      Choi, Seyeong; Alouini, M.-S.; Yang, Hong-Chuan; Hasna, M.O. ( IEEE , 2009 , Conference Paper)
      In this paper, we propose several relay selection schemes for cooperative diversity systems with adaptive transmission. The proposed schemes are based on dual-hop relaying with multiple relays. We analyze the performance ...
    • DFT-Based Multi-Directions Directional Modulation 

      Hafez, Mohammed; Khattab, Tamer; Arslan, Hüseyin ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)
      In this letter, a physically secure multi-directions directional modulation scheme is proposed. The scheme provides an adaptive beam-width assignment, where each user is granted a different beam width based on its channel ...
    • Finite-sample size multiple antennas spectrum sensing 

      Sedighi, Saeid; Taherpour, Abbas; Khattab, Tamer (2012 , Conference Paper)
      In this paper, we consider the problem of multiple antenna spectrum sensing in Cognitive Radios (CR) by exploiting the prior information about unknown parameters. Specifically, we consider a blind spectrum sensing problem ...