Yazar "Hafez, Mohammed" için Makale Koleksiyonu listeleme
-
DFT-based multi-directions directional modulation
Hafez, Mohammed; Khattab, Tamer; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers, 2019)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 ... -
Reducing precoder/channel mismatch and enhancing secrecy in practical MIMO systems using artificial signals
Peköz, Berker; Hafez, Mohammed; Köse, Selçuk; Arslan, Hüseyin (IEEE - Institute of Electrical and Electronics Engineers, Inc, 2020)Practical multiple-input-multiple-output (MIMO) systems depend on a predefined set of precoders to provide spatial multiplexing gain. This limitation on the flexibility of the precoders affects the overall performance. ... -
Secure spatial multiple access using directional modulation
Hafez, Mohammed; Yusuf, Marwan; Khattab, Tamer; Elfouly, Tarek; Arslan, Hüseyin (IEEE-Institute of Electrical and Electronics Engineers Inc, 2018)In this paper, we introduce a secure multiple access scheme, which exploits the multipath structure of the channel to create a multi-user interference environment. The generated interference enables legitimate users to ... -
Thresholds optimization for one-bit feedback multi-user scheduling
Hafez, Mohammed; El Shafie, Ahmed; Shaqfeh, Mohammed; Khattab, Tamer; Alnuweiri, Hussein; Arslan, Hüseyin (Institute of Electrical and Electronics Engineers Inc., 2018)We propose a new one-bit feedback scheme with scheduling decision based on the maximum expected weighted rate. We show the concavity of the 2-user case and provide the optimal solution which achieves the maximum weighted ...