50 citations · 132 across the 22 of their papers we have counts for
25 papers
A New Relation Between Energy Efficiency and Spectral Efficiency in Wireless Communications Systems
Lokman Sboui, Zouheir Rezki, Ahmed Sultan +1
When designing wireless communication systems (WCS), spectral efficiency (SE) has been the main design performance metric. Recently, energy efficiency (EE) is attracting a huge int…
Secret-Key-Aided Scheme for Securing Untrusted DF Relaying Networks
Ahmed El Shafie, Ahmed Sultan, Asma Mabrouk +2
This paper proposes a new scheme to secure the transmissions in an untrusted decode-and-forward (DF) relaying network. A legitimate source node, Alice, sends her data to a legitima…
Achievable Rates of Buffer-Aided Full-Duplex Gaussian Relay Channels
Ahmed El Shafie, Ahmed Sultan, Ioannis Krikidis +2
We derive closed-form expressions for the achievable rates of a buffer-aided full-duplex (FD) multiple-input multiple-output (MIMO) Gaussian relay channel. The FD relay still suffe…
Physical-Layer Security of a Buffer-Aided Full-Duplex Relaying~System
Ahmed El Shafie, Ahmed Sultan, Naofal Al-Dhahir
This letter proposes a novel hybrid half-/full-duplex relaying scheme to enhance the relay channel security. A source node (Alice) communicates with her destination node (Bob) in t…
Maximum Throughput of a Secondary User Cooperating with an Energy-Aware Primary User
Ahmed El Shafie, Ahmed Sultan, Tamer Khattab
This paper proposes a cooperation protocol between a secondary user (SU) and a primary user (PU) which dedicates a free frequency subband for the SU if cooperation results in energ…
Probabilistic Band-Splitting for a Buffered Cooperative Cognitive Terminal
Ahmed El Shafie, Ahmed Sultan, Tamer Khattab
In this paper, we propose a cognitive protocol that involves cooperation between the primary and secondary users. In addition to its own queue, the secondary user (SU) has a queue…