28 citations · 76 across the 48 of their papers we have counts for
5 papers · 1 filter
Band Allocation for Cognitive Radios with Buffered Primary and Secondary Users
Ahmed El Shafie, Ahmed Sultan, Tamer Khattab
In this paper, we study band allocation of buffered secondary users (SUs) to orthogonal primary licensed bands, where each primary band is assigned…
Protocol Design and Stability Analysis of Cooperative Cognitive Radio Users
Ahmed El Shafie, Tamer Khattab, H. Vincent Poor
A single cognitive radio transmitter--receiver pair shares the spectrum with two primary users communicating with their respective receivers. Each primary user has a local traffic…
Adaptive Modulation in Multi-user Cognitive Radio Networks over Fading Channels
F. Foukalas, T. Khattab, H. V. Poor
In this paper, the performance of adaptive modulation in multi-user cognitive radio networks over fading channels is analyzed. Multi-user diversity is considered for opportunistic…
On the Coexistence of a Primary User with an Energy Harvesting Secondary User: A Case of Cognitive Cooperation
Ahmed El Shafie, Tamer Khattab, Amr El-Keyi +1
In this paper, we consider a cognitive scenario where an energy harvesting secondary user (SU) shares the spectrum with a primary user (PU). The secondary source helps the primary…
Packet Relaying Control in Sensing-based Spectrum Sharing Systems
F. Foukalas, T. Khattab, H. V. Poor
Cognitive relaying has been introduced for opportunistic spectrum access systems by which a secondary node forwards primary packets whenever the primary link faces an outage condit…