50 citations · 149 across the 38 of their papers we have counts for
4 papers · 1 filter
SWIPT using Hybrid ARQ over Time Varying Channels
Mehdi Salehi Heydar Abad, Ozgur Ercetin, Mohamed Nafie +1
We consider a class of wireless powered devices employing Hybrid Automatic Repeat reQuest (HARQ) to ensure reliable end-to-end communications over a two-state time-varying channel.…
A Probabilistic MAC for Cognitive Radio Systems with Energy Harvesting Nodes
Ramy E. Ali, Fadel F. Digham, Karim G. Seddik +3
In this paper, we consider a cognitive radio (CR) system where the secondary user (SU) harvests energy from both the nature resources and the primary user (PU) radio frequency(RF)…
A Pricing-Based Cooperative Spectrum Sharing Stackelberg Game
Ramy E. Ali, Karim G. Seddik, Mohammed Nafie +1
We consider the problem of cooperative spectrum sharing among a primary user (PU) and multiple secondary users (SUs) under quality of service (QoS) constraints. The SUs network is…
Cognitive Radio Transmission Strategies for Primary Markovian Channels
Ahmed ElSamadouny, Mohammed Nafie, Ahmed Sultan
A fundamental problem in cognitive radio systems is that the cognitive radio is ignorant of the primary channel state and, hence, of the amount of actual harm it inflicts on the pr…