50 citations · 149 across the 38 of their papers we have counts for
4 papers · 1 filter
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…
Maximum Secondary Stable Throughput of a Cooperative Secondary Transmitter-Receiver Pair: Protocol Design and Stability Analysis
Ahmed El Shafie, Tamer Khattab, Amr El-Keyi +1
In this paper, we investigate the impact of cooperation between a secondary transmitter-receiver pair and a primary transmitter (PT) on the maximum stable throughput of the primary…
On the Diversity Gain Region of the Z-interference Channels
Mohamed S. Nafea, Karim G. Seddik, Mohammed Nafie +1
In this work, we analyze the diversity gain region (DGR) of the single-antenna Rayleigh fading Z-Interference channel (ZIC). More specifically, we characterize the achievable DGR o…
A Diversity-Multiplexing-Delay Tradeoff of ARQ Protocols in The Z-interference Channel
Mohamed S. Nafea, D. Hamza, Karim G. Seddik +2
In this work, we analyze the fundamental performance tradeoff of the single-antenna Automatic Retransmission reQuest (ARQ) Z-interference channel (ZIC). Specifically, we characteri…