18 citations · 89 across the 23 of their papers we have counts for
31 papers
RIS-enabled Multi-user M-QAM Uplink NOMA Systems: Design, Analysis, and Optimization
Mahmoud AlaaEldin, Mohammad Al-Jarrah, Xidong Mu +3
Non-orthogonal multiple access (NOMA) is widely recognized for enhancing the energy and spectral efficiency through effective radio resource sharing. However, uplink NOMA systems f…
Fed-Sophia: A Communication-Efficient Second-Order Federated Learning Algorithm
Ahmed Elbakary, Chaouki Ben Issaid, Mohammad Shehab +3
Federated learning is a machine learning approach where multiple devices collaboratively learn with the help of a parameter server by sharing only their local updates. While gradie…
Generalized BER Performance Analysis for SIC-based Uplink NOMA Systems
Mahmoud AlaaEldin, Emad Alsusa, Mohammad Al-Jarrah +1
Non-orthogonal multiple access (NOMA) is widely recognized for its spectral and energy efficiency, which allows more users to share the network resources more effectively. This pap…
Robust Joint Active-Passive Beamforming Design for IRS-Assisted ISAC Systems
Mahmoud AlaaEldin, Emad Alsusa, Karim G. Seddik +2
The idea of Integrated Sensing and Communication (ISAC) offers a promising solution to the problem of spectrum congestion in future wireless networks. This paper studies the integr…
Timely Multi-Process Estimation Over Erasure Channels With and Without Feedback: Signal-Independent Policies
Karim Banawan, Ahmed Arafa, Karim G. Seddik
We consider a multi-process remote estimation system observing independent Ornstein-Uhlenbeck processes. In this system, a shared sensor samples the processes in such a way…
Timely Multi-Process Estimation with Erasures
Karim Banawan, Ahmed Arafa, Karim G. Seddik
We consider a multi-process remote estimation system observing independent Ornstein-Uhlenbeck processes. In this system, a shared sensor samples the processes in such a way…
Optimization of Energy-Constrained IRS-NOMA Using a Complex Circle Manifold Approach
Mahmoud AlaaEldin, Emad Alsusa, Karim G. Seddik +2
This work investigates the performance of intelligent reflective surfaces (IRSs) assisted uplink non-orthogonal multiple access (NOMA) in energy-constrained networks. Specifically,…
On Spatial Multiplexing Using Reconfigurable Intelligent Surfaces
Mohamed A. ElMossallamy, Hongliang Zhang, Radwa Sultan +4
We consider an uplink multi-user scenario and investigate the use of reconfigurable intelligent surfaces (RIS) to optimize spatial multiplexing performance when a linear receiver i…
Sample, Quantize and Encode: Timely Estimation Over Noisy Channels
Ahmed Arafa, Karim Banawan, Karim G. Seddik +1
The effects of quantization and coding on the estimation quality of Gauss-Markov processes are considered, with a special attention to the Ornstein-Uhlenbeck process. Samples are a…
Reconfigurable Intelligent Surfaces for Wireless Communications: Principles, Challenges, and Opportunities
Mohamed A. ElMossallamy, Hongliang Zhang, Lingyang Song +3
Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments. In a smart radio envir…
Timely Estimation Using Coded Quantized Samples
Ahmed Arafa, Karim Banawan, Karim G. Seddik +1
The effects of quantization and coding on the estimation quality of a Gauss-Markov, namely Ornstein-Uhlenbeck, process are considered. Samples are acquired from the process, quanti…
On Timely Channel Coding with Hybrid ARQ
Ahmed Arafa, Karim Banawan, Karim G. Seddik +1
A status updating communication system is examined, in which a transmitter communicates with a receiver over a noisy channel. The goal is to realize timely delivery of fresh data o…
Towards Optimal Resource Allocation in Wireless Powered Communication Networks with Non-Orthogonal Multiple Access
Mariam M. N. Aboelwafa, Mohamed A. Abd-Elmagid, Alessandro Biason +3
The optimal allocation of time and energy resources is characterized in a Wireless Powered Communication Network (WPCN) with non-Orthogonal Multiple Access (NOMA). We consider two…
Stable Throughput of Cooperative Cognitive Networks with Energy Harvesting: Finite Relay Buffer and Finite Battery Capacity
Mohamed A. Abd-Elmagid, Tamer ElBatt, Karim G. Seddik +1
This paper studies a generic model for cooperative cognitive radio networks where the secondary user is equipped with a finite relay queue as well as a finite battery queue. Our pr…
Non-Orthogonal Multiple Access Schemes in Wireless Powered Communication Networks
Mohamed A. Abd-Elmagid, Alessandro Biason, Tamer ElBatt +2
We characterize time and power allocations to optimize the sum-throughput of a Wireless Powered Communication Network (WPCN) with Non-Orthogonal Multiple Access (NOMA). In our setu…
Asymmetric Degrees of Freedom of the Full-Duplex MIMO 3-Way Channel with Unicast and Broadcast Messages
Adel M. Elmahdy, Amr El-Keyi, Yahya Mohasseb +4
In this paper, we characterize the asymmetric total degrees of freedom (DoF) of a multiple-input multiple-output (MIMO) 3-way channel. Each node has a separate-antenna full-duplex…
Sparse Spectrum Sensing in Infrastructure-less Cognitive Radio Networks via Binary Consensus Algorithms
Mohamed Seif, Tamer Elbatt, Karim G. Seddik
Compressive Sensing has been utilized in Cognitive Radio Networks (CRNs) to exploit the sparse nature of the occupation of the primary users. Also, distributed spectrum sensing has…
On Optimizing Cooperative Cognitive User Performance under Primary QoS Constraints
Adel M. Elmahdy, Amr El-Keyi, Tamer ElBatt +1
We study the problem of optimizing the performance of cognitive radio users with opportunistic real-time applications subject to primary users quality-of-service (QoS) constraints.…
On Optimal Policies in Full-Duplex Wireless Powered Communication Networks
Mohamed A. Abd-Elmagid, Alessandro Biason, Tamer ElBatt +2
The optimal resource allocation scheme in a full-duplex Wireless Powered Communication Network (WPCN) composed of one Access Point (AP) and two wireless devices is analyzed and der…
Optimization of Energy-Constrained Wireless Powered Communication Networks with Heterogeneous Nodes
Mohamed A. Abd-Elmagid, Tamer ElBatt, Karim G. Seddik
In this paper, we study wireless networks where nodes have two energy sources, namely a battery and radio frequency (RF) energy harvesting circuitry. We formulate two optimization…
On the Stable Throughput of Cooperative Cognitive Radio Networks with Finite Relaying Buffer
Adel M. Elmahdy, Amr El-Keyi, Tamer ElBatt +1
In this paper, we study the problem of cooperative communications in cognitive radio systems where the secondary user has limited relaying room for the overheard primary packets. M…
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)…
On the Stability of Random Multiple Access with Feedback Exploitation and Queue Priority
Karim G. Seddik
In this paper, we study the stability of two interacting queues under random multiple access in which the queues leverage the feedback information. We derive the stability region u…
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…