Now showing items 901-920 of 2623

    • Efficient collaborative spectrum sensing under the smart primary user emulation attacker network 

      Pourgharehkhan, Zahra; Taherpour, Abbas; Khattab, Tamer; Hamila, Ridha ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)
      In this paper, collaborative spectrum sensing to detect random signals corrupted by Gaussian noise in the presence of Primary User Emulation Attackers (PUEAs) is studied. We consider smart PUEAs which aims at increasing ...
    • Distributed spectrum sensing of correlated observations in cognitive radio networks 

      Sedighi, Saeid; Pourgharehkhan, Zahra; Taherpour, Abbas; Khattab, Tamer (2013 , Conference Paper)
      In this paper, Collaborative Spectrum Sensing (CSS) as one of the most efficient sensing approaches in Cognitive Radio Networks (CRNs) is investigated when the Secondary Users (SUs) observations are assumed to be correlated. ...
    • Directional Modulation for Secure RFID in Health Systems 

      Desouky, Gehad; Shehata, Heba; Khattab, Tamer; Abualsaud, Khalid; Guizani, Mohsen ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)
      Radio frequency identification (RFID) systems are gaining more attention in new frontiers of applications due to their simplicity, low size factor and low cost of deployment. One of the emerging frontiers of applications ...
    • Energy-aware joint power, packet and topology optimization by simulated annealing for WSNs 

      Xenakis, A.; Foukalas, F.; Stamoulis, G.; Khattab, T. (2013 , Conference Paper)
      Energy-aware connectivity in wireless sensor networks (WSNs) can increase their network lifetime. This can be achieved by optimizing the power control, a particular communication mechanism and the topology control. To this ...
    • Efficient FPGA-based implementation of a novel dual mode spectrum sensing technique 

      Badawy, Ahmed; Khattab, Tamer (2013 , Conference Paper)
      Cognitive radio networks require an efficient and reliable method of sensing the spectrum. In this paper, we introduce and implement a new dual mode spectrum sensing technique that is based on combining Quickest Detection ...
    • Exploiting spectrum sensing data for key management 

      Badawy, Ahmed; Elfouly, Tarek; Chiasserini, Carla-Fabiana; Khattab, Tamer; Trinchero, Daniele ( Elsevier B.V. , 2017 , Article)
      In cognitive radio networks, secondary users (SUs) communicate on unused spectrum slots in the frequency bands assigned to primary users (PUs). Like any other wireless communication system, cognitive radio networks are ...
    • Energy-efficient cooperative relaying protocol for full-duplex cognitive radio users and delay-aware primary users 

      El Shafie, Ahmed; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Conference Paper)
      This paper considers a network in which a primary user (PU) may cooperate with a cognitive radio (CR) user for transmission of its data packets. The PU is assumed to be a buffered terminal operating in a time-slotted ...
    • Energy-Efficient Proactive Scheduling Policies for Finite-Buffer Regular Service Guarantees 

      Abdellatif, Basem; Galal Khafagy, Mohammad; Chen, Nan; ElFouly, Tarek; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2022 , Conference Paper)
      In this work, we study the energy saving merits of proactive scheduling for downlink multimedia streaming towards a finite-buffer receiver under Rayleigh fading. Three different threshold-based proactive scheduling policies ...
    • Expatriates' Housing Dispersal Outlook in a Rapidly Developing Metropolis Based on Urban Growth Predicted Using a Machine Learning Algorithm 

      Ibrahim, Hatem; Khattab, Ziad; Khattab, Tamer; Abraham, Revina ( Routledge , 2021 , Article)
      Housing dispersal in emerging cities should be investigated as it occurs to achieve a better understanding of future housing dispersal. In this study, housing preferences are analyzed in Doha Metropolitan Area based on ...
    • Fractional low order cyclostationary-based spectrum sensing in cognitive radio networks 

      Hashemi, Hadi; Fard, Sina Mohammadi; Taherpour, Abbas; Khattab, Tamer ( Springer Verlag , 2015 , Conference Paper)
      In this paper, we study the problem of cyclostationary spectrum sensing in cognitive radio networks based on cyclic properties of linear modulations. For this purpose, we use fractional order of observations in cyclic ...
    • Finite-sample size multiple antennas spectrum sensing 

      Sedighi, Saeid; Taherpour, Abbas; Khattab, Tamer (2012 , Conference Paper)
      In this paper, we consider the problem of multiple antenna spectrum sensing in Cognitive Radios (CR) by exploiting the prior information about unknown parameters. Specifically, we consider a blind spectrum sensing problem ...
    • Centralized, Distributed, and Module-Integrated Electric Power System Schemes in CubeSats: Performance Assessment 

      Hussein, Bayan; Massoud, Ahmed M.; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)
      Pico-satellites, also called CubeSats, have gained significant attention in recent years because they offer a low-cost and low-power solution with low latency communication and high data rates compared to larger satellites. ...
    • DFT-Based Multi-Directions Directional Modulation 

      Hafez, Mohammed; Khattab, Tamer; Arslan, Hüseyin ( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)
      In this letter, a physically secure multi-directions directional modulation scheme is proposed. The scheme provides an adaptive beam-width assignment, where each user is granted a different beam width based on its channel ...
    • Detection of temporally correlated primary user signal with multiple antennas 

      Hashemi, Hadi; Fard, Sina Mohammadi; Taherpour, Abbas; Sedighi, Saeid; Khattab, Tamer ( Springer Verlag , 2015 , Conference Paper)
      In this paper, we address the problem of multiple antenna spectrum sensing in cognitive radios (CRs) when the samples of the primary user (PU) signal as well as samples of noise are assumed to be temporally correlated. We ...
    • Deep visual social distancing monitoring to combat COVID-19: A comprehensive survey 

      Himeur, Yassine; Al-Maadeed, Somaya; Almaadeed, Noor; Abualsaud, Khalid; Mohamed, Amr; ... more authors ( Elsevier Ltd , 2022 , Article Review)
      Since the start of the COVID-19 pandemic, social distancing (SD) has played an essential role in controlling and slowing down the spread of the virus in smart cities. To ensure the respect of SD in public areas, visual SD ...
    • Coded Caching for Time-Varying Files Popularities and Asynchronous Delivery 

      Amir, Mohamed; Bedeer, Ebrahim; Ahmed, Mohamed Hossam; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2021 , Article)
      Data communication has seen exponential growth recently, and it currently dominates wireless communication. As a result, proactive caching was developed to minimize peak traffic rates by storing content, in advance, at ...
    • Correlated Multiple Antennas Spectrum Sensing under Calibration Uncertainty 

      Pourgharehkhan, Zahra; Taherpour, Abbas; Sala-Alvarez, Josep; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2015 , Article)
      We address the problem of spectrum sensing in cognitive radios (CRs) when the secondary user (SU) is equipped with a multiantenna receiver. We consider scenarios with correlation between the received channels at different ...
    • Combating jamming attacks in multi-channel IoT networks using game theory 

      Guizani M.; Gouissem A.; Abualsaud K.; Yaacoub E.; Khattab T. ( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)
      Jamming attacks are among the most widely used techniques to block and disturb legitimate communications. Several techniques are used in the literature to combat these attacks. However, most of them either require the ...
    • Detecting Attackers during Quantum Key Distribution in IoT Networks using Neural Networks 

      Al-Mohammed, Hasan Abbas; Al-Ali, Afnan; Yaacoub, Elias; Abualsaud, Khalid; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference Paper)
      Internet of Things (IoT) deployments face significant security challenges due to the limited energy and computational power of IoT devices. These challenges are more serious in the quantum communications era, where certain ...
    • Deep Reinforcement Learning Powered IRS-Assisted Downlink NOMA 

      Shehab, Muhammad; Ciftler, Bekir S.; Khattab, Tamer; Abdallah, Mohamed M.; Trinchero, Daniele ( Institute of Electrical and Electronics Engineers Inc. , 2022 , Article)
      In this work, we examine an intelligent reflecting surface (IRS) assisted downlink non-orthogonal multiple access (NOMA) scenario intending to maximize the sum-rate of users. The optimization problem at the IRS is quite ...