تصفح حسب المؤلف "Foukalas, F."

السجلات المعروضة 1 -- 7 من 7

    • Adaptive modulation in multi-user cognitive radio networks over fading channels 

      Foukalas, F.; Khattab, T.; Poor, H. Vincent ( IEEE Computer Society , 2013 , Conference Paper)
      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 user selection among multiple secondary ...

    • Distributed power allocation for multi-flow carrier aggregation in heterogeneous cognitive cellular networks 

      Foukalas F.; Shakeri R.; Khattab T. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)
      In this paper, we study distributed power allocation for multiflow carrier aggregation in cognitive cellular networks. Our approach differs from the conventional water filling (WF) algorithm since we deal with heterogeneous ...

    • 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 ...

    • Interference cancellation through interference alignment for downlink of cognitive cellular networks 

      Moussa, M.; Foukalas, F.; Khattab, T. ( Institution of Engineering and Technology , 2015 , Article)
      Interference cancellation through interference alignment (IA) at the downlink of cognitive cellular networks is proposed. IA helps the spatial resources to be shared among primary and secondary cells, and thus it can provide ...

    • On Channel Selection for Carrier Aggregation Systems 

      Tsinos C.G.; Foukalas F.; Khattab T.; Lai L. ( Institute of Electrical and Electronics Engineers Inc. , 2018 , Article)
      In this paper, the problem of sub-channel selection for carrier aggregation (CA) systems is examined. CA enables the achievement of high data rate links via simultaneous transmissions over multiple component carriers. A ...

    • Packet relaying control in sensing-based spectrum sharing systems 

      Foukalas, F.; Khattab, T.; Poor, H.V. (2013 , Conference Paper)
      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 condition. For spectrum sharing systems, cognitive ...

    • To Relay or Not To Relay in Cognitive Radio Sensor Networks 

      Foukalas, F.; Khattab, T. ( IEEE , 2014 , Article)
      A recent investigation on MAC layer in cognitive radio networks proposed the primary packet relaying by the secondary node maintaining an extra queue used for this particular addable functionality. Nevertheless, relaying ...