Browsing by Subject "relaying"

Now showing items 1-8 of 8

    • Antenna subset selection at multi-antenna relay with adaptive modulation 

      Choi, Seyeong; Hasna, Mazen O.; Yang, Hong-Chuan; Alouini, Mohamed-Slim ( John Wiley & Sons, Ltd. , 2013 , Article)
      In this paper, we proposed several antenna selection schemes for cooperative diversity systems with adaptive transmission. The proposed schemes were based on dual-hop relaying where a relay with multiple-antenna capabilities ...

    • Exploiting Sparsity in Amplify-and-Forward Broadband Multiple Relay Selection 

      Gouissem, Ala; Hamila, Ridha; Al-dhahir, Naofal; Foufou, Sebti ( IEEE , 2019 , Article)
      Cooperative communication has attracted significant attention in the last decade due to its ability to increase the spatial diversity order with only single-antenna nodes. However, most of the techniques in the literature ...

    • Maximum throughput of a cooperative energy harvesting cognitive radio user 

      El Shafie, Ahmed; Khattab, Tamer ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Conference Paper)
      In this paper, we investigate the maximum throughput of a saturated rechargeable secondary user (SU) sharing the spectrum with a primary user (PU). The SU harvests energy packets (tokens) from the environment with a certain ...

    • Opportunistic spectrum sharing in relay-assisted cognitive systems with imperfect CSI 

      Hamdi, Karama; Hasna, Mazen O.; Ghrayeb, Ali; Letaief, Khaled Ben ( IEEE , 2014 , Article)
      In this paper, we consider spectrum sharing between cognitive radio (CR) users and a licensed primary user (PU) to enhance the spectrum efficiency. In the considered scenario, the PU is not able to successfully transmit ...

    • Priority-based zero-forcing in spectrum sharing cognitive systems 

      Hamdi K.; Hasna , Mazen; Ghrayeb A.; Letaief K.B. ( IEEE , 2013 , Article)
      We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station ...

    • Relay-Assisted Primary and Secondary Transmissions in Cognitive Radio Networks 

      El Shafie, Ahmed; Khattab, Tamer; Sultan Salem, Ahmed ( Institute of Electrical and Electronics Engineers Inc. , 2016 , Article)
      We assume a set of cognitive relay nodes that assists both primary and secondary transmissions in a time-slotted cognitive radio networks. To regulate the channel access of the various nodes in the network, we propose an ...

    • Unified Performance Analysis for Multiuser Mixed η - μ and M - Distribution Dual-Hop RF/FSO Systems 

      Yang, Liang; Hasna, Mazen O.; Ansari, Imran Shafique ( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)
      A mixed free-space optical (FSO) communication scheme is considered with the help of a fixed gain relay. We assume that the links from the source to the relay are radio frequency links with multiuser diversity operating ...

    • Utility-based uplink scheduling algorithm for enhancing throughput and fairness in relayed LTE networks 

      Ruby R.; Mohamed A.; Leung V. ( IEEE , 2010 , Conference Paper)
      Relaying is one of the key techniques considered by the 3GPP LTE-Advanced as part of 4G cellular technologies, aiming to increase the coverage and capacity of the network especially for the edge nodes. In this work, we ...