Electrical Engineering: Recent submissions

Now showing items 1141-1160 of 2643

    • Average ber of multihop communication systems over fading channels 

      Hasna , Mazen ( IEEE , 2003 , Conference Paper)
      Multihop transmission is a way to attain broader coverage by splitting the communication link from the source to the destination into several, possibly shorter links/hops. This paper presents an expression for the moment ...

    • Performance enhancement of relay-assisted communications via binary feedback 

      Hasna , Mazen ( IEEE , 2004 , Conference Paper)
      This paper proposes a modified two-hop wireless communication system and studies its performance. The modified system has a reliable feedback channel that carries a binary signal from the receiver to inform the transmitter ...

    • Optimal power allocation for relayed transmissions over Rayleigh-fading channels 

      Hasna , Mazen; Alouini M.-S. ( IEEE , 2004 , Article)
      Relayed transmission is a way to attain broader coverage by splitting the communication link from the source to the destination into several shorter links/hops. One of the main advantages of this communication technique ...

    • A performance study of dual-hop transmissions with fixed gain relays 

      Hasna , Mazen; Alouini M.-S. ( IEEE , 2004 , Article)
      This letter presents a study on the end-to-end performance of dual-hop wireless communication systems equipped with nonregenerative fixed gain relays and operating over flat Rayleigh-fading channels. More specifically, it ...

    • Performance of OFDM with M-QAM modulation and optimal loading over rayleigh fading channels 

      Digham F.F.; Hasna , Mazen ( IEEE , 2004 , Conference Paper)
      We present optimum bit and power loading algorithms for orthogonal frequency division multiplexing (OFDM) systems using an M-ary quadrature amplitude modulation (M-QAM) scheme. Several scenarios for the amount of channel ...

    • Average outage duration of multihop communication systems with regenerative relays 

      Yang L.; Hasna , Mazen; Alouini M.-S. ( IEEE , 2005 , Article)
      Closed-form expressions for the average outage duration (AOD) of multihop regenerative communication systems over generalized fading channels are presented. Both noise-limited and interference-limited systems are studied. ...

    • Research in undergraduate education at Qatar University: EE department experience 

      Hasna , Mazen ( IEEE , 2007 , Conference Paper)
      This paper presents the research efforts taking place at Qatar University, the only national university in Qatar. Being a teaching institute, conducting research faces many challenges. The paper focuses on the experience ...

    • Channel assignment of microcellular mobile radio networks 

      Abdel-Naby M.; Nofal M.; Khames S.; El-Khoby H.; Hasna , Mazen ( Institute of Electrical and Electronics Engineers Inc. , 2006 , Conference Paper)
      This paper addresses the analytical and simulation modeling of non overlapping microcells with both non-prioritized and prioritized handover schemes. The network performance is analyzed in terms of the analytical results ...

    • Power loading algorithms for SEC diversity schemes 

      Halwani H.A.; Hasna , Mazen; Alouini M.-S. ( IEEE , 2007 , Conference Paper)
      Switch and Examine Combing (SEC) diversity scheme is one of the simplest diversity schemes to combat fading. When the power used for probing the channels in this scheme is fixed, it can be higher than what is actually ...

    • On the capacity of cooperative diversity systems with adaptive modulation 

      Hasna , Mazen ( IEEE , 2005 , Conference Paper)
      In recent years, cooperative diversity systems have gained increased attention in the literature as a new way of combating the effect of signal fading. In this paper, we investigate the performance of these systems when ...

    • Preparing and educating the Arab Qatari engineer of 2030 

      Hasna , Mazen; Hamouda A.; Boashash B. ( American Society for Engineering Education , 2010 , Conference Paper)
      This paper addresses the issue of adapting Engineering Education to a changing situation in Qatar, a small country that is part of the Arab Gulf Cooperation Council. It presents the framework for a national project planned ...

    • User cooperation schemes in the soft handover regions 

      Tourki K.; Alouini M.-S.; Hasna , Mazen ( IEEE , 2009 , Conference Paper)
      This paper examines the effect of relay-assisted soft handover on the performance of the uplink communication in the third generation mobile networks. We focus on users which are traveling over two cell boundaries in a ...

    • Performance of relay-assisted soft handover 

      Tourki K.; Alouini M.-S.; Hasna , Mazen ( IEEE , 2009 , Conference Paper)
      This paper examines the effect of relay-assisted soft handover on the performance of the uplink communication in the third generation mobile networks. We focus on users which are traveling over two cell boundaries in a ...

    • Development of a remote lab for electrical engineering program 

      Khali A.; Hasna , Mazen; Benammar M.; Chaabane M.; Amar C.B. ( IEEE Computer Society , 2009 , Conference Paper)
      A remote lab for electrical engineering experiments has been designed and implemented. This has been intended as a platform that supports existing traditional labs by offering lab experiments that serve some of the student ...

    • Development of a remote lab for electrical engineering program 

      Khalil A.; Hasna , Mazen; Benammar M.; Chaabane M.; Amar C.B. ( IEEE Computer Society , 2009 , Conference Paper)
      A remote lab for electrical engineering experiments has been designed and implemented. This has been intended as a platform that supports existing traditional labs by offering lab experiments that serve some of the student ...

    • Exact capture probability analysis of GSC receivers over Rayleigh fading channel 

      Nam S.S.; Alouini M.-S.; Hasna , Mazen ( IEEE , 2010 , Conference Paper)
      For third generation systems and ultrawideband systems, RAKE receivers have been introduced due to the advantage of RAKE receivers which is their ability to combine different replicas of the transmitted signal arriving at ...

    • Priority-based scheduling for limited energy cognitive relaying 

      Elsaadany M.; Khattab T.; Hasna , Mazen; Abdallah M.; Khairy M. ( IEEE , 2010 , Conference Paper)
      We study the problem of cognitive relaying with limited-energy constraint in opportunistic spectrum access cognitive networks. Under this network setting, the cognitive user increases the spectrum availability for its own ...

    • Innovative ad-hoc wireless sensor networks to significantly reduce leakages in underground water infrastructures 

      Trinchero, Daniele; Stefanelli, Riccardo; Cisoni, Luca; Kadri, Abdullah; Abu-Dayya, Adnan; ... more authors ( IEEE , 2010 , Conference Paper)
      This paper presents an ICT solution to overcome the problem of water dispersion in water distribution networks. Leakage prevention and breaks identification in water distribution networks are fundamental for an adequate ...

    • Reed-Solomon coding for cooperative wireless communication 

      Shakeel I.; Hasna , Mazen; Abu-Dayya A.; Ghrayeb A. ( IEEE , 2010 , Conference Paper)
      During the last few years, several authors have studied the performance of many different types of channel codes for cooperative communication systems. Some of these codes include Low Density Parity Check (LDPC), Turbo and ...

    • Performance analysis of best relay selection scheme for amplify-and-forward cooperative networks in identical Nakagami-m channels 

      Hussain S.I.; Alouini M.-S.; Hasna , Mazen ( IEEE , 2010 , Conference Paper)
      In cooperative communication networks, the use of multiple relays between the source and the destination was proposed to increase the diversity gain. Since the source and all the relays must transmit on orthogonal channels, ...