Essays about: "Cooperative communications"

Showing result 26 - 30 of 30 essays containing the words Cooperative communications.

  1. 26. DETECTION OF VACANT FREQUENCY BANDS IN COGNITIVE RADIO

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Ahmed Rehan; Ghous Yasir Arfat; [2010]
    Keywords : Cognitive radio; Spectrum Sensing ; Vacant Frequency bands; Spectrum Hole; Spectrum mobility; Cooperation strategies;

    Abstract : Cognitive radio is an exciting promising technology which not only has the potential of dealing with the inflexible prerequisites but also the scarcity of the radio spectrum usage. Such an innovative and transforming technology presents an exemplar change in the design of wireless communication systems, as it allows the efficient utilization of the radio spectrum by transforming the capability to dispersed terminals or radio cells of radio sensing, active spectrum sharing and self-adaptation procedure. READ MORE

  3. 27. COOPERATIVE COMMUNICATION TECHNIQUES IN WIRELESS NETWORKS (ANALYSIS WITH VARIABLE RELAY POSITIONING)

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Danna Nigatu Mitiku; Onwuli Chinedu Lawrence; [2010]
    Keywords : Amplify-and-Forward; Bit-Error-Rate; Cooperative Communications; Decode and Forward; Performance Analysis; Signal-to-Noise-Ratio; Wireless Networks;

    Abstract : Signal transmission in Wireless Networks suffers considerably from many impairments, one of which is channel fading due to multipath propagation. Cooperative communication is a technique which could be employed to mitigate the effects of channel fading by exploiting diversity gain achieved via cooperation between nodes and relays. READ MORE

  4. 28. On The Performance Of Two-Way Amplify-And-Forward Relay Networks

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Le Nam Hoang; [2010]
    Keywords : two-way relay; amplify-and-forward; symbol error rate; average sum-rate; outage probability;

    Abstract : The new paradigm of cooperative communications is a promising resolution to carry out MIMO technique. In this thesis work, we study the performance of cooperative relay networks in which the transmission from a source to a destination is assisted by one or several relaying nodes employing amplify-and-forward (AF) and decode- and-forward (DF) protocols. READ MORE

  5. 29. Wireless Imaging Using Cooperative Diversity of Relay Networks

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Ahsan Haroon; [2010]
    Keywords : DSTBC; SEP; AF; DF; ADF;

    Abstract : Transmit diversity generally requires more than one antenna at the transmitter.However, many wireless devices are limited by size or hardware complexity to one antenna. READ MORE

  6. 30. Coded Cooperative Communications

    University essay from Blekinge Tekniska Högskola/Avdelningen för signalbehandling

    Author : Kamal Khatir; [2007]
    Keywords : Cooperative communication; coding; fading channel; click router;

    Abstract : Wireless communication has been evolving and growing rapidly during the last few years. In order to meet the demand of this growth researchers as well as industry have been working for new techniques and new standardizations. Usually wireless communications performance is badly affected by channel fading. READ MORE