Search for dissertations about: "communications"

Showing result 11 - 15 of 1115 swedish dissertations containing the word communications.

  1. 11. Modulation Optimization for Noncoherent Optical Systems

    Author : Johnny Karout; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Direct detection; noncoherent communications; lattice codes; mutual information; fiber-optical communications; intensity modula- tion; sphere packing.; infrared communications; free-space optical communications;

    Abstract : There has been a significant improvement in high-speed electronics and optical components over the past few years, and this is one of the key enabling factors for high data rate transmission. Moreover, multi- level modulation formats, which encode information onto the carrier’s amplitude and phase, are necessary to increase the spectral efficiency of communication systems. READ MORE

  2. 12. Connected Practice The Dynamics of Social Interaction in Shared Virtual Environment

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Maria Spante; [2009]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Informatik; Informatics; Shared virtual environments; virtual reality technology; social interaction; practice; dynamics; time; connected practice.;

    Abstract : This thesis investigates the phenomenon of social interaction in shared virtual environments (SVEs), supported by virtual reality (VR) systems over time. SVEs are computer generated 3D graphical spaces where geographically distributed people can meet and interact with each other in a graphical space. READ MORE

  3. 13. Hacking for Sustainability

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Jorge Luis Zapico Lamela; KTH.; KTH.; KTH.; [2014]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : ICT for Sustainability is a growing research area looking at the potential of information and communication technologies for contributing to sustainability. The existing work in this area can be grouped in four main categories: The optimization of existing systems using ICT, the dematerialization of cultural assets and presence, the use of technology for behavioral change, and the support of sustainability practice and research. READ MORE

  4. 14. Vehicular Communication in Obstructed and Non Line-of-Sight Scenarios

    University dissertation from Lund University

    Author : Dimitrios Vlastaras; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vehicle-to-Vehicle Communications; Channel Modeling; Vehicular Communication; Truck Obstruction; Channel Emulation; Radar; 802.11p; Car; Truck; Accident Avoidance; V2V; V2I; C2C; V2X;

    Abstract : Since the invention of the first car available to masses, the 1908 Ford Model T, technology has advanced towards making car travel safer for occupants and bystanders. In recent years, wireless communication has been introduced in the vehicular industry as a means to avoid accidents and save lives. READ MORE

  5. 15. Common-Mode Aided Wireline Communications

    University dissertation from Thomas Magesacher Department of Information Technology Lund University

    Author : Thomas Magesacher; Lunds universitet.; Lund University.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknik; Technological sciences; DSL; multicarrier modulation; DMT; Shannon capacity; channel modelling; common mode; wireline communications; information processing;

    Abstract : Wireline communication is the Internet access technology with the largest number of subscribers worldwide. On physical-layer level, the traditional way to transmit signals at one end of a wire pair and to extract receive signals at the other end is to apply differential-mode signalling: transmit and receive signals correspond to voltage differences between the two wires. READ MORE