Search for dissertations about: "TECHNOLOGY Information technology Telecommunication"

Showing result 21 - 25 of 217 swedish dissertations containing the words TECHNOLOGY Information technology Telecommunication.

  1. 21. Secure and scalable roaming support in heterogeneous access networks

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Daniel Granlund; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Information technology - Telecommunication; Informationsteknik - Telekommunikation; Distribuerade datorsystem; Mobile and Pervasive Computing;

    Abstract : Mobility support for users connecting to the Internet is an increasing trend. Different types of access networks like WiFi, CDMA, and UMTS are available, creating a heterogeneous access network environment. In the Internet today, there are a number of providers of various sizes supporting different technologies. READ MORE

  2. 22. Constellation Design under Channel Uncertainty

    University dissertation from Stockholm : KTH

    Author : Jochen Giese; Mikael Skoglund; Bertrand Hochwald; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Constellation design; diversity; fading channels; frequency-selective channels; joint channel estimation and data detection; multiple antennas; partial channel state information; wireless communication; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : The topic of this thesis is signaling design for data transmission through wireless channels between a transmitter and a receiver that can both be equipped with one or more antennas. In particular, the focus is on channels where the propagation coefficients between each transmitter--receiver antenna pair are only partially known or completetly unknown to the receiver and unknown to the transmitter. READ MORE

  3. 23. Communication and Networking Techniques for Traffic Safety Systems

    University dissertation from Institutionen för datavetenskap

    Author : Ioan Chisalita; Nahid Shahmehri; Shie-Yuan Wang; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vehicular communication; networkking; safety-data; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : Accident statistics indicate that every year a significant number of casualties and extensive property losses occur due to traffic accidents. Consequently, efforts are directed towards developing passive and active safety systems that help reduce the severity of crashes, or prevent vehicles from colliding with one another. READ MORE

  4. 24. Distribution and Individual Watermarking of Streamed Content for Copy Protection

    University dissertation from Institutionen för systemteknik

    Author : Karl-Göran Stenborg; Robert Forchheimer; Peter Parnes; [2005]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Watermarking; Fingerprinting; Video distribution; Broadcast; Multicast; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : Media such as movies and images are nowadays produced and distributed digitally. It is usually simple to make copies of digital content. Consequently illegal pirate copies can be duplicated and distributed in large quantities. One way to deter authorized content receivers from illegally redistributing the media is watermarking. READ MORE

  5. 25. Available-Bandwidth Estimation in Packet-Switched Communication Networks

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Erik Bergfeldt; Johan M Karlsson; Terje Jensen; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Information technology Telecommunication; TEKNIKVETENSKAP Informationsteknik Telekommunikation;

    Abstract : This thesis presents novel methods that are able to perform real-time estimation of the available bandwidth of a network path. In networks such as the Internet, knowledge of bandwidth characteristics is of great significance in, e.g., network monitoring, admission control, and audio/video streaming. READ MORE