Sökning: "unlicensed"

Visar resultat 1 - 5 av 41 avhandlingar innehållade ordet unlicensed.

  1. 1. Going unlicensed : related behaviors and car crash experience among young drivers

    Författare :Christian Hanna; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :unlicensed;

    Sammanfattning : Background: Globally road traffic injuries are a major cause of injury and mortality, not least among the young. Although unlicensed driving is prevalent in that age group, the phenomenon has not received much attention. LÄS MER

  3. 2. Design of Reliable Communication Solutions for Wireless Sensor Networks : Managing Interference in Unlicensed Bands

    Författare :Luca Stabellini; Jens Zander; Andreas Kassler; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

    Sammanfattning : Recent surveys conducted in the context of industrial automation have outlined that reliability concerns represent today one of the major barriers to the diffusion of wireless communications for sensing and control applications: this limits the potential of wireless sensor networks and slows down the adoption of this new technology. Overcoming these limitations requires that awareness on the causes of unreliability and on the possible solutions to this problem is created. LÄS MER

  4. 3. Coexistence and competition in unlicensed spectrum

    Författare :Olav Queseth; Jens Zander; Douglas Sicker; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signal processing; Signalbehandling;

    Sammanfattning : Spectrum regulation is tricky and until recently the methods used for almost a century has sufficed. But as wireless communication has increased the demands on spectrum has increased. The regulators have responded by relaxing the current regulatory framework as well as opening up more bands for license exempt or unlicensed operation. LÄS MER

  5. 4. Toward Reliable Wireless Sensor Networks : Energy-Aware Distributed interference Management for Unlicensed Bands

    Författare :Luca Stabellini; Jens Zander; Riku Jäntti; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telecommunication; Telekommunikation;

    Sammanfattning : Wireless sensor networks have been proposed as a cost effective and easy to deploy alternative to traditional wired systems in a multitude of application scenarios ranging from industrial automation to healthcare monitoring. They are expected to enable an unparalleled number of new services that will bring countless benefits to society. LÄS MER

  7. 5. A Spectrum Decision Support System for Cognitive Radio Networks

    Författare :Yong Yao; Blekinge Tekniska Högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Cognitive Radio Networks (CRNs) offer a promising capability of alleviating the problem of spectrum insufficiency. In CRNs, the licensed spectrum channels are either exclusively reserved for licensed users or temporarily used by unlicensed users. The requirement for unlicensed users is to not harmfully impair the licensed users transmissions. LÄS MER